X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=t%2Fop%2Fpat.t;h=88fbe5d9f838b1d35d246b05110ac9066b3d04d1;hb=c966426a3bb6619c8372ea83168fa58260cf133b;hp=0b5c1a50af7a50228824f750fec8f330e8ea582c;hpb=36daacbf16af0fc5c17305125bd7b7f77f173066;p=p5sagit%2Fp5-mst-13.2.git

diff --git a/t/op/pat.t b/t/op/pat.t
index 0b5c1a5..88fbe5d 100755
--- a/t/op/pat.t
+++ b/t/op/pat.t
@@ -4,3520 +4,4343 @@
 # the format supported by op/regexp.t.  If you want to add a test
 # that does fit that format, add it to op/re_tests, not here.
 
+use strict;
+use warnings;
+use 5.010;
+
+
+sub run_tests;
+
 $| = 1;
 
-print "1..1208\n";
+my $EXPECTED_TESTS = 4061;  # Update this when adding/deleting tests.
 
 BEGIN {
     chdir 't' if -d 't';
     @INC = '../lib';
 }
-
+our $TODO;
+our $Message = "Noname test";
+our $Error;
+our $DiePattern;
+our $WarnPattern;
+our $BugId;
+our $PatchId;
+our $running_as_thread;
+
+my $ordA = ord ('A');  # This defines ASCII/UTF-8 vs EBCDIC/UTF-EBCDIC
+# This defined the platform.
+my $IS_ASCII  = $ordA ==  65;
+my $IS_EBCDIC = $ordA == 193;
+
+use vars '%Config';
 eval 'use Config';          #  Defaults assumed if this fails
 
-$x = "abc\ndef\n";
-
-if ($x =~ /^abc/) {print "ok 1\n";} else {print "not ok 1\n";}
-if ($x !~ /^def/) {print "ok 2\n";} else {print "not ok 2\n";}
-
-# used to be a test for $*
-if ($x =~ /^def/m) {print "ok 3\n";} else {print "not ok 3\n";}
-
-$_ = '123';
-if (/^([0-9][0-9]*)/) {print "ok 4\n";} else {print "not ok 4\n";}
+my $test = 0;
 
-if ($x =~ /^xxx/) {print "not ok 5\n";} else {print "ok 5\n";}
-if ($x !~ /^abc/) {print "not ok 6\n";} else {print "ok 6\n";}
+print "1..$EXPECTED_TESTS\n";
 
-if ($x =~ /def/) {print "ok 7\n";} else {print "not ok 7\n";}
-if ($x !~ /def/) {print "not ok 8\n";} else {print "ok 8\n";}
+run_tests unless caller ();
 
-if ($x !~ /.def/) {print "ok 9\n";} else {print "not ok 9\n";}
-if ($x =~ /.def/) {print "not ok 10\n";} else {print "ok 10\n";}
-
-if ($x =~ /\ndef/) {print "ok 11\n";} else {print "not ok 11\n";}
-if ($x !~ /\ndef/) {print "not ok 12\n";} else {print "ok 12\n";}
+END {
+}
 
-$_ = 'aaabbbccc';
-if (/(a*b*)(c*)/ && $1 eq 'aaabbb' && $2 eq 'ccc') {
-	print "ok 13\n";
-} else {
-	print "not ok 13\n";
+sub pretty {
+    my ($mess) = @_;
+    $mess =~ s/\n/\\n/g;
+    $mess =~ s/\r/\\r/g;
+    $mess =~ s/\t/\\t/g;
+    $mess =~ s/([\00-\37\177])/sprintf '\%03o', ord $1/eg;
+    $mess =~ s/#/\\#/g;
+    $mess;
 }
-if (/(a+b+c+)/ && $1 eq 'aaabbbccc') {
-	print "ok 14\n";
-} else {
-	print "not ok 14\n";
+
+sub safe_globals {
+    defined($_) and s/#/\\#/g for $BugId, $PatchId, $TODO;
 }
 
-if (/a+b?c+/) {print "not ok 15\n";} else {print "ok 15\n";}
+sub _ok {
+    my ($ok, $mess, $error) = @_;
+    safe_globals();
+    $mess    = pretty ($mess // $Message);
+    $mess   .= "; Bug $BugId"     if defined $BugId;
+    $mess   .= "; Patch $PatchId" if defined $PatchId;
+    $mess   .= " # TODO $TODO"     if defined $TODO;
+
+    my $line_nr = (caller(1)) [2];
+
+    printf "%sok %d - %s\n",
+              ($ok ? "" : "not "),
+              ++ $test,
+              "$mess\tLine $line_nr";
+
+    unless ($ok) {
+        print "# Failed test at line $line_nr\n" unless defined $TODO;
+        if ($error //= $Error) {
+            no warnings 'utf8';
+            chomp $error;
+            $error = join "\n#", map {pretty $_} split /\n\h*#/ => $error;
+            $error = "# $error" unless $error =~ /^\h*#/;
+            print $error, "\n";
+        }
+    }
 
-$_ = 'aaabccc';
-if (/a+b?c+/) {print "ok 16\n";} else {print "not ok 16\n";}
-if (/a*b+c*/) {print "ok 17\n";} else {print "not ok 17\n";}
+    return $ok;
+}
 
-$_ = 'aaaccc';
-if (/a*b?c*/) {print "ok 18\n";} else {print "not ok 18\n";}
-if (/a*b+c*/) {print "not ok 19\n";} else {print "ok 19\n";}
+# Force scalar context on the pattern match
+sub  ok ($;$$) {_ok  $_ [0], $_ [1], $_ [2]}
+sub nok ($;$$) {_ok !$_ [0], "Failed: " . ($_ [1] // $Message), $_ [2]}
 
-$_ = 'abcdef';
-if (/bcd|xyz/) {print "ok 20\n";} else {print "not ok 20\n";}
-if (/xyz|bcd/) {print "ok 21\n";} else {print "not ok 21\n";}
 
-if (m|bc/*d|) {print "ok 22\n";} else {print "not ok 22\n";}
+sub skip {
+    my $why = shift;
+    safe_globals();
+    $why =~ s/\n.*//s;
+    $why .= "; Bug $BugId" if defined $BugId;
+    # seems like the new harness code doesnt like todo and skip to be mixed.
+    # which seems like a bug in the harness to me. -- dmq
+    #$why .= " # TODO $TODO" if defined $TODO;
+    
+    my $n = shift // 1;
+    my $line_nr = (caller(0)) [2];
+    for (1 .. $n) {
+        ++ $test;
+        #print "not " if defined $TODO;
+        print "ok $test # skip $why\tLine $line_nr\n";
+    }
+    no warnings "exiting";
+    last SKIP;
+}
 
-if (/^$_$/) {print "ok 23\n";} else {print "not ok 23\n";}
+sub iseq ($$;$) { 
+    my ($got, $expect, $name) = @_;
+    
+    $_ = defined ($_) ? "'$_'" : "undef" for $got, $expect;
+        
+    my $ok    = $got eq $expect;
+    my $error = "# expected: $expect\n" .
+                "#   result: $got";
+
+    _ok $ok, $name, $error;
+}   
+
+sub isneq ($$;$) { 
+    my ($got, $expect, $name) = @_;
+    my $todo = $TODO ? " # TODO $TODO" : '';
+    
+    $_ = defined ($_) ? "'$_'" : "undef" for $got, $expect;
+        
+    my $ok    = $got ne $expect;
+    my $error = "# results are equal ($got)";
 
-# used to be a test for $*
-if ("ab\ncd\n" =~ /^cd/m) {print "ok 24\n";} else {print "not ok 24\n";}
+    _ok $ok, $name, $error;
+}   
 
-$XXX{123} = 123;
-$XXX{234} = 234;
-$XXX{345} = 345;
 
-@XXX = ('ok 25','not ok 25', 'ok 26','not ok 26','not ok 27');
-while ($_ = shift(@XXX)) {
-    ?(.*)? && (print $1,"\n");
-    /not/ && reset;
-    if (/not ok 26/) {
-      if ($^O eq 'VMS') {
-	$_ = shift(@XXX);
-      }
-      else {
-	reset 'X';
-      }
-   }
+sub eval_ok ($;$) {
+    my ($code, $name) = @_;
+    local $@;
+    if (ref $code) {
+        _ok eval {&$code} && !$@, $name;
+    }
+    else {
+        _ok eval  ($code) && !$@, $name;
+    }
 }
 
-if ($^O ne 'VMS') {
-  while (($key,$val) = each(%XXX)) {
-    print "not ok 27\n";
-    exit;
-  }
+sub must_die {
+    my ($code, $pattern, $name) = @_;
+    $pattern //= $DiePattern;
+    undef $@;
+    ref $code ? &$code : eval $code;
+    my  $r = $@ && $@ =~ /$pattern/;
+    _ok $r, $name // $Message // "\$\@ =~ /$pattern/";
 }
 
-print "ok 27\n";
-
-'cde' =~ /[^ab]*/;
-'xyz' =~ //;
-if ($& eq 'xyz') {print "ok 28\n";} else {print "not ok 28\n";}
-
-$foo = '[^ab]*';
-'cde' =~ /$foo/;
-'xyz' =~ //;
-if ($& eq 'xyz') {print "ok 29\n";} else {print "not ok 29\n";}
-
-$foo = '[^ab]*';
-'cde' =~ /$foo/;
-'xyz' =~ /$null/;
-if ($& eq 'xyz') {print "ok 30\n";} else {print "not ok 30\n";}
-
-$_ = 'abcdefghi';
-/def/;		# optimized up to cmd
-if ("$`:$&:$'" eq 'abc:def:ghi') {print "ok 31\n";} else {print "not ok 31\n";}
-
-/cde/ + 0;	# optimized only to spat
-if ("$`:$&:$'" eq 'ab:cde:fghi') {print "ok 32\n";} else {print "not ok 32\n";}
-
-/[d][e][f]/;	# not optimized
-if ("$`:$&:$'" eq 'abc:def:ghi') {print "ok 33\n";} else {print "not ok 33\n";}
-
-$_ = 'now is the {time for all} good men to come to.';
-/ {([^}]*)}/;
-if ($1 eq 'time for all') {print "ok 34\n";} else {print "not ok 34 $1\n";}
-
-$_ = 'xxx {3,4}  yyy   zzz';
-print /( {3,4})/ ? "ok 35\n" : "not ok 35\n";
-print $1 eq '   ' ? "ok 36\n" : "not ok 36\n";
-print /( {4,})/ ? "not ok 37\n" : "ok 37\n";
-print /( {2,3}.)/ ? "ok 38\n" : "not ok 38\n";
-print $1 eq '  y' ? "ok 39\n" : "not ok 39\n";
-print /(y{2,3}.)/ ? "ok 40\n" : "not ok 40\n";
-print $1 eq 'yyy ' ? "ok 41\n" : "not ok 41\n";
-print /x {3,4}/ ? "not ok 42\n" : "ok 42\n";
-print /^xxx {3,4}/ ? "not ok 43\n" : "ok 43\n";
-
-$_ = "now is the time for all good men to come to.";
-@words = /(\w+)/g;
-print join(':',@words) eq "now:is:the:time:for:all:good:men:to:come:to"
-    ? "ok 44\n"
-    : "not ok 44\n";
-
-@words = ();
-while (/\w+/g) {
-    push(@words, $&);
-}
-print join(':',@words) eq "now:is:the:time:for:all:good:men:to:come:to"
-    ? "ok 45\n"
-    : "not ok 45\n";
-
-@words = ();
-pos = 0;
-while (/to/g) {
-    push(@words, $&);
-}
-print join(':',@words) eq "to:to"
-    ? "ok 46\n"
-    : "not ok 46 `@words'\n";
-
-pos $_ = 0;
-@words = /to/g;
-print join(':',@words) eq "to:to"
-    ? "ok 47\n"
-    : "not ok 47 `@words'\n";
-
-$_ = "abcdefghi";
-
-$pat1 = 'def';
-$pat2 = '^def';
-$pat3 = '.def.';
-$pat4 = 'abc';
-$pat5 = '^abc';
-$pat6 = 'abc$';
-$pat7 = 'ghi';
-$pat8 = '\w*ghi';
-$pat9 = 'ghi$';
-
-$t1=$t2=$t3=$t4=$t5=$t6=$t7=$t8=$t9=0;
-
-for $iter (1..5) {
-    $t1++ if /$pat1/o;
-    $t2++ if /$pat2/o;
-    $t3++ if /$pat3/o;
-    $t4++ if /$pat4/o;
-    $t5++ if /$pat5/o;
-    $t6++ if /$pat6/o;
-    $t7++ if /$pat7/o;
-    $t8++ if /$pat8/o;
-    $t9++ if /$pat9/o;
+sub must_warn {
+    my ($code, $pattern, $name) = @_;
+    $pattern //= $WarnPattern;
+    my $w;
+    local $SIG {__WARN__} = sub {$w .= join "" => @_};
+    use warnings 'all';
+    ref $code ? &$code : eval $code;
+    my $r = $w && $w =~ /$pattern/;
+    $w //= "UNDEF";
+    _ok $r, $name // $Message // "Got warning /$pattern/",
+            "# expected: /$pattern/\n" .
+            "#   result: $w";
 }
 
-$x = "$t1$t2$t3$t4$t5$t6$t7$t8$t9";
-print $x eq '505550555' ? "ok 48\n" : "not ok 48 $x\n";
-
-$xyz = 'xyz';
-print "abc" =~ /^abc$|$xyz/ ? "ok 49\n" : "not ok 49\n";
-
-# perl 4.009 says "unmatched ()"
-eval '"abc" =~ /a(bc$)|$xyz/; $result = "$&:$1"';
-print $@ eq "" ? "ok 50\n" : "not ok 50\n";
-print $result eq "abc:bc" ? "ok 51\n" : "not ok 51\n";
-
-
-$_="abcfooabcbar";
-$x=/abc/g;
-print $` eq "" ? "ok 52\n" : "not ok 52\n" if $x;
-$x=/abc/g;
-print $` eq "abcfoo" ? "ok 53\n" : "not ok 53\n" if $x;
-$x=/abc/g;
-print $x == 0 ? "ok 54\n" : "not ok 54\n";
-pos = 0;
-$x=/ABC/gi;
-print $` eq "" ? "ok 55\n" : "not ok 55\n" if $x;
-$x=/ABC/gi;
-print $` eq "abcfoo" ? "ok 56\n" : "not ok 56\n" if $x;
-$x=/ABC/gi;
-print $x == 0 ? "ok 57\n" : "not ok 57\n";
-pos = 0;
-$x=/abc/g;
-print $' eq "fooabcbar" ? "ok 58\n" : "not ok 58\n" if $x;
-$x=/abc/g;
-print $' eq "bar" ? "ok 59\n" : "not ok 59\n" if $x;
-$_ .= '';
-@x=/abc/g;
-print scalar @x == 2 ? "ok 60\n" : "not ok 60\n";
-
-$_ = "abdc";
-pos $_ = 2;
-/\Gc/gc;
-print "not " if (pos $_) != 2;
-print "ok 61\n";
-/\Gc/g;
-print "not " if defined pos $_;
-print "ok 62\n";
-
-$out = 1;
-'abc' =~ m'a(?{ $out = 2 })b';
-print "not " if $out != 2;
-print "ok 63\n";
-
-$out = 1;
-'abc' =~ m'a(?{ $out = 3 })c';
-print "not " if $out != 1;
-print "ok 64\n";
-
-$_ = 'foobar1 bar2 foobar3 barfoobar5 foobar6';
-@out = /(?<!foo)bar./g;
-print "not " if "@out" ne 'bar2 barf';
-print "ok 65\n";
-
-# Tests which depend on REG_INFTY
-$reg_infty = defined $Config{reg_infty} ? $Config{reg_infty} : 32767;
-$reg_infty_m = $reg_infty - 1; $reg_infty_p = $reg_infty + 1;
-
-# As well as failing if the pattern matches do unexpected things, the
-# next three tests will fail if you should have picked up a lower-than-
-# default value for $reg_infty from Config.pm, but have not.
-
-undef $@;
-print "not " if eval q(('aaa' =~ /(a{1,$reg_infty_m})/)[0] ne 'aaa') || $@;
-print "ok 66\n";
-
-undef $@;
-print "not " if eval q(('a' x $reg_infty_m) !~ /a{$reg_infty_m}/) || $@;
-print "ok 67\n";
-
-undef $@;
-print "not " if eval q(('a' x ($reg_infty_m - 1)) =~ /a{$reg_infty_m}/) || $@;
-print "ok 68\n";
-
-undef $@;
-eval "'aaa' =~ /a{1,$reg_infty}/";
-print "not " if $@ !~ m%^\QQuantifier in {,} bigger than%;
-print "ok 69\n";
-
-eval "'aaa' =~ /a{1,$reg_infty_p}/";
-print "not "
-	if $@ !~ m%^\QQuantifier in {,} bigger than%;
-print "ok 70\n";
-undef $@;
-
-# Poke a couple more parse failures
-
-$context = 'x' x 256;
-eval qq("${context}y" =~ /(?<=$context)y/);
-print "not " if $@ !~ m%^\QLookbehind longer than 255 not%;
-print "ok 71\n";
-
-# removed test
-print "ok 72\n";
-
-# Long Monsters
-$test = 73;
-for $l (125, 140, 250, 270, 300000, 30) { # Ordered to free memory
-  $a = 'a' x $l;
-  print "# length=$l\nnot " unless "ba$a=" =~ /a$a=/;
-  print "ok $test\n";
-  $test++;
-
-  print "not " if "b$a=" =~ /a$a=/;
-  print "ok $test\n";
-  $test++;
+sub may_not_warn {
+    my ($code, $name) = @_;
+    my $w;
+    local $SIG {__WARN__} = sub {$w .= join "" => @_};
+    use warnings 'all';
+    ref $code ? &$code : eval $code;
+    _ok !$w, $name // ($Message ? "$Message (did not warn)"
+                                : "Did not warn"),
+             "Got warning '$w'";
 }
 
-# 20000 nodes, each taking 3 words per string, and 1 per branch
-$long_constant_len = join '|', 12120 .. 32645;
-$long_var_len = join '|', 8120 .. 28645;
-%ans = ( 'ax13876y25677lbc' => 1,
-	 'ax13876y25677mcb' => 0, # not b.
-	 'ax13876y35677nbc' => 0, # Num too big
-	 'ax13876y25677y21378obc' => 1,
-	 'ax13876y25677y21378zbc' => 0,	# Not followed by [k-o]
-	 'ax13876y25677y21378y21378kbc' => 1,
-	 'ax13876y25677y21378y21378kcb' => 0, # Not b.
-	 'ax13876y25677y21378y21378y21378kbc' => 0, # 5 runs
-       );
-
-for ( keys %ans ) {
-  print "# const-len `$_' not =>  $ans{$_}\nnot "
-    if $ans{$_} xor /a(?=([yx]($long_constant_len)){2,4}[k-o]).*b./o;
-  print "ok $test\n";
-  $test++;
-  print "# var-len   `$_' not =>  $ans{$_}\nnot "
-    if $ans{$_} xor /a(?=([yx]($long_var_len)){2,4}[k-o]).*b./o;
-  print "ok $test\n";
-  $test++;
-}
 
-$_ = " a (bla()) and x(y b((l)u((e))) and b(l(e)e)e";
-$expect = "(bla()) ((l)u((e))) (l(e)e)";
-
-sub matchit {
-  m/
-     (
-       \(
-       (?{ $c = 1 })		# Initialize
-       (?:
-	 (?(?{ $c == 0 })       # PREVIOUS iteration was OK, stop the loop
-	   (?!
-	   )			# Fail: will unwind one iteration back
-	 )	
-	 (?:
-	   [^()]+		# Match a big chunk
-	   (?=
-	     [()]
-	   )			# Do not try to match subchunks
-	 |
-	   \(
-	   (?{ ++$c })
-	 |
-	   \)
-	   (?{ --$c })
-	 )
-       )+			# This may not match with different subblocks
-     )
-     (?(?{ $c != 0 })
-       (?!
-       )			# Fail
-     )				# Otherwise the chunk 1 may succeed with $c>0
-   /xg;
-}
+#
+# Tests start here.
+#
+sub run_tests {
 
-@ans = ();
-push @ans, $res while $res = matchit;
-
-print "# ans='@ans'\n# expect='$expect'\nnot " if "@ans" ne "1 1 1";
-print "ok $test\n";
-$test++;
-
-@ans = matchit;
-
-print "# ans='@ans'\n# expect='$expect'\nnot " if "@ans" ne $expect;
-print "ok $test\n";
-$test++;
-
-print "not " unless "abc" =~ /^(??{"a"})b/;
-print "ok $test\n";
-$test++;
-
-my $matched;
-$matched = qr/\((?:(?>[^()]+)|(??{$matched}))*\)/;
-
-@ans = @ans1 = ();
-push(@ans, $res), push(@ans1, $&) while $res = m/$matched/g;
-
-print "# ans='@ans'\n# expect='$expect'\nnot " if "@ans" ne "1 1 1";
-print "ok $test\n";
-$test++;
-
-print "# ans1='@ans1'\n# expect='$expect'\nnot " if "@ans1" ne $expect;
-print "ok $test\n";
-$test++;
-
-@ans = m/$matched/g;
-
-print "# ans='@ans'\n# expect='$expect'\nnot " if "@ans" ne $expect;
-print "ok $test\n";
-$test++;
-
-@ans = ('a/b' =~ m%(.*/)?(.*)%);	# Stack may be bad
-print "not " if "@ans" ne 'a/ b';
-print "ok $test\n";
-$test++;
-
-$code = '{$blah = 45}';
-$blah = 12;
-eval { /(?$code)/ };
-print "not " unless $@ and $@ =~ /not allowed at runtime/ and $blah == 12;
-print "ok $test\n";
-$test++;
-
-for $code ('{$blah = 45}','=xx') {
-  $blah = 12;
-  $res = eval { "xx" =~ /(?$code)/o };
-  if ($code eq '=xx') {
-    print "#'$@','$res','$blah'\nnot " unless not $@ and $res;
-  } else {
-    print "#'$@','$res','$blah'\nnot " unless $@ and $@ =~ /not allowed at runtime/ and $blah == 12;
-  }
-  print "ok $test\n";
-  $test++;
-}
+    {
 
-$code = '{$blah = 45}';
-$blah = 12;
-eval "/(?$code)/";			
-print "not " if $blah != 45;
-print "ok $test\n";
-$test++;
-
-$blah = 12;
-/(?{$blah = 45})/;			
-print "not " if $blah != 45;
-print "ok $test\n";
-$test++;
-
-$x = 'banana';
-$x =~ /.a/g;
-print "not " unless pos($x) == 2;
-print "ok $test\n";
-$test++;
-
-$x =~ /.z/gc;
-print "not " unless pos($x) == 2;
-print "ok $test\n";
-$test++;
-
-sub f {
-    my $p = $_[0];
-    return $p;
-}
+        my $x = "abc\ndef\n";
 
-$x =~ /.a/g;
-print "not " unless f(pos($x)) == 4;
-print "ok $test\n";
-$test++;
-
-$x = $^R = 67;
-'foot' =~ /foo(?{$x = 12; 75})[t]/;
-print "not " unless $^R eq '75';
-print "ok $test\n";
-$test++;
-
-$x = $^R = 67;
-'foot' =~ /foo(?{$x = 12; 75})[xy]/;
-print "not " unless $^R eq '67' and $x eq '12';
-print "ok $test\n";
-$test++;
-
-$x = $^R = 67;
-'foot' =~ /foo(?{ $^R + 12 })((?{ $x = 12; $^R + 17 })[xy])?/;
-print "not " unless $^R eq '79' and $x eq '12';
-print "ok $test\n";
-$test++;
-
-print "not " unless qr/\b\v$/i eq '(?i-xsm:\bv$)';
-print "ok $test\n";
-$test++;
-
-print "not " unless qr/\b\v$/s eq '(?s-xim:\bv$)';
-print "ok $test\n";
-$test++;
-
-print "not " unless qr/\b\v$/m eq '(?m-xis:\bv$)';
-print "ok $test\n";
-$test++;
-
-print "not " unless qr/\b\v$/x eq '(?x-ism:\bv$)';
-print "ok $test\n";
-$test++;
-
-print "not " unless qr/\b\v$/xism eq '(?msix:\bv$)';
-print "ok $test\n";
-$test++;
-
-print "not " unless qr/\b\v$/ eq '(?-xism:\bv$)';
-print "ok $test\n";
-$test++;
-
-$_ = 'xabcx';
-foreach $ans ('', 'c') {
-  /(?<=(?=a)..)((?=c)|.)/g;
-  print "# \$1  ='$1'\n# \$ans='$ans'\nnot " unless $1 eq $ans;
-  print "ok $test\n";
-  $test++;
-}
+        ok $x =~ /^abc/,  qq ["$x" =~ /^abc/];
+        ok $x !~ /^def/,  qq ["$x" !~ /^def/];
 
-$_ = 'a';
-foreach $ans ('', 'a', '') {
-  /^|a|$/g;
-  print "# \$&  ='$&'\n# \$ans='$ans'\nnot " unless $& eq $ans;
-  print "ok $test\n";
-  $test++;
-}
+        # used to be a test for $*
+        ok $x =~ /^def/m, qq ["$x" =~ /^def/m];
 
-sub prefixify {
-  my($v,$a,$b,$res) = @_;
-  $v =~ s/\Q$a\E/$b/;
-  print "not " unless $res eq $v;
-  print "ok $test\n";
-  $test++;
-}
-prefixify('/a/b/lib/arch', "/a/b/lib", 'X/lib', 'X/lib/arch');
-prefixify('/a/b/man/arch', "/a/b/man", 'X/man', 'X/man/arch');
-
-$_ = 'var="foo"';
-/(\")/;
-print "not " unless $1 and /$1/;
-print "ok $test\n";
-$test++;
-
-$a=qr/(?{++$b})/;
-$b = 7;
-/$a$a/;
-print "not " unless $b eq '9';
-print "ok $test\n";
-$test++;
-
-$c="$a";
-/$a$a/;
-print "not " unless $b eq '11';
-print "ok $test\n";
-$test++;
-
-{
-  use re "eval";
-  /$a$c$a/;
-  print "not " unless $b eq '14';
-  print "ok $test\n";
-  $test++;
-
-  local $lex_a = 2;
-  my $lex_a = 43;
-  my $lex_b = 17;
-  my $lex_c = 27;
-  my $lex_res = ($lex_b =~ qr/$lex_b(?{ $lex_c = $lex_a++ })/);
-  print "not " unless $lex_res eq '1';
-  print "ok $test\n";
-  $test++;
-  print "not " unless $lex_a eq '44';
-  print "ok $test\n";
-  $test++;
-  print "not " unless $lex_c eq '43';
-  print "ok $test\n";
-  $test++;
-
-
-  no re "eval";
-  $match = eval { /$a$c$a/ };
-  print "not "
-    unless $b eq '14' and $@ =~ /Eval-group not allowed/ and not $match;
-  print "ok $test\n";
-  $test++;
-}
+        nok $x =~ /^xxx/, qq ["$x" =~ /^xxx/];
+        nok $x !~ /^abc/, qq ["$x" !~ /^abc/];
 
-{
-  local $lex_a = 2;
-  my $lex_a = 43;
-  my $lex_b = 17;
-  my $lex_c = 27;
-  my $lex_res = ($lex_b =~ qr/17(?{ $lex_c = $lex_a++ })/);
-  print "not " unless $lex_res eq '1';
-  print "ok $test\n";
-  $test++;
-  print "not " unless $lex_a eq '44';
-  print "ok $test\n";
-  $test++;
-  print "not " unless $lex_c eq '43';
-  print "ok $test\n";
-  $test++;
-}
+         ok $x =~ /def/, qq ["$x" =~ /def/];
+        nok $x !~ /def/, qq ["$x" !~ /def/];
 
-{
-  package aa;
-  $c = 2;
-  $::c = 3;
-  '' =~ /(?{ $c = 4 })/;
-  print "not " unless $c == 4;
-}
-print "ok $test\n";
-$test++;
-print "not " unless $c == 3;
-print "ok $test\n";
-$test++;
-
-sub must_warn_pat {
-    my $warn_pat = shift;
-    return sub { print "not " unless $_[0] =~ /$warn_pat/ }
-}
+         ok $x !~ /.def/, qq ["$x" !~ /.def/];
+        nok $x =~ /.def/, qq ["$x" =~ /.def/];
 
-sub must_warn {
-    my ($warn_pat, $code) = @_;
-    local %SIG;
-    eval 'BEGIN { use warnings; $SIG{__WARN__} = $warn_pat };' . $code;
-    print "ok $test\n";
-    $test++;
-}
+         ok $x =~ /\ndef/, qq ["$x" =~ /\ndef/];
+        nok $x !~ /\ndef/, qq ["$x" !~ /\ndef/];
+    }
 
+    {
+        $_ = '123';
+        ok /^([0-9][0-9]*)/, qq [\$_ = '$_'; /^([0-9][0-9]*)/];
+    }
 
-sub make_must_warn {
-    my $warn_pat = shift;
-    return sub { must_warn(must_warn_pat($warn_pat)) }
-}
+    {
+        $_ = 'aaabbbccc';
+         ok /(a*b*)(c*)/ && $1 eq 'aaabbb' && $2 eq 'ccc',
+                                             qq [\$_ = '$_'; /(a*b*)(c*)/];
+         ok /(a+b+c+)/ && $1 eq 'aaabbbccc', qq [\$_ = '$_'; /(a+b+c+)/];
+        nok /a+b?c+/,                        qq [\$_ = '$_'; /a+b?c+/];
+
+        $_ = 'aaabccc';
+         ok /a+b?c+/, qq [\$_ = '$_'; /a+b?c+/];
+         ok /a*b?c*/, qq [\$_ = '$_'; /a*b?c*/];
+
+        $_ = 'aaaccc';
+         ok /a*b?c*/, qq [\$_ = '$_'; /a*b?c*/];
+        nok /a*b+c*/, qq [\$_ = '$_'; /a*b+c*/];
+
+        $_ = 'abcdef';
+         ok /bcd|xyz/, qq [\$_ = '$_'; /bcd|xyz/];
+         ok /xyz|bcd/, qq [\$_ = '$_'; /xyz|bcd/];
+         ok m|bc/*d|,  qq [\$_ = '$_'; m|bc/*d|];
+         ok /^$_$/,    qq [\$_ = '$_'; /^\$_\$/];
+    }
 
-my $for_future = make_must_warn('reserved for future extensions');
-
-&$for_future('q(a:[b]:) =~ /[x[:foo:]]/');
-
-#&$for_future('q(a=[b]=) =~ /[x[=foo=]]/');
-print "ok $test\n"; $test++; # now a fatal croak
-
-#&$for_future('q(a.[b].) =~ /[x[.foo.]]/');
-print "ok $test\n"; $test++; # now a fatal croak
-
-# test if failure of patterns returns empty list
-$_ = 'aaa';
-@_ = /bbb/;
-print "not " if @_;
-print "ok $test\n";
-$test++;
-
-@_ = /bbb/g;
-print "not " if @_;
-print "ok $test\n";
-$test++;
-
-@_ = /(bbb)/;
-print "not " if @_;
-print "ok $test\n";
-$test++;
-
-@_ = /(bbb)/g;
-print "not " if @_;
-print "ok $test\n";
-$test++;
-
-/a(?=.$)/;
-print "not " if $#+ != 0 or $#- != 0;
-print "ok $test\n";
-$test++;
-
-print "not " if $+[0] != 2 or $-[0] != 1;
-print "ok $test\n";
-$test++;
-
-print "not "
-   if defined $+[1] or defined $-[1] or defined $+[2] or defined $-[2];
-print "ok $test\n";
-$test++;
-
-/a(a)(a)/;
-print "not " if $#+ != 2 or $#- != 2;
-print "ok $test\n";
-$test++;
-
-print "not " if $+[0] != 3 or $-[0] != 0;
-print "ok $test\n";
-$test++;
-
-print "not " if $+[1] != 2 or $-[1] != 1;
-print "ok $test\n";
-$test++;
-
-print "not " if $+[2] != 3 or $-[2] != 2;
-print "ok $test\n";
-$test++;
-
-print "not "
-   if defined $+[3] or defined $-[3] or defined $+[4] or defined $-[4];
-print "ok $test\n";
-$test++;
-
-/.(a)(b)?(a)/;
-print "not " if $#+ != 3 or $#- != 3;
-print "ok $test\n";
-$test++;
-
-print "not " if $+[0] != 3 or $-[0] != 0;
-print "ok $test\n";
-$test++;
-
-print "not " if $+[1] != 2 or $-[1] != 1;
-print "ok $test\n";
-$test++;
-
-print "not " if $+[3] != 3 or $-[3] != 2;
-print "ok $test\n";
-$test++;
-
-print "not "
-   if defined $+[2] or defined $-[2] or defined $+[4] or defined $-[4];
-print "ok $test\n";
-$test++;
-
-/.(a)/;
-print "not " if $#+ != 1 or $#- != 1;
-print "ok $test\n";
-$test++;
-
-print "not " if $+[0] != 2 or $-[0] != 0;
-print "ok $test\n";
-$test++;
-
-print "not " if $+[1] != 2 or $-[1] != 1;
-print "ok $test\n";
-$test++;
-
-print "not "
-   if defined $+[2] or defined $-[2] or defined $+[3] or defined $-[3];
-print "ok $test\n";
-$test++;
-
-eval { $+[0] = 13; };
-print "not "
-   if $@ !~ /^Modification of a read-only value attempted/;
-print "ok $test\n";
-$test++;
-
-eval { $-[0] = 13; };
-print "not "
-   if $@ !~ /^Modification of a read-only value attempted/;
-print "ok $test\n";
-$test++;
-
-eval { @+ = (7, 6, 5); };
-print "not "
-   if $@ !~ /^Modification of a read-only value attempted/;
-print "ok $test\n";
-$test++;
-
-eval { @- = qw(foo bar); };
-print "not "
-   if $@ !~ /^Modification of a read-only value attempted/;
-print "ok $test\n";
-$test++;
-
-/.(a)(ba*)?/;
-print "#$#-..$#+\nnot " if $#+ != 2 or $#- != 1;
-print "ok $test\n";
-$test++;
-
-$_ = 'aaa';
-pos = 1;
-@a = /\Ga/g;
-print "not " unless "@a" eq "a a";
-print "ok $test\n";
-$test++;
-
-$str = 'abcde';
-pos $str = 2;
-
-print "not " if $str =~ /^\G/;
-print "ok $test\n";
-$test++;
-
-print "not " if $str =~ /^.\G/;
-print "ok $test\n";
-$test++;
-
-print "not " unless $str =~ /^..\G/;
-print "ok $test\n";
-$test++;
-
-print "not " if $str =~ /^...\G/;
-print "ok $test\n";
-$test++;
-
-print "not " unless $str =~ /.\G./ and $& eq 'bc';
-print "ok $test\n";
-$test++;
-
-print "not " unless $str =~ /\G../ and $& eq 'cd';
-print "ok $test\n";
-$test++;
-
-undef $foo; undef $bar;
-print "#'$str','$foo','$bar'\nnot "
-    unless $str =~ /b(?{$foo = $_; $bar = pos})c/
-	and $foo eq 'abcde' and $bar eq 2;
-print "ok $test\n";
-$test++;
-
-undef $foo; undef $bar;
-pos $str = undef;
-print "#'$str','$foo','$bar'\nnot "
-    unless $str =~ /b(?{$foo = $_; $bar = pos})c/g
-	and $foo eq 'abcde' and $bar eq 2 and pos $str eq 3;
-print "ok $test\n";
-$test++;
-
-$_ = $str;
-
-undef $foo; undef $bar;
-print "#'$str','$foo','$bar'\nnot "
-    unless /b(?{$foo = $_; $bar = pos})c/
-	and $foo eq 'abcde' and $bar eq 2;
-print "ok $test\n";
-$test++;
-
-undef $foo; undef $bar;
-print "#'$str','$foo','$bar'\nnot "
-    unless /b(?{$foo = $_; $bar = pos})c/g
-	and $foo eq 'abcde' and $bar eq 2 and pos eq 3;
-print "ok $test\n";
-$test++;
-
-undef $foo; undef $bar;
-pos = undef;
-1 while /b(?{$foo = $_; $bar = pos})c/g;
-print "#'$str','$foo','$bar'\nnot "
-    unless $foo eq 'abcde' and $bar eq 2 and not defined pos;
-print "ok $test\n";
-$test++;
-
-undef $foo; undef $bar;
-$_ = 'abcde|abcde';
-print "#'$str','$foo','$bar','$_'\nnot "
-    unless s/b(?{$foo = $_; $bar = pos})c/x/g and $foo eq 'abcde|abcde'
-	and $bar eq 8 and $_ eq 'axde|axde';
-print "ok $test\n";
-$test++;
-
-@res = ();
-# List context:
-$_ = 'abcde|abcde';
-@dummy = /([ace]).(?{push @res, $1,$2})([ce])(?{push @res, $1,$2})/g;
-@res = map {defined $_ ? "'$_'" : 'undef'} @res;
-$res = "@res";
-print "#'@res' '$_'\nnot "
-    unless "@res" eq "'a' undef 'a' 'c' 'e' undef 'a' undef 'a' 'c'";
-print "ok $test\n";
-$test++;
-
-@res = ();
-@dummy = /([ace]).(?{push @res, $`,$&,$'})([ce])(?{push @res, $`,$&,$'})/g;
-@res = map {defined $_ ? "'$_'" : 'undef'} @res;
-$res = "@res";
-print "#'@res' '$_'\nnot "
-    unless "@res" eq
-  "'' 'ab' 'cde|abcde' " .
-  "'' 'abc' 'de|abcde' " .
-  "'abcd' 'e|' 'abcde' " .
-  "'abcde|' 'ab' 'cde' " .
-  "'abcde|' 'abc' 'de'" ;
-print "ok $test\n";
-$test++;
-
-#Some more \G anchor checks
-$foo='aabbccddeeffgg';
-
-pos($foo)=1;
-
-$foo=~/.\G(..)/g;
-print "not " unless($1 eq 'ab');
-print "ok $test\n";
-$test++;
-
-pos($foo) += 1;
-$foo=~/.\G(..)/g;
-print "not " unless($1 eq 'cc');
-print "ok $test\n";
-$test++;
-
-pos($foo) += 1;
-$foo=~/.\G(..)/g;
-print "not " unless($1 eq 'de');
-print "ok $test\n";
-$test++;
-
-print "not " unless $foo =~ /\Gef/g;
-print "ok $test\n";
-$test++;
-
-undef pos $foo;
-
-$foo=~/\G(..)/g;
-print "not " unless($1  eq 'aa');
-print "ok $test\n";
-$test++;
-
-$foo=~/\G(..)/g;
-print "not " unless($1  eq 'bb');
-print "ok $test\n";
-$test++;
-
-pos($foo)=5;
-$foo=~/\G(..)/g;
-print "not " unless($1  eq 'cd');
-print "ok $test\n";
-$test++;
-
-$_='123x123';
-@res = /(\d*|x)/g;
-print "not " unless('123||x|123|' eq join '|', @res);
-print "ok $test\n";
-$test++;
-
-# see if matching against temporaries (created via pp_helem()) is safe
-{ foo => "ok $test\n".$^X }->{foo} =~ /^(.*)\n/g;
-print "$1\n";
-$test++;
-
-# See if $i work inside (?{}) in the presense of saved substrings and
-# changing $_
-@a = qw(foo bar);
-@b = ();
-s/(\w)(?{push @b, $1})/,$1,/g for @a;
-
-print "# \@b='@b', expect 'f o o b a r'\nnot " unless("@b" eq "f o o b a r");
-print "ok $test\n";
-$test++;
-
-print "not " unless("@a" eq ",f,,o,,o, ,b,,a,,r,");
-print "ok $test\n";
-$test++;
-
-$brackets = qr{
-	         {  (?> [^{}]+ | (??{ $brackets }) )* }
-	      }x;
-
-"{{}" =~ $brackets;
-print "ok $test\n";		# Did we survive?
-$test++;
-
-"something { long { and } hairy" =~ $brackets;
-print "ok $test\n";		# Did we survive?
-$test++;
-
-"something { long { and } hairy" =~ m/((??{ $brackets }))/;
-print "not " unless $1 eq "{ and }";
-print "ok $test\n";
-$test++;
-
-$_ = "a-a\nxbb";
-pos=1;
-m/^-.*bb/mg and print "not ";
-print "ok $test\n";
-$test++;
-
-$text = "aaXbXcc";
-pos($text)=0;
-$text =~ /\GXb*X/g and print 'not ';
-print "ok $test\n";
-$test++;
-
-$text = "xA\n" x 500;
-$text =~ /^\s*A/m and print 'not ';
-print "ok $test\n";
-$test++;
-
-$text = "abc dbf";
-@res = ($text =~ /.*?(b).*?\b/g);
-"@res" eq 'b b' or print 'not ';
-print "ok $test\n";
-$test++;
-
-@a = map chr,0..255;
-
-@b = grep(/\S/,@a);
-@c = grep(/[^\s]/,@a);
-print "not " if "@b" ne "@c";
-print "ok $test\n";
-$test++;
-
-@b = grep(/\S/,@a);
-@c = grep(/[\S]/,@a);
-print "not " if "@b" ne "@c";
-print "ok $test\n";
-$test++;
-
-@b = grep(/\s/,@a);
-@c = grep(/[^\S]/,@a);
-print "not " if "@b" ne "@c";
-print "ok $test\n";
-$test++;
-
-@b = grep(/\s/,@a);
-@c = grep(/[\s]/,@a);
-print "not " if "@b" ne "@c";
-print "ok $test\n";
-$test++;
-
-@b = grep(/\D/,@a);
-@c = grep(/[^\d]/,@a);
-print "not " if "@b" ne "@c";
-print "ok $test\n";
-$test++;
-
-@b = grep(/\D/,@a);
-@c = grep(/[\D]/,@a);
-print "not " if "@b" ne "@c";
-print "ok $test\n";
-$test++;
-
-@b = grep(/\d/,@a);
-@c = grep(/[^\D]/,@a);
-print "not " if "@b" ne "@c";
-print "ok $test\n";
-$test++;
-
-@b = grep(/\d/,@a);
-@c = grep(/[\d]/,@a);
-print "not " if "@b" ne "@c";
-print "ok $test\n";
-$test++;
-
-@b = grep(/\W/,@a);
-@c = grep(/[^\w]/,@a);
-print "not " if "@b" ne "@c";
-print "ok $test\n";
-$test++;
-
-@b = grep(/\W/,@a);
-@c = grep(/[\W]/,@a);
-print "not " if "@b" ne "@c";
-print "ok $test\n";
-$test++;
-
-@b = grep(/\w/,@a);
-@c = grep(/[^\W]/,@a);
-print "not " if "@b" ne "@c";
-print "ok $test\n";
-$test++;
-
-@b = grep(/\w/,@a);
-@c = grep(/[\w]/,@a);
-print "not " if "@b" ne "@c";
-print "ok $test\n";
-$test++;
-
-# see if backtracking optimization works correctly
-"\n\n" =~ /\n  $ \n/x or print "not ";
-print "ok $test\n";
-$test++;
-
-"\n\n" =~ /\n* $ \n/x or print "not ";
-print "ok $test\n";
-$test++;
-
-"\n\n" =~ /\n+ $ \n/x or print "not ";
-print "ok $test\n";
-$test++;
-
-[] =~ /^ARRAY/ or print "# [] \nnot ";
-print "ok $test\n";
-$test++;
-
-eval << 'EOE';
-{
- package S;
- use overload '""' => sub { 'Object S' };
- sub new { bless [] }
-}
-$a = 'S'->new;
-EOE
-
-$a and $a =~ /^Object\sS/ or print "# '$a' \nnot ";
-print "ok $test\n";
-$test++;
-
-# test result of match used as match (!)
-'a1b' =~ ('xyz' =~ /y/) and $` eq 'a' or print "not ";
-print "ok $test\n";
-$test++;
-
-'a1b' =~ ('xyz' =~ /t/) and $` eq 'a' or print "not ";
-print "ok $test\n";
-$test++;
-
-$w = 0;
-{
-    local $SIG{__WARN__} = sub { $w = 1 };
-    local $^W = 1;
-	$w = 1 if ("1\n" x 102) =~ /^\s*\n/m;
-}
-print $w ? "not " : "", "ok $test\n";
-$test++;
-
-my %space = ( spc   => " ",
-	      tab   => "\t",
-	      cr    => "\r",
-	      lf    => "\n",
-	      ff    => "\f",
-# There's no \v but the vertical tabulator seems miraculously
-# be 11 both in ASCII and EBCDIC.
-	      vt    => chr(11),
-	      false => "space" );
-
-my @space0 = sort grep { $space{$_} =~ /\s/ }          keys %space;
-my @space1 = sort grep { $space{$_} =~ /[[:space:]]/ } keys %space;
-my @space2 = sort grep { $space{$_} =~ /[[:blank:]]/ } keys %space;
-
-print "not " unless "@space0" eq "cr ff lf spc tab";
-print "ok $test # @space0\n";
-$test++;
-
-print "not " unless "@space1" eq "cr ff lf spc tab vt";
-print "ok $test # @space1\n";
-$test++;
-
-print "not " unless "@space2" eq "spc tab";
-print "ok $test # @space2\n";
-$test++;
-
-# bugid 20001021.005 - this caused a SEGV
-print "not " unless undef =~ /^([^\/]*)(.*)$/;
-print "ok $test\n";
-$test++;
-
-# bugid 20000731.001
-
-print "not " unless "A \x{263a} B z C" =~ /A . B (??{ "z" }) C/;
-print "ok $test\n";
-$test++;
-
-my $ordA = ord('A');
-
-$_ = "a\x{100}b";
-if (/(.)(\C)(\C)(.)/) {
-  print "ok 232\n";
-  if ($1 eq "a") {
-    print "ok 233\n";
-  } else {
-    print "not ok 233\n";
-  }
-  if ($ordA == 65) { # ASCII (or equivalent), should be UTF-8
-      if ($2 eq "\xC4") {
-	  print "ok 234\n";
-      } else {
-	  print "not ok 234\n";
-      }
-      if ($3 eq "\x80") {
-	  print "ok 235\n";
-      } else {
-	  print "not ok 235\n";
-      }
-  } elsif ($ordA == 193) { # EBCDIC (or equivalent), should be UTF-EBCDIC
-      if ($2 eq "\x8C") {
-	  print "ok 234\n";
-      } else {
-	  print "not ok 234\n";
-      }
-      if ($3 eq "\x41") {
-	  print "ok 235\n";
-      } else {
-	  print "not ok 235\n";
-      }
-  } else {
-      for (234..235) {
-	  print "not ok $_ # ord('A') == $ordA\n";
-      }
-  }
-  if ($4 eq "b") {
-    print "ok 236\n";
-  } else {
-    print "not ok 236\n";
-  }
-} else {
-  for (232..236) {
-    print "not ok $_\n";
-  }
-}
-$_ = "\x{100}";
-if (/(\C)/g) {
-  print "ok 237\n";
-  # currently \C are still tagged as UTF-8
-  if ($ordA == 65) {
-      if ($1 eq "\xC4") {
-	  print "ok 238\n";
-      } else {
-	  print "not ok 238\n";
-      }
-  } elsif ($ordA == 193) {
-      if ($1 eq "\x8C") {
-	  print "ok 238\n";
-      } else {
-	  print "not ok 238\n";
-      }
-  } else {
-      print "not ok 238 # ord('A') == $ordA\n";
-  }
-} else {
-  for (237..238) {
-    print "not ok $_\n";
-  }
-}
-if (/(\C)/g) {
-  print "ok 239\n";
-  # currently \C are still tagged as UTF-8
-  if ($ordA == 65) {
-      if ($1 eq "\x80") {
-	  print "ok 240\n";
-      } else {
-	  print "not ok 240\n";
-      }
-  } elsif ($ordA == 193) {
-      if ($1 eq "\x41") {
-	  print "ok 240\n";
-      } else {
-	  print "not ok 240\n";
-      }
-  } else {
-      print "not ok 240 # ord('A') == $ordA\n";
-  }
-} else {
-  for (239..240) {
-    print "not ok $_\n";
-  }
-}
+    {
+        # used to be a test for $*
+        ok "ab\ncd\n" =~ /^cd/m, qq ["ab\ncd\n" =~ /^cd/m];
+    }
 
-{
-  # japhy -- added 03/03/2001
-  () = (my $str = "abc") =~ /(...)/;
-  $str = "def";
-  print "not " if $1 ne "abc";
-  print "ok 241\n";
-}
+    {
+        our %XXX = map {($_ => $_)} 123, 234, 345;
+
+        our @XXX = ('ok 1','not ok 1', 'ok 2','not ok 2','not ok 3');
+        while ($_ = shift(@XXX)) {
+            my $f = index ($_, 'not') >= 0 ? \&nok : \&ok;
+            my $r = ?(.*)?;
+            &$f ($r, "?(.*)?");
+            /not/ && reset;
+            if (/not ok 2/) {
+                if ($^O eq 'VMS') {
+                    $_ = shift(@XXX);
+                }
+                else {
+                    reset 'X';
+                }
+            }
+        }
+
+        SKIP: {
+            if ($^O eq 'VMS') {
+                skip "Reset 'X'", 1;
+            }
+            ok !keys %XXX, "%XXX is empty";
+        }
 
-# The 242 and 243 go with the 244 and 245.
-# The trick is that in EBCDIC the explicit numeric range should match
-# (as also in non-EBCDIC) but the explicit alphabetic range should not match.
+    }
 
-if ("\x8e" =~ /[\x89-\x91]/) {
-  print "ok 242\n";
-} else {
-  print "not ok 242\n";
-}
+    {
+        local $Message = "Test empty pattern";
+        my $xyz = 'xyz';
+        my $cde = 'cde';
+
+        $cde =~ /[^ab]*/;
+        $xyz =~ //;
+        iseq $&, $xyz;
+
+        my $foo = '[^ab]*';
+        $cde =~ /$foo/;
+        $xyz =~ //;
+        iseq $&, $xyz;
+
+        $cde =~ /$foo/;
+        my $null;
+        no warnings 'uninitialized';
+        $xyz =~ /$null/;
+        iseq $&, $xyz;
+
+        $null = "";
+        $xyz =~ /$null/;
+        iseq $&, $xyz;
+    }
 
-if ("\xce" =~ /[\xc9-\xd1]/) {
-  print "ok 243\n";
-} else {
-  print "not ok 243\n";
-}
+    {
+        local $Message = q !Check $`, $&, $'!;
+        $_ = 'abcdefghi';
+        /def/;		# optimized up to cmd
+        iseq "$`:$&:$'", 'abc:def:ghi';
 
-# In most places these tests would succeed since \x8e does not
-# in most character sets match 'i' or 'j' nor would \xce match
-# 'I' or 'J', but strictly speaking these tests are here for
-# the good of EBCDIC, so let's test these only there.
-if (ord('i') == 0x89 && ord('J') == 0xd1) { # EBCDIC
-  if ("\x8e" !~ /[i-j]/) {
-    print "ok 244\n";
-  } else {
-    print "not ok 244\n";
-  }
-  if ("\xce" !~ /[I-J]/) {
-    print "ok 245\n";
-  } else {
-    print "not ok 245\n";
-  }
-} else {
-  for (244..245) {
-    print "ok $_ # Skip: only in EBCDIC\n";
-  }
-}
+        no warnings 'void';
+        /cde/ + 0;	# optimized only to spat
+        iseq "$`:$&:$'", 'ab:cde:fghi';
 
-print "not " unless "\x{ab}" =~ /\x{ab}/;
-print "ok 246\n";
+        /[d][e][f]/;	# not optimized
+        iseq "$`:$&:$'", 'abc:def:ghi';
+    }
 
-print "not " unless "\x{abcd}" =~ /\x{abcd}/;
-print "ok 247\n";
+    {
+        $_ = 'now is the {time for all} good men to come to.';
+        / {([^}]*)}/;
+        iseq $1, 'time for all', "Match braces";
+    }
 
-{
-    # bug id 20001008.001
+    {
+        local $Message = "{N,M} quantifier";
+        $_ = 'xxx {3,4}  yyy   zzz';
+        ok /( {3,4})/;
+        iseq $1, '   ';
+        ok !/( {4,})/;
+        ok /( {2,3}.)/;
+        iseq $1, '  y';
+        ok /(y{2,3}.)/;
+        iseq $1, 'yyy ';
+        ok !/x {3,4}/;
+        ok !/^xxx {3,4}/;
+    }
 
-    my $test = 248;
-    my @x = ("stra\337e 138","stra\337e 138");
-    for (@x) {
-	s/(\d+)\s*([\w\-]+)/$1 . uc $2/e;
-	my($latin) = /^(.+)(?:\s+\d)/;
-	print $latin eq "stra\337e" ? "ok $test\n" :	# 248,249
-	    "#latin[$latin]\nnot ok $test\n";
-	$test++;
-	$latin =~ s/stra\337e/straße/; # \303\237 after the 2nd a
-	use utf8; # needed for the raw UTF-8
-	$latin =~ s!(s)tr(?:aß|s+e)!$1tr.!; # \303\237 after the a
+    {
+        local $Message = "Test /g";
+        local $" = ":";
+        $_ = "now is the time for all good men to come to.";
+        my @words = /(\w+)/g;
+        my $exp   = "now:is:the:time:for:all:good:men:to:come:to";
+
+        iseq "@words", $exp;
+
+        @words = ();
+        while (/\w+/g) {
+            push (@words, $&);
+        }
+        iseq "@words", $exp;
+
+        @words = ();
+        pos = 0;
+        while (/to/g) {
+            push(@words, $&);
+        }
+        iseq "@words", "to:to";
+
+        pos $_ = 0;
+        @words = /to/g;
+        iseq "@words", "to:to";
     }
-}
 
-{
-    print "not " unless "ba\xd4c" =~ /([a\xd4]+)/ && $1 eq "a\xd4";
-    print "ok 250\n";
+    {
+        $_ = "abcdefghi";
+
+        my $pat1 = 'def';
+        my $pat2 = '^def';
+        my $pat3 = '.def.';
+        my $pat4 = 'abc';
+        my $pat5 = '^abc';
+        my $pat6 = 'abc$';
+        my $pat7 = 'ghi';
+        my $pat8 = '\w*ghi';
+        my $pat9 = 'ghi$';
+
+        my $t1 = my $t2 = my $t3 = my $t4 = my $t5 =
+        my $t6 = my $t7 = my $t8 = my $t9 = 0;
+
+        for my $iter (1 .. 5) {
+            $t1++ if /$pat1/o;
+            $t2++ if /$pat2/o;
+            $t3++ if /$pat3/o;
+            $t4++ if /$pat4/o;
+            $t5++ if /$pat5/o;
+            $t6++ if /$pat6/o;
+            $t7++ if /$pat7/o;
+            $t8++ if /$pat8/o;
+            $t9++ if /$pat9/o;
+        }
+        my $x = "$t1$t2$t3$t4$t5$t6$t7$t8$t9";
+        iseq $x, '505550555', "Test /o";
+    }
 
-    print "not " unless "ba\xd4c" =~ /([a\xd4]+)/ && $1 eq "a\x{d4}";
-    print "ok 251\n";
 
-    print "not " unless "ba\x{d4}c" =~ /([a\xd4]+)/ && $1 eq "a\x{d4}";
-    print "ok 252\n";
+    SKIP: {
+        my $xyz = 'xyz';
+        ok "abc" =~ /^abc$|$xyz/, "| after \$";
 
-    print "not " unless "ba\x{d4}c" =~ /([a\xd4]+)/ && $1 eq "a\xd4";
-    print "ok 253\n";
+        # perl 4.009 says "unmatched ()"
+        local $Message = '$ inside ()';
 
-    print "not " unless "ba\xd4c" =~ /([a\x{d4}]+)/ && $1 eq "a\xd4";
-    print "ok 254\n";
+        my $result;
+        eval '"abc" =~ /a(bc$)|$xyz/; $result = "$&:$1"';
+        iseq $@, "" or skip "eval failed", 1;
+        iseq $result, "abc:bc";
+    }
 
-    print "not " unless "ba\xd4c" =~ /([a\x{d4}]+)/ && $1 eq "a\x{d4}";
-    print "ok 255\n";
 
-    print "not " unless "ba\x{d4}c" =~ /([a\x{d4}]+)/ && $1 eq "a\x{d4}";
-    print "ok 256\n";
+    {
+        local $Message = "Scalar /g";
+        $_ = "abcfooabcbar";
+
+        ok  /abc/g && $` eq "";
+        ok  /abc/g && $` eq "abcfoo";
+        ok !/abc/g;
+
+        local $Message = "Scalar /gi";
+        pos = 0;
+        ok  /ABC/gi && $` eq "";
+        ok  /ABC/gi && $` eq "abcfoo";
+        ok !/ABC/gi;
+
+        local $Message = "Scalar /g";
+        pos = 0;
+        ok  /abc/g && $' eq "fooabcbar";
+        ok  /abc/g && $' eq "bar";
+
+        $_ .= '';
+        my @x = /abc/g;
+        iseq @x, 2, "/g reset after assignment";
+    }
 
-    print "not " unless "ba\x{d4}c" =~ /([a\x{d4}]+)/ && $1 eq "a\xd4";
-    print "ok 257\n";
-}
+    {
+        local $Message = '/g, \G and pos';
+        $_ = "abdc";
+        pos $_ = 2;
+        /\Gc/gc;
+        iseq pos $_, 2;
+        /\Gc/g;
+        ok !defined pos $_;
+    }
 
-{
-    # the first half of 20001028.003
+    {
+        local $Message = '(?{ })';
+        our $out = 1;
+        'abc' =~ m'a(?{ $out = 2 })b';
+        iseq $out, 2;
+
+        $out = 1;
+        'abc' =~ m'a(?{ $out = 3 })c';
+        iseq $out, 1;
+    }
 
-    my $X = chr(1448);
-    my ($Y) = $X =~ /(.*)/;
-    print "not " unless $Y eq v1448 && length($Y) == 1;
-    print "ok 258\n";
-}
 
-{
-    # 20001108.001
+    {
+        $_ = 'foobar1 bar2 foobar3 barfoobar5 foobar6';
+        my @out = /(?<!foo)bar./g;
+        iseq "@out", 'bar2 barf', "Negative lookbehind";
+    }
 
-    my $X = "Szab\x{f3},Bal\x{e1}zs";
-    my $Y = $X;
-    $Y =~ s/(B)/$1/ for 0..3;
-    print "not " unless $Y eq $X && $X eq "Szab\x{f3},Bal\x{e1}zs";
-    print "ok 259\n";
-}
+    {
+        local $Message = "REG_INFTY tests";
+        # Tests which depend on REG_INFTY
+        $::reg_infty   = $Config {reg_infty} // 32767;
+        $::reg_infty_m = $::reg_infty - 1;
+        $::reg_infty_p = $::reg_infty + 1;
+        $::reg_infty_m = $::reg_infty_m;   # Surpress warning.
+
+        # As well as failing if the pattern matches do unexpected things, the
+        # next three tests will fail if you should have picked up a lower-than-
+        # default value for $reg_infty from Config.pm, but have not.
+
+        eval_ok q (('aaa' =~ /(a{1,$::reg_infty_m})/)[0] eq 'aaa');
+        eval_ok q (('a' x $::reg_infty_m) =~ /a{$::reg_infty_m}/);
+        eval_ok q (('a' x ($::reg_infty_m - 1)) !~ /a{$::reg_infty_m}/);
+        eval "'aaa' =~ /a{1,$::reg_infty}/";
+        ok $@ =~ /^\QQuantifier in {,} bigger than/;
+        eval "'aaa' =~ /a{1,$::reg_infty_p}/";
+        ok $@ =~ /^\QQuantifier in {,} bigger than/;
+    }
 
-{
-    # the second half of 20001028.003
+    {
+        # Poke a couple more parse failures
+        my $context = 'x' x 256;
+        eval qq("${context}y" =~ /(?<=$context)y/);
+        ok $@ =~ /^\QLookbehind longer than 255 not/, "Lookbehind limit";
+    }
 
-    my $X = '';
-    $X =~ s/^/chr(1488)/e;
-    print "not " unless length $X == 1 && ord($X) == 1488;
-    print "ok 260\n";
-}
+    {
+        # Long Monsters
+        local $Message = "Long monster";
+        for my $l (125, 140, 250, 270, 300000, 30) { # Ordered to free memory
+            my $a = 'a' x $l;
+            local $Error = "length = $l";
+             ok "ba$a=" =~ /a$a=/;
+            nok "b$a="  =~ /a$a=/;
+             ok "b$a="  =~ /ba+=/;
+
+             ok "ba$a=" =~ /b(?:a|b)+=/;
+        }
+    }
 
-{
-    # 20000517.001
 
-    my $x = "\x{100}A";
+    {
+        # 20000 nodes, each taking 3 words per string, and 1 per branch
+        my $long_constant_len = join '|', 12120 .. 32645;
+        my $long_var_len = join '|', 8120 .. 28645;
+        my %ans = ( 'ax13876y25677lbc' => 1,
+                    'ax13876y25677mcb' => 0, # not b.
+                    'ax13876y35677nbc' => 0, # Num too big
+                    'ax13876y25677y21378obc' => 1,
+                    'ax13876y25677y21378zbc' => 0,	# Not followed by [k-o]
+                    'ax13876y25677y21378y21378kbc' => 1,
+                    'ax13876y25677y21378y21378kcb' => 0, # Not b.
+                    'ax13876y25677y21378y21378y21378kbc' => 0, # 5 runs
+                  );
+
+        local $Message = "20000 nodes";
+        for (keys %ans) {
+            local $Error = "const-len '$_'";
+            ok !($ans{$_} xor /a(?=([yx]($long_constant_len)){2,4}[k-o]).*b./o);
+
+            local $Error = "var-len '$_'";
+            ok !($ans{$_} xor /a(?=([yx]($long_var_len)){2,4}[k-o]).*b./o);
+        }
+    }
 
-    $x =~ s/A/B/;
+    {
+        local $Message = "Complicated backtracking";
+        $_ = " a (bla()) and x(y b((l)u((e))) and b(l(e)e)e";
+        my $expect = "(bla()) ((l)u((e))) (l(e)e)";
+
+        use vars '$c';
+        sub matchit {
+          m/
+             (
+               \(
+               (?{ $c = 1 })	# Initialize
+               (?:
+                 (?(?{ $c == 0 })   # PREVIOUS iteration was OK, stop the loop
+                   (?!
+                   )		# Fail: will unwind one iteration back
+                 )	
+                 (?:
+                   [^()]+		# Match a big chunk
+                   (?=
+                     [()]
+                   )		# Do not try to match subchunks
+                 |
+                   \(
+                   (?{ ++$c })
+                 |
+                   \)
+                   (?{ --$c })
+                 )
+               )+		# This may not match with different subblocks
+             )
+             (?(?{ $c != 0 })
+               (?!
+               )		# Fail
+             )			# Otherwise the chunk 1 may succeed with $c>0
+           /xg;
+        }
+
+        my @ans = ();
+        my $res;
+        push @ans, $res while $res = matchit;
+        iseq "@ans", "1 1 1";
+
+        @ans = matchit;
+        iseq "@ans", $expect;
+
+        local $Message = "Recursion with (??{ })";
+        our $matched;
+        $matched = qr/\((?:(?>[^()]+)|(??{$matched}))*\)/;
+
+        @ans = my @ans1 = ();
+        push (@ans, $res), push (@ans1, $&) while $res = m/$matched/g;
+
+        iseq "@ans", "1 1 1";
+        iseq "@ans1", $expect;
+
+        @ans = m/$matched/g;
+        iseq "@ans", $expect;
 
-    print "not " unless $x eq "\x{100}B" && length($x) == 2;
-    print "ok 261\n";
-}
+    }
 
-{
-    # bug id 20001230.002
+    {
+        ok "abc" =~ /^(??{"a"})b/, '"abc" =~ /^(??{"a"})b/';
+    }
 
-    print "not " unless "École" =~ /^\C\C(.)/ && $1 eq 'c';
-    print "ok 262\n";
+    {
+        my @ans = ('a/b' =~ m%(.*/)?(.*)%);	# Stack may be bad
+        iseq "@ans", 'a/ b', "Stack may be bad";
+    }
 
-    print "not " unless "École" =~ /^\C\C(c)/;
-    print "ok 263\n";
-}
+    {
+        local $Message = "Eval-group not allowed at runtime";
+        my $code = '{$blah = 45}';
+        our $blah = 12;
+        eval { /(?$code)/ };
+        ok $@ && $@ =~ /not allowed at runtime/ && $blah == 12;
+
+        for $code ('{$blah = 45}','=xx') {
+            $blah = 12;
+            my $res = eval { "xx" =~ /(?$code)/o };
+            no warnings 'uninitialized';
+            local $Error = "'$@', '$res', '$blah'";
+            if ($code eq '=xx') {
+                ok !$@ && $res;
+            }
+            else {
+                ok $@ && $@ =~ /not allowed at runtime/ && $blah == 12;
+            }
+        }
+
+        $code = '{$blah = 45}';
+        $blah = 12;
+        eval "/(?$code)/";
+        iseq $blah, 45;
+
+        $blah = 12;
+        /(?{$blah = 45})/;
+        iseq $blah, 45;
+    }
 
-SKIP: {
-    my $test = 264; # till 575
-
-    use charnames ":full";
-
-    # This is far from complete testing, there are dozens of character
-    # classes in Unicode.  The mixing of literals and \N{...} is
-    # intentional so that in non-Latin-1 places we test the native
-    # characters, not the Unicode code points.
-
-    my %s = (
-	     "a" 				=> 'Ll',
-	     "\N{CYRILLIC SMALL LETTER A}"	=> 'Ll',
-	     "A" 				=> 'Lu',
-	     "\N{GREEK CAPITAL LETTER ALPHA}"	=> 'Lu',
-	     "\N{HIRAGANA LETTER SMALL A}"	=> 'Lo',
-	     "\N{COMBINING GRAVE ACCENT}"	=> 'Mn',
-	     "0"				=> 'Nd',
-	     "\N{ARABIC-INDIC DIGIT ZERO}"	=> 'Nd',
-	     "_"				=> 'N',
-	     "!"				=> 'P',
-	     " "				=> 'Zs',
-	     "\0"				=> 'Cc',
-	     );
-	
-    for my $char (map { s/^\S+ //; $_ }
-                    sort map { sprintf("%06x", ord($_))." $_" } keys %s) {
-	my $class = $s{$char};
-	my $code  = sprintf("%06x", ord($char));
-	printf "#\n# 0x$code\n#\n";
-	print "# IsAlpha\n";
-	if ($class =~ /^[LM]/) {
-	    print "not " unless $char =~ /\p{IsAlpha}/;
-	    print "ok $test\n"; $test++;
-	    print "not " if     $char =~ /\P{IsAlpha}/;
-	    print "ok $test\n"; $test++;
-	} else {
-	    print "not " if     $char =~ /\p{IsAlpha}/;
-	    print "ok $test\n"; $test++;
-	    print "not " unless $char =~ /\P{IsAlpha}/;
-	    print "ok $test\n"; $test++;
-	}
-	print "# IsAlnum\n";
-	if ($class =~ /^[LMN]/ && $char ne "_") {
-	    print "not " unless $char =~ /\p{IsAlnum}/;
-	    print "ok $test\n"; $test++;
-	    print "not " if     $char =~ /\P{IsAlnum}/;
-	    print "ok $test\n"; $test++;
-	} else {
-	    print "not " if     $char =~ /\p{IsAlnum}/;
-	    print "ok $test\n"; $test++;
-	    print "not " unless $char =~ /\P{IsAlnum}/;
-	    print "ok $test\n"; $test++;
-	}
-	print "# IsASCII\n";
-	if (ord("A") == 193) {
-	    print "ok $test # Skip: in EBCDIC\n"; $test++;
-	    print "ok $test # Skip: in EBCDIC\n"; $test++;
-	} else {
-	    if ($code le '00007f') {
-		print "not " unless $char =~ /\p{IsASCII}/;
-		print "ok $test\n"; $test++;
-		print "not " if     $char =~ /\P{IsASCII}/;
-		print "ok $test\n"; $test++;
-	    } else {
-		print "not " if     $char =~ /\p{IsASCII}/;
-		print "ok $test\n"; $test++;
-		print "not " unless $char =~ /\P{IsASCII}/;
-		print "ok $test\n"; $test++;
-	    }
-	}
-	print "# IsCntrl\n";
-	if ($class =~ /^C/) {
-	    print "not " unless $char =~ /\p{IsCntrl}/;
-	    print "ok $test\n"; $test++;
-	    print "not " if     $char =~ /\P{IsCntrl}/;
-	    print "ok $test\n"; $test++;
-	} else {
-	    print "not " if     $char =~ /\p{IsCntrl}/;
-	    print "ok $test\n"; $test++;
-	    print "not " unless $char =~ /\P{IsCntrl}/;
-	    print "ok $test\n"; $test++;
-	}
-	print "# IsBlank\n";
-	if ($class =~ /^Z[lp]/ || $char eq " ") {
-	    print "not " unless $char =~ /\p{IsBlank}/;
-	    print "ok $test\n"; $test++;
-	    print "not " if     $char =~ /\P{IsBlank}/;
-	    print "ok $test\n"; $test++;
-	} else {
-	    print "not " if     $char =~ /\p{IsBlank}/;
-	    print "ok $test\n"; $test++;
-	    print "not " unless $char =~ /\P{IsBlank}/;
-	    print "ok $test\n"; $test++;
-	}
-	print "# IsDigit\n";
-	if ($class =~ /^Nd$/) {
-	    print "not " unless $char =~ /\p{IsDigit}/;
-	    print "ok $test\n"; $test++;
-	    print "not " if     $char =~ /\P{IsDigit}/;
-	    print "ok $test\n"; $test++;
-	} else {
-	    print "not " if     $char =~ /\p{IsDigit}/;
-	    print "ok $test\n"; $test++;
-	    print "not " unless $char =~ /\P{IsDigit}/;
-	    print "ok $test\n"; $test++;
-	}
-	print "# IsGraph\n";
-	if ($class =~ /^([LMNPS])|Co/) {
-	    print "not " unless $char =~ /\p{IsGraph}/;
-	    print "ok $test\n"; $test++;
-	    print "not " if     $char =~ /\P{IsGraph}/;
-	    print "ok $test\n"; $test++;
-	} else {
-	    print "not " if     $char =~ /\p{IsGraph}/;
-	    print "ok $test\n"; $test++;
-	    print "not " unless $char =~ /\P{IsGraph}/;
-	    print "ok $test\n"; $test++;
-	}
-	print "# IsLower\n";
-	if ($class =~ /^Ll$/) {
-	    print "not " unless $char =~ /\p{IsLower}/;
-	    print "ok $test\n"; $test++;
-	    print "not " if     $char =~ /\P{IsLower}/;
-	    print "ok $test\n"; $test++;
-	} else {
-	    print "not " if     $char =~ /\p{IsLower}/;
-	    print "ok $test\n"; $test++;
-	    print "not " unless $char =~ /\P{IsLower}/;
-	    print "ok $test\n"; $test++;
-	}
-	print "# IsPrint\n";
-	if ($class =~ /^([LMNPS])|Co|Zs/) {
-	    print "not " unless $char =~ /\p{IsPrint}/;
-	    print "ok $test\n"; $test++;
-	    print "not " if     $char =~ /\P{IsPrint}/;
-	    print "ok $test\n"; $test++;
-	} else {
-	    print "not " if     $char =~ /\p{IsPrint}/;
-	    print "ok $test\n"; $test++;
-	    print "not " unless $char =~ /\P{IsPrint}/;
-	    print "ok $test\n"; $test++;
-	}
-	print "# IsPunct\n";
-	if ($class =~ /^P/ || $char eq "_") {
-	    print "not " unless $char =~ /\p{IsPunct}/;
-	    print "ok $test\n"; $test++;
-	    print "not " if     $char =~ /\P{IsPunct}/;
-	    print "ok $test\n"; $test++;
-	} else {
-	    print "not " if     $char =~ /\p{IsPunct}/;
-	    print "ok $test\n"; $test++;
-	    print "not " unless $char =~ /\P{IsPunct}/;
-	    print "ok $test\n"; $test++;
-	}
-	print "# IsSpace\n";
-	if ($class =~ /^Z/ || ($code =~ /^(0009|000A|000B|000C|000D)$/)) {
-	    print "not " unless $char =~ /\p{IsSpace}/;
-	    print "ok $test\n"; $test++;
-	    print "not " if     $char =~ /\P{IsSpace}/;
-	    print "ok $test\n"; $test++;
-	} else {
-	    print "not " if     $char =~ /\p{IsSpace}/;
-	    print "ok $test\n"; $test++;
-	    print "not " unless $char =~ /\P{IsSpace}/;
-	    print "ok $test\n"; $test++;
-	}
-	print "# IsUpper\n";
-	if ($class =~ /^L[ut]/) {
-	    print "not " unless $char =~ /\p{IsUpper}/;
-	    print "ok $test\n"; $test++;
-	    print "not " if     $char =~ /\P{IsUpper}/;
-	    print "ok $test\n"; $test++;
-	} else {
-	    print "not " if     $char =~ /\p{IsUpper}/;
-	    print "ok $test\n"; $test++;
-	    print "not " unless $char =~ /\P{IsUpper}/;
-	    print "ok $test\n"; $test++;
-	}
-	print "# IsWord\n";
-	if ($class =~ /^[LMN]/ || $char eq "_") {
-	    print "not " unless $char =~ /\p{IsWord}/;
-	    print "ok $test\n"; $test++;
-	    print "not " if     $char =~ /\P{IsWord}/;
-	    print "ok $test\n"; $test++;
-	} else {
-	    print "not " if     $char =~ /\p{IsWord}/;
-	    print "ok $test\n"; $test++;
-	    print "not " unless $char =~ /\P{IsWord}/;
-	    print "ok $test\n"; $test++;
-	}
+    {
+        local $Message = "Pos checks";
+        my $x = 'banana';
+        $x =~ /.a/g;
+        iseq pos ($x), 2;
+
+        $x =~ /.z/gc;
+        iseq pos ($x), 2;
+
+        sub f {
+            my $p = $_[0];
+            return $p;
+        }
+
+        $x =~ /.a/g;
+        iseq f (pos ($x)), 4;
     }
-}
 
-{
-    $_ = "abc\x{100}\x{200}\x{300}\x{380}\x{400}defg";
+    {
+        local $Message = 'Checking $^R';
+        our $x = $^R = 67;
+        'foot' =~ /foo(?{$x = 12; 75})[t]/;
+        iseq $^R, 75;
+
+        $x = $^R = 67;
+        'foot' =~ /foo(?{$x = 12; 75})[xy]/;
+        ok $^R eq '67' && $x eq '12';
+
+        $x = $^R = 67;
+        'foot' =~ /foo(?{ $^R + 12 })((?{ $x = 12; $^R + 17 })[xy])?/;
+        ok $^R eq '79' && $x eq '12';
+    }
 
-    if (/(.\x{300})./) {
-	print "ok 576\n";
+    {
+        iseq qr/\b\v$/i,    '(?i-xsm:\b\v$)', 'qr/\b\v$/i';
+        iseq qr/\b\v$/s,    '(?s-xim:\b\v$)', 'qr/\b\v$/s';
+        iseq qr/\b\v$/m,    '(?m-xis:\b\v$)', 'qr/\b\v$/m';
+        iseq qr/\b\v$/x,    '(?x-ism:\b\v$)', 'qr/\b\v$/x';
+        iseq qr/\b\v$/xism, '(?msix:\b\v$)',  'qr/\b\v$/xism';
+        iseq qr/\b\v$/,     '(?-xism:\b\v$)', 'qr/\b\v$/';
+    }
 
-	print "not " unless $` eq "abc\x{100}" && length($`) == 4;
-	print "ok 577\n";
 
-	print "not " unless $& eq "\x{200}\x{300}\x{380}" && length($&) == 3;
-	print "ok 578\n";
+    {
+        local $Message = "Look around";
+        $_ = 'xabcx';
+      SKIP:
+        foreach my $ans ('', 'c') {
+            ok /(?<=(?=a)..)((?=c)|.)/g or skip "Match failed", 1;
+            iseq $1, $ans;
+        }
+    }
 
-	print "not " unless $' eq "\x{400}defg" && length($') == 5;
-	print "ok 579\n";
+    {
+        local $Message = "Empty clause";
+        $_ = 'a';
+        foreach my $ans ('', 'a', '') {
+            ok /^|a|$/g or skip "Match failed", 1;
+            iseq $&, $ans;
+        }
+    }
 
-	print "not " unless $1 eq "\x{200}\x{300}" && length($1) == 2;
-	print "ok 580\n";
-    } else {
-	for (576..580) { print "not ok $_\n" }
+    {
+        local $Message = "Prefixify";
+        sub prefixify {
+            SKIP: {
+                my ($v, $a, $b, $res) = @_;
+                ok $v =~ s/\Q$a\E/$b/ or skip "Match failed", 1;
+                iseq $v, $res;
+            }
+        }
+
+        prefixify ('/a/b/lib/arch', "/a/b/lib", 'X/lib', 'X/lib/arch');
+        prefixify ('/a/b/man/arch', "/a/b/man", 'X/man', 'X/man/arch');
     }
-}
 
-{
-    # bug id 20010306.008
+    {
+        $_ = 'var="foo"';
+        /(\")/;
+        ok $1 && /$1/, "Capture a quote";
+    }
 
-    $a = "a\x{1234}";
-    # The original bug report had 'no utf8' here but that was irrelevant.
-    $a =~ m/\w/; # used to core dump
+    {
+        local $Message =  "Call code from qr //";
+        $a = qr/(?{++$b})/;
+        $b = 7;
+        ok /$a$a/ && $b eq '9';
+
+        $c="$a";
+        ok /$a$a/ && $b eq '11';
+
+        undef $@;
+        eval {/$c/};
+        ok $@ && $@ =~ /not allowed at runtime/;
+
+        use re "eval";
+        /$a$c$a/;
+        iseq $b, '14';
+
+        our $lex_a = 43;
+        our $lex_b = 17;
+        our $lex_c = 27;
+        my $lex_res = ($lex_b =~ qr/$lex_b(?{ $lex_c = $lex_a++ })/);
+
+        iseq $lex_res, 1;
+        iseq $lex_a, 44;
+        iseq $lex_c, 43;
+
+        no re "eval";
+        undef $@;
+        my $match = eval { /$a$c$a/ };
+        ok $@ && $@ =~ /Eval-group not allowed/ && !$match;
+        iseq $b, '14';
+     
+        $lex_a = 2;
+        $lex_a = 43;
+        $lex_b = 17;
+        $lex_c = 27;
+        $lex_res = ($lex_b =~ qr/17(?{ $lex_c = $lex_a++ })/);
+
+        iseq $lex_res, 1;
+        iseq $lex_a, 44;
+        iseq $lex_c, 43;
 
-    print "ok 581\n";
-}
+    }
 
-{
-    $test = 582;
 
-    # bugid 20010410.006
-    for my $rx (
-		'/(.*?)\{(.*?)\}/csg',
-		'/(.*?)\{(.*?)\}/cg',
-		'/(.*?)\{(.*?)\}/sg',
-		'/(.*?)\{(.*?)\}/g',
-		'/(.+?)\{(.+?)\}/csg',
-	       )
     {
-	my($input, $i);
+        no warnings 'closure';
+        local $Message = '(?{ $var } refers to package vars';
+        package aa;
+        our $c = 2;
+        $::c = 3;
+        '' =~ /(?{ $c = 4 })/;
+        main::iseq $c, 4;
+        main::iseq $::c, 3;
+    }
 
-	$i = 0;
-	$input = "a{b}c{d}";
-        eval <<EOT;
-	while (eval \$input =~ $rx) {
-	    print "# \\\$1 = '\$1' \\\$2 = '\$2'\n";
-	    ++\$i;
-	}
-EOT
-	print "not " unless $i == 2;
-	print "ok " . $test++ . "\n";
+
+    {
+        must_die 'q(a:[b]:) =~ /[x[:foo:]]/',
+                 'POSIX class \[:[^:]+:\] unknown in regex',
+                 'POSIX class [: :] must have valid name';
+
+        for my $d (qw [= .]) {
+            must_die "/[[${d}foo${d}]]/",
+                     "\QPOSIX syntax [$d $d] is reserved for future extensions",
+                     "POSIX syntax [[$d $d]] is an error";
+        }
     }
-}
 
-{
-    # from Robin Houston
 
-    my $x = "\x{10FFFD}";
-    $x =~ s/(.)/$1/g;
-    print "not " unless ord($x) == 0x10FFFD && length($x) == 1;
-    print "ok 587\n";
-}
+    {
+        # test if failure of patterns returns empty list
+        local $Message = "Failed pattern returns empty list";
+        $_ = 'aaa';
+        @_ = /bbb/;
+        iseq "@_", "";
+
+        @_ = /bbb/g;
+        iseq "@_", "";
 
-{
-    my $x = "\x7f";
+        @_ = /(bbb)/;
+        iseq "@_", "";
 
-    print "not " if     $x =~ /[\x80-\xff]/;
-    print "ok 588\n";
+        @_ = /(bbb)/g;
+        iseq "@_", "";
+    }
 
-    print "not " if     $x =~ /[\x80-\x{100}]/;
-    print "ok 589\n";
+    
+    {
+        local $Message = '@- and @+ tests';
+
+        /a(?=.$)/;
+        iseq $#+, 0;
+        iseq $#-, 0;
+        iseq $+ [0], 2;
+        iseq $- [0], 1;
+        ok !defined $+ [1] && !defined $- [1] &&
+           !defined $+ [2] && !defined $- [2];
+
+        /a(a)(a)/;
+        iseq $#+, 2;
+        iseq $#-, 2;
+        iseq $+ [0], 3;
+        iseq $- [0], 0;
+        iseq $+ [1], 2;
+        iseq $- [1], 1;
+        iseq $+ [2], 3;
+        iseq $- [2], 2;
+        ok !defined $+ [3] && !defined $- [3] &&
+           !defined $+ [4] && !defined $- [4];
+
+
+        /.(a)(b)?(a)/;
+        iseq $#+, 3;
+        iseq $#-, 3;
+        iseq $+ [1], 2;
+        iseq $- [1], 1;
+        iseq $+ [3], 3;
+        iseq $- [3], 2;
+        ok !defined $+ [2] && !defined $- [2] &&
+           !defined $+ [4] && !defined $- [4];
+
+
+        /.(a)/;
+        iseq $#+, 1;
+        iseq $#-, 1;
+        iseq $+ [0], 2;
+        iseq $- [0], 0;
+        iseq $+ [1], 2;
+        iseq $- [1], 1;
+        ok !defined $+ [2] && !defined $- [2] &&
+           !defined $+ [3] && !defined $- [3];
+
+        /.(a)(ba*)?/;
+        iseq $#+, 2;
+        iseq $#-, 1;
+    }
 
-    print "not " if     $x =~ /[\x{100}]/;
-    print "ok 590\n";
 
-    print "not " if     $x =~ /\p{InLatin1Supplement}/;
-    print "ok 591\n";
+    {
+        local $DiePattern = '^Modification of a read-only value attempted';
+        local $Message    = 'Elements of @- and @+ are read-only';
+        must_die '$+[0] = 13';
+        must_die '$-[0] = 13';
+        must_die '@+ = (7, 6, 5)';
+        must_die '@- = qw (foo bar)';
+    }
 
-    print "not " unless $x =~ /\P{InLatin1Supplement}/;
-    print "ok 592\n";
 
-    print "not " if     $x =~ /\p{InLatinExtendedA}/;
-    print "ok 593\n";
+    {
+        local $Message = '\G testing';
+        $_ = 'aaa';
+        pos = 1;
+        my @a = /\Ga/g;
+        iseq "@a", "a a";
+
+        my $str = 'abcde';
+        pos $str = 2;
+        ok $str !~ /^\G/;
+        ok $str !~ /^.\G/;
+        ok $str =~ /^..\G/;
+        ok $str !~ /^...\G/;
+        ok $str =~ /\G../ && $& eq 'cd';
+
+        local $TODO = $running_as_thread;
+        ok $str =~ /.\G./ && $& eq 'bc';
+    }
 
-    print "not " unless $x =~ /\P{InLatinExtendedA}/;
-    print "ok 594\n";
-}
 
-{
-    my $x = "\x80";
+    {
+        local $Message = 'pos inside (?{ })';
+        my $str = 'abcde';
+        our ($foo, $bar);
+        ok $str =~ /b(?{$foo = $_; $bar = pos})c/;
+        iseq $foo, $str;
+        iseq $bar, 2;
+        ok !defined pos ($str);
+
+        undef $foo;
+        undef $bar;
+        pos $str = undef;
+        ok $str =~ /b(?{$foo = $_; $bar = pos})c/g;
+        iseq $foo, $str;
+        iseq $bar, 2;
+        iseq pos ($str), 3;
+
+        $_ = $str;
+        undef $foo;
+        undef $bar;
+        ok /b(?{$foo = $_; $bar = pos})c/;
+        iseq $foo, $str;
+        iseq $bar, 2;
+
+        undef $foo;
+        undef $bar;
+        ok /b(?{$foo = $_; $bar = pos})c/g;
+        iseq $foo, $str;
+        iseq $bar, 2;
+        iseq pos, 3;
+
+        undef $foo;
+        undef $bar;
+        pos = undef;
+        1 while /b(?{$foo = $_; $bar = pos})c/g;
+        iseq $foo, $str;
+        iseq $bar, 2;
+        ok !defined pos;
+
+        undef $foo;
+        undef $bar;
+        $_ = 'abcde|abcde';
+        ok s/b(?{$foo = $_; $bar = pos})c/x/g;
+        iseq $foo, 'abcde|abcde';
+        iseq $bar, 8;
+        iseq $_, 'axde|axde';
+
+        # List context:
+        $_ = 'abcde|abcde';
+        our @res;
+        () = /([ace]).(?{push @res, $1,$2})([ce])(?{push @res, $1,$2})/g;
+        @res = map {defined $_ ? "'$_'" : 'undef'} @res;
+        iseq "@res", "'a' undef 'a' 'c' 'e' undef 'a' undef 'a' 'c'";
+
+        @res = ();
+        () = /([ace]).(?{push @res, $`,$&,$'})([ce])(?{push @res, $`,$&,$'})/g;
+        @res = map {defined $_ ? "'$_'" : 'undef'} @res;
+        iseq "@res", "'' 'ab' 'cde|abcde' " .
+                     "'' 'abc' 'de|abcde' " .
+                     "'abcd' 'e|' 'abcde' " .
+                     "'abcde|' 'ab' 'cde' " .
+                     "'abcde|' 'abc' 'de'" ;
+    }
 
-    print "not " unless $x =~ /[\x80-\xff]/;
-    print "ok 595\n";
 
-    print "not " unless $x =~ /[\x80-\x{100}]/;
-    print "ok 596\n";
+    {
+        local $Message = '\G anchor checks';
+        my $foo = 'aabbccddeeffgg';
+        pos ($foo) = 1;
+        {
+            local $TODO = $running_as_thread;
+            no warnings 'uninitialized';
+            ok $foo =~ /.\G(..)/g;
+            iseq $1, 'ab';
+
+            pos ($foo) += 1;
+            ok $foo =~ /.\G(..)/g;
+            iseq $1, 'cc';
+
+            pos ($foo) += 1;
+            ok $foo =~ /.\G(..)/g;
+            iseq $1, 'de';
+
+            ok $foo =~ /\Gef/g;
+        }
+
+        undef pos $foo;
+        ok $foo =~ /\G(..)/g;
+        iseq $1, 'aa';
+
+        ok $foo =~ /\G(..)/g;
+        iseq $1, 'bb';
+
+        pos ($foo) = 5;
+        ok $foo =~ /\G(..)/g;
+        iseq $1, 'cd';
+    }
 
-    print "not " if     $x =~ /[\x{100}]/;
-    print "ok 597\n";
 
-    print "not " unless $x =~ /\p{InLatin1Supplement}/;
-    print "ok 598\n";
+    {
+        $_ = '123x123';
+        my @res = /(\d*|x)/g;
+        local $" = '|';
+        iseq "@res", "123||x|123|", "0 match in alternation";
+    }
 
-    print "not " if    $x =~ /\P{InLatin1Supplement}/;
-    print "ok 599\n";
 
-    print "not " if     $x =~ /\p{InLatinExtendedA}/;
-    print "ok 600\n";
+    {
+        local $Message = "Match against temporaries (created via pp_helem())" .
+                         " is safe";
+        ok {foo => "bar\n" . $^X} -> {foo} =~ /^(.*)\n/g;
+        iseq $1, "bar";
+    }
 
-    print "not " unless $x =~ /\P{InLatinExtendedA}/;
-    print "ok 601\n";
-}
 
-{
-    my $x = "\xff";
+    {
+        local $Message = 'package $i inside (?{ }), ' .
+                         'saved substrings and changing $_';
+        our @a = qw [foo bar];
+        our @b = ();
+        s/(\w)(?{push @b, $1})/,$1,/g for @a;
+        iseq "@b", "f o o b a r";
+        iseq "@a", ",f,,o,,o, ,b,,a,,r,";
+
+        local $Message = 'lexical $i inside (?{ }), ' .
+                         'saved substrings and changing $_';
+        no warnings 'closure';
+        my @c = qw [foo bar];
+        my @d = ();
+        s/(\w)(?{push @d, $1})/,$1,/g for @c;
+        iseq "@d", "f o o b a r";
+        iseq "@c", ",f,,o,,o, ,b,,a,,r,";
+    }
 
-    print "not " unless $x =~ /[\x80-\xff]/;
-    print "ok 602\n";
 
-    print "not " unless $x =~ /[\x80-\x{100}]/;
-    print "ok 603\n";
+    {
+        local $Message = 'Brackets';
+        our $brackets;
+        $brackets = qr {
+            {  (?> [^{}]+ | (??{ $brackets }) )* }
+        }x;
+
+        ok "{{}" =~ $brackets;
+        iseq $&, "{}";
+        ok "something { long { and } hairy" =~ $brackets;
+        iseq $&, "{ and }";
+        ok "something { long { and } hairy" =~ m/((??{ $brackets }))/;
+        iseq $&, "{ and }";
+    }
 
-    print "not " if     $x =~ /[\x{100}]/;
-    print "ok 604\n";
 
-    # the next two tests must be ignored on EBCDIC
-    print "not " unless $x =~ /\p{InLatin1Supplement}/ or ord("A") == 193;
-    print "ok 605\n";
+    {
+        $_ = "a-a\nxbb";
+        pos = 1;
+        nok m/^-.*bb/mg, '$_ = "a-a\nxbb"; m/^-.*bb/mg';
+    }
 
-    print "not " if     $x =~ /\P{InLatin1Supplement}/ and ord("A") != 193;
-    print "ok 606\n";
 
-    print "not " if     $x =~ /\p{InLatinExtendedA}/;
-    print "ok 607\n";
+    {
+        local $Message = '\G anchor checks';
+        my $text = "aaXbXcc";
+        pos ($text) = 0;
+        ok $text !~ /\GXb*X/g;
+    }
 
-    print "not " unless $x =~ /\P{InLatinExtendedA}/;
-    print "ok 608\n";
-}
 
-{
-    my $x = "\x{100}";
+    {
+        $_ = "xA\n" x 500;
+        nok /^\s*A/m, '$_ = "xA\n" x 500; /^\s*A/m"';
 
-    print "not " if     $x =~ /[\x80-\xff]/;
-    print "ok 609\n";
+        my $text = "abc dbf";
+        my @res = ($text =~ /.*?(b).*?\b/g);
+        iseq "@res", "b b", '\b is not special';
+    }
 
-    print "not " unless $x =~ /[\x80-\x{100}]/;
-    print "ok 610\n";
 
-    print "not " unless $x =~ /[\x{100}]/;
-    print "ok 611\n";
+    {
+        local $Message = '\S, [\S], \s, [\s]';
+        my @a = map chr, 0 .. 255;
+        my @b = grep /\S/, @a;
+        my @c = grep /[^\s]/, @a;
+        iseq "@b", "@c";
+
+        @b = grep /\S/, @a;
+        @c = grep /[\S]/, @a;
+        iseq "@b", "@c";
+
+        @b = grep /\s/, @a;
+        @c = grep /[^\S]/, @a;
+        iseq "@b", "@c";
+
+        @b = grep /\s/, @a;
+        @c = grep /[\s]/, @a;
+        iseq "@b", "@c";
+    }
+    {
+        local $Message = '\D, [\D], \d, [\d]';
+        my @a = map chr, 0 .. 255;
+        my @b = grep /\D/, @a;
+        my @c = grep /[^\d]/, @a;
+        iseq "@b", "@c";
+
+        @b = grep /\D/, @a;
+        @c = grep /[\D]/, @a;
+        iseq "@b", "@c";
+
+        @b = grep /\d/, @a;
+        @c = grep /[^\D]/, @a;
+        iseq "@b", "@c";
+
+        @b = grep /\d/, @a;
+        @c = grep /[\d]/, @a;
+        iseq "@b", "@c";
+    }
+    {
+        local $Message = '\W, [\W], \w, [\w]';
+        my @a = map chr, 0 .. 255;
+        my @b = grep /\W/, @a;
+        my @c = grep /[^\w]/, @a;
+        iseq "@b", "@c";
+
+        @b = grep /\W/, @a;
+        @c = grep /[\W]/, @a;
+        iseq "@b", "@c";
+
+        @b = grep /\w/, @a;
+        @c = grep /[^\W]/, @a;
+        iseq "@b", "@c";
+
+        @b = grep /\w/, @a;
+        @c = grep /[\w]/, @a;
+        iseq "@b", "@c";
+    }
 
-    print "not " if     $x =~ /\p{InLatin1Supplement}/;
-    print "ok 612\n";
 
-    print "not " unless $x =~ /\P{InLatin1Supplement}/;
-    print "ok 613\n";
+    {
+        # see if backtracking optimization works correctly
+        local $Message = 'Backtrack optimization';
+        ok "\n\n" =~ /\n   $ \n/x;
+        ok "\n\n" =~ /\n*  $ \n/x;
+        ok "\n\n" =~ /\n+  $ \n/x;
+        ok "\n\n" =~ /\n?  $ \n/x;
+        ok "\n\n" =~ /\n*? $ \n/x;
+        ok "\n\n" =~ /\n+? $ \n/x;
+        ok "\n\n" =~ /\n?? $ \n/x;
+        ok "\n\n" !~ /\n*+ $ \n/x;
+        ok "\n\n" !~ /\n++ $ \n/x;
+        ok "\n\n" =~ /\n?+ $ \n/x;
+    }
 
-    print "not " unless $x =~ /\p{InLatinExtendedA}/;
-    print "ok 614\n";
 
-    print "not " if     $x =~ /\P{InLatinExtendedA}/;
-    print "ok 615\n";
-}
+    {
+        package S;
+        use overload '""' => sub {'Object S'};
+        sub new {bless []}
+     
+        local $Message  = "Ref stringification";
+      ::ok do { \my $v} =~ /^SCALAR/,   "Scalar ref stringification";
+      ::ok do {\\my $v} =~ /^REF/,      "Ref ref stringification";
+      ::ok []           =~ /^ARRAY/,    "Array ref stringification";
+      ::ok {}           =~ /^HASH/,     "Hash ref stringification";
+      ::ok 'S' -> new   =~ /^Object S/, "Object stringification";
+    }
 
-{
-    # from japhy
-    my $w;
-    use warnings;    
-    local $SIG{__WARN__} = sub { $w .= shift };
-
-    $w = "";
-    eval 'qr/(?c)/';
-    print "not " if $w !~ /^Useless \(\?c\)/;
-    print "ok 616\n";
-
-    $w = "";
-    eval 'qr/(?-c)/';
-    print "not " if $w !~ /^Useless \(\?-c\)/;
-    print "ok 617\n";
-
-    $w = "";
-    eval 'qr/(?g)/';
-    print "not " if $w !~ /^Useless \(\?g\)/;
-    print "ok 618\n";
-
-    $w = "";
-    eval 'qr/(?-g)/';
-    print "not " if $w !~ /^Useless \(\?-g\)/;
-    print "ok 619\n";
-
-    $w = "";
-    eval 'qr/(?o)/';
-    print "not " if $w !~ /^Useless \(\?o\)/;
-    print "ok 620\n";
-
-    $w = "";
-    eval 'qr/(?-o)/';
-    print "not " if $w !~ /^Useless \(\?-o\)/;
-    print "ok 621\n";
-
-    # now test multi-error regexes
-
-    $w = "";
-    eval 'qr/(?g-o)/';
-    print "not " if $w !~ /^Useless \(\?g\).*\nUseless \(\?-o\)/;
-    print "ok 622\n";
-
-    $w = "";
-    eval 'qr/(?g-c)/';
-    print "not " if $w !~ /^Useless \(\?g\).*\nUseless \(\?-c\)/;
-    print "ok 623\n";
-
-    $w = "";
-    eval 'qr/(?o-cg)/';  # (?c) means (?g) error won't be thrown
-    print "not " if $w !~ /^Useless \(\?o\).*\nUseless \(\?-c\)/;
-    print "ok 624\n";
-
-    $w = "";
-    eval 'qr/(?ogc)/';
-    print "not " if $w !~ /^Useless \(\?o\).*\nUseless \(\?g\).*\nUseless \(\?c\)/;
-    print "ok 625\n";
-}
 
-# More Unicode "class" tests
+    {
+        local $Message = "Test result of match used as match";
+        ok 'a1b' =~ ('xyz' =~ /y/);
+        iseq $`, 'a';
+        ok 'a1b' =~ ('xyz' =~ /t/);
+        iseq $`, 'a';
+    }
 
-{
-    use charnames ':full';
 
-    print "not " unless "\N{LATIN CAPITAL LETTER A}" =~ /\p{InBasicLatin}/;
-    print "ok 626\n";
+    {
+        local $Message = '"1" is not \s';
+        may_not_warn sub {ok ("1\n" x 102) !~ /^\s*\n/m};
+    }
 
-    print "not " unless "\N{LATIN CAPITAL LETTER A WITH GRAVE}" =~ /\p{InLatin1Supplement}/;
-    print "ok 627\n";
 
-    print "not " unless "\N{LATIN CAPITAL LETTER A WITH MACRON}" =~ /\p{InLatinExtendedA}/;
-    print "ok 628\n";
+    {
+        local $Message = '\s, [[:space:]] and [[:blank:]]';
+        my %space = (spc   => " ",
+                     tab   => "\t",
+                     cr    => "\r",
+                     lf    => "\n",
+                     ff    => "\f",
+        # There's no \v but the vertical tabulator seems miraculously
+        # be 11 both in ASCII and EBCDIC.
+                     vt    => chr(11),
+                     false => "space");
+
+        my @space0 = sort grep {$space {$_} =~ /\s/         } keys %space;
+        my @space1 = sort grep {$space {$_} =~ /[[:space:]]/} keys %space;
+        my @space2 = sort grep {$space {$_} =~ /[[:blank:]]/} keys %space;
+
+        iseq "@space0", "cr ff lf spc tab";
+        iseq "@space1", "cr ff lf spc tab vt";
+        iseq "@space2", "spc tab";
+    }
 
-    print "not " unless "\N{LATIN SMALL LETTER B WITH STROKE}" =~ /\p{InLatinExtendedB}/;
-    print "ok 629\n";
 
-    print "not " unless "\N{KATAKANA LETTER SMALL A}" =~ /\p{InKatakana}/;
-    print "ok 630\n";
-}
+    {
+        local $BugId = '20000731.001';
+        ok "A \x{263a} B z C" =~ /A . B (??{ "z" }) C/,
+           "Match UTF-8 char in presense of (??{ })";
+    }
 
-$_ = "foo";
-
-eval <<"EOT"; die if $@;
-  /f
-   o\r
-   o
-   \$
-  /x && print "ok 631\n";
-EOT
-
-eval <<"EOT"; die if $@;
-  /f
-   o
-   o
-   \$\r
-  /x && print "ok 632\n";
-EOT
-
-#test /o feature
-sub test_o { $_[0] =~/$_[1]/o; return $1}
-if(test_o('abc','(.)..') eq 'a') {
-    print "ok 633\n";
-} else {
-    print "not ok 633\n";
-}
-if(test_o('abc','..(.)') eq 'a') {
-    print "ok 634\n";
-} else {
-    print "not ok 634\n";
-}
 
-# 635..639: ID 20010619.003 (only the space character is
-# supposed to be [:print:], not the whole isprint()).
-
-print "not " if "\n"     =~ /[[:print:]]/;
-print "ok 635\n";
-
-print "not " if "\t"     =~ /[[:print:]]/;
-print "ok 636\n";
-
-# Amazingly vertical tabulator is the same in ASCII and EBCDIC.
-print "not " if "\014"  =~ /[[:print:]]/;
-print "ok 637\n";
-
-print "not " if "\r"    =~ /[[:print:]]/;
-print "ok 638\n";
-
-print "not " unless " " =~ /[[:print:]]/;
-print "ok 639\n";
-
-##
-## Test basic $^N usage outside of a regex
-##
-$x = "abcdef";
-$T="ok 640\n";if ($x =~ /cde/ and not defined $^N)         {print $T} else {print "not $T"};
-$T="ok 641\n";if ($x =~ /(cde)/          and $^N eq "cde") {print $T} else {print "not $T"};
-$T="ok 642\n";if ($x =~ /(c)(d)(e)/      and $^N eq   "e") {print $T} else {print "not $T"};
-$T="ok 643\n";if ($x =~ /(c(d)e)/        and $^N eq "cde") {print $T} else {print "not $T"};
-$T="ok 644\n";if ($x =~ /(foo)|(c(d)e)/  and $^N eq "cde") {print $T} else {print "not $T"};
-$T="ok 645\n";if ($x =~ /(c(d)e)|(foo)/  and $^N eq "cde") {print $T} else {print "not $T"};
-$T="ok 646\n";if ($x =~ /(c(d)e)|(abc)/  and $^N eq "abc") {print $T} else {print "not $T"};
-$T="ok 647\n";if ($x =~ /(c(d)e)|(abc)x/ and $^N eq "cde") {print $T} else {print "not $T"};
-$T="ok 648\n";if ($x =~ /(c(d)e)(abc)?/  and $^N eq "cde") {print $T} else {print "not $T"};
-$T="ok 649\n";if ($x =~ /(?:c(d)e)/      and $^N eq  "d" ) {print $T} else {print "not $T"};
-$T="ok 650\n";if ($x =~ /(?:c(d)e)(?:f)/ and $^N eq  "d" ) {print $T} else {print "not $T"};
-$T="ok 651\n";if ($x =~ /(?:([abc])|([def]))*/ and $^N eq  "f" ){print $T} else {print "not $T"};
-$T="ok 652\n";if ($x =~ /(?:([ace])|([bdf]))*/ and $^N eq  "f" ){print $T} else {print "not $T"};
-$T="ok 653\n";if ($x =~ /(([ace])|([bd]))*/    and $^N eq  "e" ){print $T} else {print "not $T"};
-{
- $T="ok 654\n";if($x =~ /(([ace])|([bdf]))*/   and $^N eq  "f" ){print $T} else {print "not $T"};
-}
-## test to see if $^N is automatically localized -- it should now
-## have the value set in test 653
-$T="ok 655\n";if ($^N eq  "e" ){print $T} else {print "not $T"};
-
-##
-## Now test inside (?{...})
-##
-$T="ok 656\n";if ($x =~ /a([abc])(?{$y=$^N})c/      and $y eq "b" ){print $T} else {print "not $T"};
-$T="ok 657\n";if ($x =~ /a([abc]+)(?{$y=$^N})d/     and $y eq "bc"){print $T} else {print "not $T"};
-$T="ok 658\n";if ($x =~ /a([abcdefg]+)(?{$y=$^N})d/ and $y eq "bc"){print $T} else {print "not $T"};
-$T="ok 659\n";if ($x =~ /(a([abcdefg]+)(?{$y=$^N})d)(?{$z=$^N})e/ and $y eq "bc" and $z eq "abcd")
-              {print $T} else {print "not $T"};
-$T="ok 660\n";if ($x =~ /(a([abcdefg]+)(?{$y=$^N})de)(?{$z=$^N})/ and $y eq "bc" and $z eq "abcde")
-              {print $T} else {print "not $T"};
-
-# Test the Unicode script classes
-
-print "not " unless chr(0x100) =~ /\p{IsLatin}/; # outside Latin-1
-print "ok 661\n";
-
-print "not " unless chr(0x212b) =~ /\p{IsLatin}/; # Angstrom sign, very outside
-print "ok 662\n";
-
-print "not " unless chr(0x5d0) =~ /\p{IsHebrew}/; # inside InHebrew
-print "ok 663\n";
-
-print "not " unless chr(0xfb4f) =~ /\p{IsHebrew}/; # outside InHebrew
-print "ok 664\n";
-
-# # singleton (not in a range, this test must be ignored on EBCDIC)
-# print "not " unless chr(0xb5) =~ /\p{IsGreek}/ or ord("A") == 193;
-# print "ok 665\n";
-print "ok 665 # 0xb5 moved from Greek to Common with Unicode 4.0.1\n";
-
-print "not " unless chr(0x37a) =~ /\p{IsGreek}/; # singleton
-print "ok 666\n";
-
-print "not " unless chr(0x386) =~ /\p{IsGreek}/; # singleton
-print "ok 667\n";
-
-print "not " unless chr(0x387) =~ /\P{IsGreek}/; # not there
-print "ok 668\n";
-
-print "not " unless chr(0x388) =~ /\p{IsGreek}/; # range
-print "ok 669\n";
-
-print "not " unless chr(0x38a) =~ /\p{IsGreek}/; # range
-print "ok 670\n";
-
-print "not " unless chr(0x38b) =~ /\P{IsGreek}/; # not there
-print "ok 671\n";
-
-print "not " unless chr(0x38c) =~ /\p{IsGreek}/; # singleton
-print "ok 672\n";
-
-if (ord("A") == 65) {
-##
-## Test [:cntrl:]...
-##
-## Should probably put in tests for all the POSIX stuff, but not sure how to
-## guarantee a specific locale......
-##
-    $AllBytes = join('', map { chr($_) } 0..255);
-    ($x = $AllBytes) =~ s/[[:cntrl:]]//g;
-    if ($x ne join('', map { chr($_) } 0x20..0x7E, 0x80..0xFF)) {
-	print "not ";
-    }
-    print "ok 673\n";
-
-    ($x = $AllBytes) =~ s/[^[:cntrl:]]//g;
-    if ($x ne join('', map { chr($_) } 0..0x1F, 0x7F)) { print "not " }
-    print "ok 674\n";
-} else {
-    print "ok $_ # Skip: EBCDIC\n" for 673..674;
-}
+    {
+        local $BugId = '20001021.005';
+        no warnings 'uninitialized';
+        ok undef =~ /^([^\/]*)(.*)$/, "Used to cause a SEGV";
+    }
 
-# With /s modifier UTF8 chars were interpreted as bytes
-{
-    my $a = "Hello \x{263A} World";
-    
-    my @a = ($a =~ /./gs);
-    
-    print "not " unless $#a == 12;
-    print "ok 675\n";
-}
 
-@a = ("foo\nbar" =~ /./g);
-print "ok 676\n" if @a == 6 && "@a" eq "f o o b a r";
+  SKIP:
+    {
+        local $Message = '\C matches octet';
+        $_ = "a\x{100}b";
+        ok /(.)(\C)(\C)(.)/ or skip q [\C doesn't match], 4;
+        iseq $1, "a";
+        if ($IS_ASCII) {     # ASCII (or equivalent), should be UTF-8
+            iseq $2, "\xC4";
+            iseq $3, "\x80";
+        }
+        elsif ($IS_EBCDIC) { # EBCDIC (or equivalent), should be UTF-EBCDIC
+            iseq $2, "\x8C";
+            iseq $3, "\x41";
+        }
+        else {
+            SKIP: {
+                ok 0, "Unexpected platform", "ord ('A') = $ordA";
+                skip "Unexpected platform";
+            }
+        }
+        iseq $4, "b";
+    }
 
-@a = ("foo\nbar" =~ /./gs);
-print "ok 677\n" if @a == 7 && "@a" eq "f o o \n b a r";
 
-@a = ("foo\nbar" =~ /\C/g);
-print "ok 678\n" if @a == 7 && "@a" eq "f o o \n b a r";
+  SKIP:
+    {
+        local $Message = '\C matches octet';
+        $_ = "\x{100}";
+        ok /(\C)/g or skip q [\C doesn't match], 2;
+        if ($IS_ASCII) {
+            iseq $1, "\xC4";
+        }
+        elsif ($IS_EBCDIC) {
+            iseq $1, "\x8C";
+        }
+        else {
+            ok 0, "Unexpected platform", "ord ('A') = $ordA";
+        }
+        ok /(\C)/g or skip q [\C doesn't match];
+        if ($IS_ASCII) {
+            iseq $1, "\x80";
+        }
+        elsif ($IS_EBCDIC) {
+            iseq $1, "\x41";
+        }
+        else {
+            ok 0, "Unexpected platform", "ord ('A') = $ordA";
+        }
+    }
 
-@a = ("foo\nbar" =~ /\C/gs);
-print "ok 679\n" if @a == 7 && "@a" eq "f o o \n b a r";
 
-@a = ("foo\n\x{100}bar" =~ /./g);
-print "ok 680\n" if @a == 7 && "@a" eq "f o o \x{100} b a r";
+    {
+        # Japhy -- added 03/03/2001
+        () = (my $str = "abc") =~ /(...)/;
+        $str = "def";
+        iseq $1, "abc", 'Changing subject does not modify $1';
+    }
 
-@a = ("foo\n\x{100}bar" =~ /./gs);
-print "ok 681\n" if @a == 8 && "@a" eq "f o o \n \x{100} b a r";
 
-($a, $b) = map { chr } ord('A') == 65 ? (0xc4, 0x80) : (0x8c, 0x41);
+  SKIP:
+    {
+        # The trick is that in EBCDIC the explicit numeric range should
+        # match (as also in non-EBCDIC) but the explicit alphabetic range
+        # should not match.
+        ok "\x8e" =~ /[\x89-\x91]/, '"\x8e" =~ /[\x89-\x91]/';
+        ok "\xce" =~ /[\xc9-\xd1]/, '"\xce" =~ /[\xc9-\xd1]/';
+
+        skip "Not an EBCDIC platform", 2 unless ord ('i') == 0x89 &&
+                                                ord ('J') == 0xd1;
+
+        # In most places these tests would succeed since \x8e does not
+        # in most character sets match 'i' or 'j' nor would \xce match
+        # 'I' or 'J', but strictly speaking these tests are here for
+        # the good of EBCDIC, so let's test these only there.
+        nok "\x8e" !~ /[i-j]/, '"\x8e" !~ /[i-j]/';
+        nok "\xce" !~ /[I-J]/, '"\xce" !~ /[I-J]/';
+    }
 
-@a = ("foo\n\x{100}bar" =~ /\C/g);
-print "ok 682\n" if @a == 9 && "@a" eq "f o o \n $a $b b a r";
 
-@a = ("foo\n\x{100}bar" =~ /\C/gs);
-print "ok 683\n" if @a == 9 && "@a" eq "f o o \n $a $b b a r";
+    {
+        ok "\x{ab}"   =~ /\x{ab}/,   '"\x{ab}"   =~ /\x{ab}/  ';
+        ok "\x{abcd}" =~ /\x{abcd}/, '"\x{abcd}" =~ /\x{abcd}/';
+    }
 
-{
-    # [ID 20010814.004] pos() doesn't work when using =~m// in list context
-    $_ = "ababacadaea";
-    $a = join ":", /b./gc;
-    $b = join ":", /a./gc;
-    $c = pos;
-    print "$a $b $c" eq 'ba:ba ad:ae 10' ? "ok 684\n" : "not ok 684\t# $a $b $c\n";
-}
 
-{
-    # [ID 20010407.006] matching utf8 return values from functions does not work
+    {
+        local $Message = 'bug id 20001008.001';
+
+        my @x = ("stra\337e 138", "stra\337e 138");
+        for (@x) {
+            ok s/(\d+)\s*([\w\-]+)/$1 . uc $2/e;
+            ok my ($latin) = /^(.+)(?:\s+\d)/;
+            iseq $latin, "stra\337e";
+	    ok $latin =~ s/stra\337e/straße/;
+            #
+            # Previous code follows, but outcommented - there were no tests.
+            #
+            # $latin =~ s/stra\337e/straße/; # \303\237 after the 2nd a
+            # use utf8; # needed for the raw UTF-8
+            # $latin =~ s!(s)tr(?:aß|s+e)!$1tr.!; # \303\237 after the a
+        }
+    }
 
-    package ID_20010407_006;
 
-    sub x {
-	"a\x{1234}";
+    {
+        local $Message = 'Test \x escapes';
+        ok "ba\xd4c" =~ /([a\xd4]+)/ && $1 eq "a\xd4";
+        ok "ba\xd4c" =~ /([a\xd4]+)/ && $1 eq "a\x{d4}";
+        ok "ba\x{d4}c" =~ /([a\xd4]+)/ && $1 eq "a\x{d4}";
+        ok "ba\x{d4}c" =~ /([a\xd4]+)/ && $1 eq "a\xd4";
+        ok "ba\xd4c" =~ /([a\x{d4}]+)/ && $1 eq "a\xd4";
+        ok "ba\xd4c" =~ /([a\x{d4}]+)/ && $1 eq "a\x{d4}";
+        ok "ba\x{d4}c" =~ /([a\x{d4}]+)/ && $1 eq "a\x{d4}";
+        ok "ba\x{d4}c" =~ /([a\x{d4}]+)/ && $1 eq "a\xd4";
     }
 
-    my $x = x;
-    my $y;
 
-    $x =~ /(..)/; $y = $1;
-    print "not " unless length($y) == 2 && $y eq $x;
-    print "ok 685\n";
+    {
+        local $BugId   = '20001028.003';
+
+        # Fist half of the bug.
+        local $Message = 'HEBREW ACCENT QADMA matched by .*';
+        my $X = chr (1448);
+        ok my ($Y) = $X =~ /(.*)/;
+        iseq $Y, v1448;
+        iseq length ($Y), 1;
+
+        # Second half of the bug.
+        $Message = 'HEBREW ACCENT QADMA in replacement';
+        $X = '';
+        $X =~ s/^/chr(1488)/e;
+        iseq length $X, 1;
+        iseq ord ($X), 1488;
+    }
 
-    x  =~ /(..)/; $y = $1;
-    print "not " unless length($y) == 2 && $y eq $x;
-    print "ok 686\n";
-}
 
+    {   
+        local $BugId   = '20001108.001';
+        local $Message = 'Repeated s///';
+        my $X = "Szab\x{f3},Bal\x{e1}zs";
+        my $Y = $X;
+        $Y =~ s/(B)/$1/ for 0 .. 3;
+        iseq $Y, $X;
+        iseq $X, "Szab\x{f3},Bal\x{e1}zs";
+    }
 
-my $test = 687;
 
-# Force scalar context on the patern match
-sub ok ($$) {
-    my($ok, $name) = @_;
+    {
+        local $BugId   = '20000517.001';
+        local $Message = 's/// on UTF-8 string';
+        my $x = "\x{100}A";
+        $x =~ s/A/B/;
+        iseq $x, "\x{100}B";
+        iseq length $x, 2;
+    }
 
-    printf "%sok %d - %s\n", ($ok ? "" : "not "), $test, $name;
 
-    printf "# Failed test at line %d\n", (caller)[2] unless $ok;
+    {
+        local $BugId   = '20001230.002';
+        local $Message = '\C and É';
+        ok "École" =~ /^\C\C(.)/ && $1 eq 'c';
+        ok "École" =~ /^\C\C(c)/;
+    }
 
-    $test++;
-    return $ok;
-}
 
-{
-    # Check that \x## works. 5.6.1 and 5.005_03 fail some of these.
-    $x = "\x4e" . "E";
-    ok ($x =~ /^\x4EE$/, "Check only 2 bytes of hex are matched.");
+  SKIP:
+    {
+        local $Message = 'Match code points > 255';
+        $_ = "abc\x{100}\x{200}\x{300}\x{380}\x{400}defg";
+        ok /(.\x{300})./ or skip "No match", 4;
+        ok $` eq "abc\x{100}"            && length ($`) == 4;
+        ok $& eq "\x{200}\x{300}\x{380}" && length ($&) == 3;
+        ok $' eq "\x{400}defg"           && length ($') == 5;
+        ok $1 eq "\x{200}\x{300}"        && length ($1) == 2;
+    }
 
-    $x = "\x4e" . "i";
-    ok ($x =~ /^\x4Ei$/, "Check that invalid hex digit stops it (2)");
 
-    $x = "\x4" . "j";
-    ok ($x =~ /^\x4j$/,  "Check that invalid hex digit stops it (1)");
+    {
+        # The original bug report had 'no utf8' here but that was irrelevant.
+        local $BugId   = '20010306.008';
+        local $Message = "Don't dump core";
+        my $a = "a\x{1234}";
+        ok $a =~ m/\w/;  # used to core dump.
+    }
 
-    $x = "\x0" . "k";
-    ok ($x =~ /^\xk$/,   "Check that invalid hex digit stops it (0)");
 
-    $x = "\x0" . "x";
-    ok ($x =~ /^\xx$/, "\\xx isn't to be treated as \\0");
+    {
+        local $BugId = '20010410.006';
+        local $Message = '/g in scalar context';
+        for my $rx ('/(.*?)\{(.*?)\}/csg',
+		    '/(.*?)\{(.*?)\}/cg',
+		    '/(.*?)\{(.*?)\}/sg',
+		    '/(.*?)\{(.*?)\}/g',
+		    '/(.+?)\{(.+?)\}/csg',) {
+            my $i = 0;
+            my $input = "a{b}c{d}";
+            eval <<"            --";
+                while (eval \$input =~ $rx) {
+                    \$i ++;
+                }
+            --
+            iseq $i, 2;
+        }
+    }
 
-    $x = "\x0" . "xa";
-    ok ($x =~ /^\xxa$/, "\\xxa isn't to be treated as \\xa");
 
-    $x = "\x9" . "_b";
-    ok ($x =~ /^\x9_b$/, "\\x9_b isn't to be treated as \\x9b");
+    {
+        my $x = "\x{10FFFD}";
+        $x =~ s/(.)/$1/g;
+        ok ord($x) == 0x10FFFD && length($x) == 1, "From Robin Houston";
+    }
 
-    print "# and now again in [] ranges\n";
 
-    $x = "\x4e" . "E";
-    ok ($x =~ /^[\x4EE]{2}$/, "Check only 2 bytes of hex are matched.");
+    {
+        my %d = (
+            "7f" => [0, 0, 0],
+            "80" => [1, 1, 0],
+            "ff" => [1, 1, 0],
+           "100" => [0, 1, 1],
+        );
+      SKIP:
+        while (my ($code, $match) = each %d) {
+            local $Message = "Properties of \\x$code";
+            my $char = eval qq ["\\x{$code}"];
+            my $i = 0;
+            ok (($char =~ /[\x80-\xff]/)            xor !$$match [$i ++]);
+            ok (($char =~ /[\x80-\x{100}]/)         xor !$$match [$i ++]);
+            ok (($char =~ /[\x{100}]/)              xor !$$match [$i ++]);
+        }
+    }
 
-    $x = "\x4e" . "i";
-    ok ($x =~ /^[\x4Ei]{2}$/, "Check that invalid hex digit stops it (2)");
 
-    $x = "\x4" . "j";
-    ok ($x =~ /^[\x4j]{2}$/,  "Check that invalid hex digit stops it (1)");
+    {
+        # From Japhy
+        local $Message;
+        must_warn 'qr/(?c)/',    '^Useless \(\?c\)';
+        must_warn 'qr/(?-c)/',   '^Useless \(\?-c\)';
+        must_warn 'qr/(?g)/',    '^Useless \(\?g\)';
+        must_warn 'qr/(?-g)/',   '^Useless \(\?-g\)';
+        must_warn 'qr/(?o)/',    '^Useless \(\?o\)';
+        must_warn 'qr/(?-o)/',   '^Useless \(\?-o\)';
+
+        # Now test multi-error regexes
+        must_warn 'qr/(?g-o)/',  '^Useless \(\?g\).*\nUseless \(\?-o\)';
+        must_warn 'qr/(?g-c)/',  '^Useless \(\?g\).*\nUseless \(\?-c\)';
+        # (?c) means (?g) error won't be thrown
+        must_warn 'qr/(?o-cg)/', '^Useless \(\?o\).*\nUseless \(\?-c\)';
+        must_warn 'qr/(?ogc)/',  '^Useless \(\?o\).*\nUseless \(\?g\).*\n' .
+                                  'Useless \(\?c\)';
+    }
 
-    $x = "\x0" . "k";
-    ok ($x =~ /^[\xk]{2}$/,   "Check that invalid hex digit stops it (0)");
 
-    $x = "\x0" . "x";
-    ok ($x =~ /^[\xx]{2}$/, "\\xx isn't to be treated as \\0");
+    {
+        local $Message = "/x tests";
+        $_ = "foo";
+        eval_ok <<"        --";
+          /f
+           o\r
+           o
+           \$
+          /x
+        --
+        eval_ok <<"        --";
+          /f
+           o
+           o
+           \$\r
+          /x
+        --
+    }
 
-    $x = "\x0" . "xa";
-    ok ($x =~ /^[\xxa]{3}$/, "\\xxa isn't to be treated as \\xa");
 
-    $x = "\x9" . "_b";
-    ok ($x =~ /^[\x9_b]{3}$/, "\\x9_b isn't to be treated as \\x9b");
+    {
+        local $Message = "/o feature";
+        sub test_o {$_ [0] =~ /$_[1]/o; return $1}
+        iseq test_o ('abc', '(.)..'), 'a';
+        iseq test_o ('abc', '..(.)'), 'a';
+    }
 
-}
 
-{
-    # Check that \x{##} works. 5.6.1 fails quite a few of these.
+    {
+        local $BugId = "20010619.003";
+        # Amazingly vertical tabulator is the same in ASCII and EBCDIC.
+        for ("\n", "\t", "\014", "\r") {
+            ok !/[[:print:]]/, "'$_' not in [[:print:]]";
+        }
+        for (" ") {
+            ok  /[[:print:]]/, "'$_' in [[:print:]]";
+        }
+    }
 
-    $x = "\x9b";
-    ok ($x =~ /^\x{9_b}$/, "\\x{9_b} is to be treated as \\x9b");
 
-    $x = "\x9b" . "y";
-    ok ($x =~ /^\x{9_b}y$/, "\\x{9_b} is to be treated as \\x9b (again)");
+    {
+        # Test basic $^N usage outside of a regex
+        local $Message = '$^N usage outside of a regex';
+        my $x = "abcdef";
+        ok ($x =~ /cde/                  and !defined $^N);
+        ok ($x =~ /(cde)/                and $^N eq "cde");
+        ok ($x =~ /(c)(d)(e)/            and $^N eq   "e");
+        ok ($x =~ /(c(d)e)/              and $^N eq "cde");
+        ok ($x =~ /(foo)|(c(d)e)/        and $^N eq "cde");
+        ok ($x =~ /(c(d)e)|(foo)/        and $^N eq "cde");
+        ok ($x =~ /(c(d)e)|(abc)/        and $^N eq "abc");
+        ok ($x =~ /(c(d)e)|(abc)x/       and $^N eq "cde");
+        ok ($x =~ /(c(d)e)(abc)?/        and $^N eq "cde");
+        ok ($x =~ /(?:c(d)e)/            and $^N eq   "d");
+        ok ($x =~ /(?:c(d)e)(?:f)/       and $^N eq   "d");
+        ok ($x =~ /(?:([abc])|([def]))*/ and $^N eq   "f");
+        ok ($x =~ /(?:([ace])|([bdf]))*/ and $^N eq   "f");
+        ok ($x =~ /(([ace])|([bd]))*/    and $^N eq   "e");
+       {ok ($x =~ /(([ace])|([bdf]))*/   and $^N eq   "f");}
+        ## Test to see if $^N is automatically localized -- it should now
+        ## have the value set in the previous test.
+        iseq $^N, "e", '$^N is automatically localized';
+
+        # Now test inside (?{ ... })
+        local $Message = '$^N usage inside (?{ ... })';
+        our ($y, $z);
+        ok ($x =~ /a([abc])(?{$y=$^N})c/                    and $y eq  "b");
+        ok ($x =~ /a([abc]+)(?{$y=$^N})d/                   and $y eq  "bc");
+        ok ($x =~ /a([abcdefg]+)(?{$y=$^N})d/               and $y eq  "bc");
+        ok ($x =~ /(a([abcdefg]+)(?{$y=$^N})d)(?{$z=$^N})e/ and $y eq  "bc"
+                                                            and $z eq "abcd");
+        ok ($x =~ /(a([abcdefg]+)(?{$y=$^N})de)(?{$z=$^N})/ and $y eq  "bc"
+                                                            and $z eq "abcde");
 
-    $x = "\x9b" . "y";
-    ok ($x =~ /^\x{9b_}y$/, "\\x{9b_} is to be treated as \\x9b");
+    }
 
-    $x = "\x9b" . "y";
-    ok ($x =~ /^\x{9_bq}y$/, "\\x{9_bc} is to be treated as \\x9b");
 
-    $x = "\x0" . "y";
-    ok ($x =~ /^\x{x9b}y$/, "\\x{x9b} is to be treated as \\x0");
+  SKIP:
+    {
+        ## Should probably put in tests for all the POSIX stuff,
+        ## but not sure how to guarantee a specific locale......
 
-    $x = "\x0" . "y";
-    ok ($x =~ /^\x{0x9b}y$/, "\\x{0x9b} is to be treated as \\x0");
+        skip "Not an ASCII platform", 2 unless $IS_ASCII;
+        local $Message = 'Test [[:cntrl:]]';
+        my $AllBytes = join "" => map {chr} 0 .. 255;
+        (my $x = $AllBytes) =~ s/[[:cntrl:]]//g;
+        iseq $x, join "", map {chr} 0x20 .. 0x7E, 0x80 .. 0xFF;
 
-    $x = "\x9b" . "y";
-    ok ($x =~ /^\x{09b}y$/, "\\x{09b} is to be treated as \\x9b");
+        ($x = $AllBytes) =~ s/[^[:cntrl:]]//g;
+        iseq $x, join "", map {chr} 0x00 .. 0x1F, 0x7F;
+    }
 
-    print "# and now again in [] ranges\n";
 
-    $x = "\x9b";
-    ok ($x =~ /^[\x{9_b}]$/, "\\x{9_b} is to be treated as \\x9b");
+    {
+        # With /s modifier UTF8 chars were interpreted as bytes
+        local $Message = "UTF-8 chars aren't bytes";
+        my $a = "Hello \x{263A} World";
+        my @a = ($a =~ /./gs);
+        iseq $#a, 12;
+    }
 
-    $x = "\x9b" . "y";
-    ok ($x =~ /^[\x{9_b}y]{2}$/, "\\x{9_b} is to be treated as \\x9b (again)");
 
-    $x = "\x9b" . "y";
-    ok ($x =~ /^[\x{9b_}y]{2}$/, "\\x{9b_} is to be treated as \\x9b");
+    {
+        local $Message = '. matches \n with /s';
+        my $str1 = "foo\nbar";
+        my $str2 = "foo\n\x{100}bar";
+        my ($a, $b) = map {chr} $IS_ASCII ? (0xc4, 0x80) : (0x8c, 0x41);
+        my @a;
+        @a = $str1 =~ /./g;   iseq @a, 6; iseq "@a", "f o o b a r";
+        @a = $str1 =~ /./gs;  iseq @a, 7; iseq "@a", "f o o \n b a r";
+        @a = $str1 =~ /\C/g;  iseq @a, 7; iseq "@a", "f o o \n b a r";
+        @a = $str1 =~ /\C/gs; iseq @a, 7; iseq "@a", "f o o \n b a r";
+        @a = $str2 =~ /./g;   iseq @a, 7; iseq "@a", "f o o \x{100} b a r";
+        @a = $str2 =~ /./gs;  iseq @a, 8; iseq "@a", "f o o \n \x{100} b a r";
+        @a = $str2 =~ /\C/g;  iseq @a, 9; iseq "@a", "f o o \n $a $b b a r";
+        @a = $str2 =~ /\C/gs; iseq @a, 9; iseq "@a", "f o o \n $a $b b a r";
+    }
 
-    $x = "\x9b" . "y";
-    ok ($x =~ /^[\x{9_bq}y]{2}$/, "\\x{9_bc} is to be treated as \\x9b");
 
-    $x = "\x0" . "y";
-    ok ($x =~ /^[\x{x9b}y]{2}$/, "\\x{x9b} is to be treated as \\x0");
+    {
+        # [ID 20010814.004] pos() doesn't work when using =~m// in list context
+        local $BugId = '20010814.004';
+        $_ = "ababacadaea";
+        my $a = join ":", /b./gc;
+        my $b = join ":", /a./gc;
+        my $c = pos;
+        iseq "$a $b $c", 'ba:ba ad:ae 10', "pos() works with () = m//";
+    }
 
-    $x = "\x0" . "y";
-    ok ($x =~ /^[\x{0x9b}y]{2}$/, "\\x{0x9b} is to be treated as \\x0");
 
-    $x = "\x9b" . "y";
-    ok ($x =~ /^[\x{09b}y]{2}$/, "\\x{09b} is to be treated as \\x9b");
-}
+    {
+        # [ID 20010407.006] matching utf8 return values from
+        # functions does not work
+        local $BugId   = '20010407.006';
+        local $Message = 'UTF-8 return values from functions';
+        package ID_20010407_006;
+        sub x {"a\x{1234}"}
+        my $x = x;
+        my $y;
+      ::ok $x =~ /(..)/;
+        $y = $1;
+      ::ok length ($y) == 2 && $y eq $x;
+      ::ok x =~ /(..)/;
+        $y = $1;
+      ::ok length ($y) == 2 && $y eq $x;
+    }
 
-{
-    # high bit bug -- japhy
-    my $x = "ab\200d";
-    $x =~ /.*?\200/ or print "not ";
-    print "ok 715\n";
-}
 
-print "# some Unicode properties\n";
+    {
+        no warnings 'digit';
+        # Check that \x## works. 5.6.1 and 5.005_03 fail some of these.
+        my $x;
+        $x = "\x4e" . "E";
+        ok ($x =~ /^\x4EE$/, "Check only 2 bytes of hex are matched.");
 
-{
-    # Dashes, underbars, case.
-    print "not " unless "\x80" =~ /\p{in-latin1_SUPPLEMENT}/;
-    print "ok 716\n";
+        $x = "\x4e" . "i";
+        ok ($x =~ /^\x4Ei$/, "Check that invalid hex digit stops it (2)");
 
-    # Complement, leading and trailing whitespace.
-    print "not " unless "\x80" =~ /\P{  ^  In Latin 1 Supplement  }/;
-    print "ok 717\n";
+        $x = "\x4" . "j";
+        ok ($x =~ /^\x4j$/,  "Check that invalid hex digit stops it (1)");
 
-    # No ^In, dashes, case, dash, any intervening (word-break) whitespace.
-    # (well, newlines don't work...)
-    print "not " unless "\x80" =~ /\p{latin-1   supplement}/;
-    print "ok 718\n";
-}
+        $x = "\x0" . "k";
+        ok ($x =~ /^\xk$/,   "Check that invalid hex digit stops it (0)");
 
-{
-    print "not " unless "a" =~ /\pL/;
-    print "ok 719\n";
+        $x = "\x0" . "x";
+        ok ($x =~ /^\xx$/, "\\xx isn't to be treated as \\0");
 
-    print "not " unless "a" =~ /\p{IsLl}/;
-    print "ok 720\n";
+        $x = "\x0" . "xa";
+        ok ($x =~ /^\xxa$/, "\\xxa isn't to be treated as \\xa");
 
-    print "not " if     "a" =~ /\p{IsLu}/;
-    print "ok 721\n";
+        $x = "\x9" . "_b";
+        ok ($x =~ /^\x9_b$/, "\\x9_b isn't to be treated as \\x9b");
 
-    print "not " unless "a" =~ /\p{Ll}/;
-    print "ok 722\n";
+        # and now again in [] ranges
 
-    print "not " if     "a" =~ /\p{Lu}/;
-    print "ok 723\n";
+        $x = "\x4e" . "E";
+        ok ($x =~ /^[\x4EE]{2}$/, "Check only 2 bytes of hex are matched.");
 
-    print "not " unless "A" =~ /\pL/;
-    print "ok 724\n";
+        $x = "\x4e" . "i";
+        ok ($x =~ /^[\x4Ei]{2}$/, "Check that invalid hex digit stops it (2)");
 
-    print "not " unless "A" =~ /\p{IsLu}/;
-    print "ok 725\n";
+        $x = "\x4" . "j";
+        ok ($x =~ /^[\x4j]{2}$/,  "Check that invalid hex digit stops it (1)");
 
-    print "not " if     "A" =~ /\p{IsLl}/;
-    print "ok 726\n";
+        $x = "\x0" . "k";
+        ok ($x =~ /^[\xk]{2}$/,   "Check that invalid hex digit stops it (0)");
 
-    print "not " unless "A" =~ /\p{Lu}/;
-    print "ok 727\n";
+        $x = "\x0" . "x";
+        ok ($x =~ /^[\xx]{2}$/, "\\xx isn't to be treated as \\0");
 
-    print "not " if     "A" =~ /\p{Ll}/;
-    print "ok 728\n";
+        $x = "\x0" . "xa";
+        ok ($x =~ /^[\xxa]{3}$/, "\\xxa isn't to be treated as \\xa");
 
-    print "not " if     "a" =~ /\PL/;
-    print "ok 729\n";
+        $x = "\x9" . "_b";
+        ok ($x =~ /^[\x9_b]{3}$/, "\\x9_b isn't to be treated as \\x9b");
 
-    print "not " if     "a" =~ /\P{IsLl}/;
-    print "ok 730\n";
+        # Check that \x{##} works. 5.6.1 fails quite a few of these.
 
-    print "not " unless "a" =~ /\P{IsLu}/;
-    print "ok 731\n";
+        $x = "\x9b";
+        ok ($x =~ /^\x{9_b}$/, "\\x{9_b} is to be treated as \\x9b");
 
-    print "not " if     "a" =~ /\P{Ll}/;
-    print "ok 732\n";
+        $x = "\x9b" . "y";
+        ok ($x =~ /^\x{9_b}y$/, "\\x{9_b} is to be treated as \\x9b (again)");
 
-    print "not " unless "a" =~ /\P{Lu}/;
-    print "ok 733\n";
+        $x = "\x9b" . "y";
+        ok ($x =~ /^\x{9b_}y$/, "\\x{9b_} is to be treated as \\x9b");
 
-    print "not " if     "A" =~ /\PL/;
-    print "ok 734\n";
+        $x = "\x9b" . "y";
+        ok ($x =~ /^\x{9_bq}y$/, "\\x{9_bc} is to be treated as \\x9b");
 
-    print "not " if     "A" =~ /\P{IsLu}/;
-    print "ok 735\n";
+        $x = "\x0" . "y";
+        ok ($x =~ /^\x{x9b}y$/, "\\x{x9b} is to be treated as \\x0");
 
-    print "not " unless "A" =~ /\P{IsLl}/;
-    print "ok 736\n";
+        $x = "\x0" . "y";
+        ok ($x =~ /^\x{0x9b}y$/, "\\x{0x9b} is to be treated as \\x0");
 
-    print "not " if     "A" =~ /\P{Lu}/;
-    print "ok 737\n";
+        $x = "\x9b" . "y";
+        ok ($x =~ /^\x{09b}y$/, "\\x{09b} is to be treated as \\x9b");
 
-    print "not " unless "A" =~ /\P{Ll}/;
-    print "ok 738\n";
+        $x = "\x9b";
+        ok ($x =~ /^[\x{9_b}]$/, "\\x{9_b} is to be treated as \\x9b");
 
-}
+        $x = "\x9b" . "y";
+        ok ($x =~ /^[\x{9_b}y]{2}$/,
+                                 "\\x{9_b} is to be treated as \\x9b (again)");
 
-{
-    print "not " if     "a" =~ /\p{Common}/;
-    print "ok 739\n";
+        $x = "\x9b" . "y";
+        ok ($x =~ /^[\x{9b_}y]{2}$/, "\\x{9b_} is to be treated as \\x9b");
 
-    print "not " unless "1" =~ /\p{Common}/;
-    print "ok 740\n";
-}
+        $x = "\x9b" . "y";
+        ok ($x =~ /^[\x{9_bq}y]{2}$/, "\\x{9_bc} is to be treated as \\x9b");
 
-{
-    print "not " if     "a"       =~ /\p{Inherited}/;
-    print "ok 741\n";
+        $x = "\x0" . "y";
+        ok ($x =~ /^[\x{x9b}y]{2}$/, "\\x{x9b} is to be treated as \\x0");
 
-    print "not " unless "\x{300}" =~ /\p{Inherited}/;
-    print "ok 742\n";
-}
+        $x = "\x0" . "y";
+        ok ($x =~ /^[\x{0x9b}y]{2}$/, "\\x{0x9b} is to be treated as \\x0");
 
-{
-    # L& and LC are the same
-    print "not " unless "a" =~ /\p{LC}/ and "a" =~ /\p{L&}/;
-    print "ok 743\n";
+        $x = "\x9b" . "y";
+        ok ($x =~ /^[\x{09b}y]{2}$/, "\\x{09b} is to be treated as \\x9b");
 
-    print "not " if     "1" =~ /\p{LC}/ or "1" =~ /\p{L&}/;
-    print "ok 744\n";
-}
+    }
+
+
+    {
+        # High bit bug -- japhy
+        my $x = "ab\200d";
+        ok $x =~ /.*?\200/, "High bit fine";
+    }
+
+
+    {
+        # The basic character classes and Unicode
+        ok "\x{0100}" =~ /\w/, 'LATIN CAPITAL LETTER A WITH MACRON in /\w/';
+        ok "\x{0660}" =~ /\d/, 'ARABIC-INDIC DIGIT ZERO in /\d/';
+        ok "\x{1680}" =~ /\s/, 'OGHAM SPACE MARK in /\s/';
+    }
+
+
+    {
+        local $Message = "Folding matches and Unicode";
+        ok "a\x{100}" =~ /A/i;
+        ok "A\x{100}" =~ /a/i;
+        ok "a\x{100}" =~ /a/i;
+        ok "A\x{100}" =~ /A/i;
+        ok "\x{101}a" =~ /\x{100}/i;
+        ok "\x{100}a" =~ /\x{100}/i;
+        ok "\x{101}a" =~ /\x{101}/i;
+        ok "\x{100}a" =~ /\x{101}/i;
+        ok "a\x{100}" =~ /A\x{100}/i;
+        ok "A\x{100}" =~ /a\x{100}/i;
+        ok "a\x{100}" =~ /a\x{100}/i;
+        ok "A\x{100}" =~ /A\x{100}/i;
+        ok "a\x{100}" =~ /[A]/i;
+        ok "A\x{100}" =~ /[a]/i;
+        ok "a\x{100}" =~ /[a]/i;
+        ok "A\x{100}" =~ /[A]/i;
+        ok "\x{101}a" =~ /[\x{100}]/i;
+        ok "\x{100}a" =~ /[\x{100}]/i;
+        ok "\x{101}a" =~ /[\x{101}]/i;
+        ok "\x{100}a" =~ /[\x{101}]/i;
+    }
+
+
+    {
+        use charnames ':full';
+        local $Message = "Folding 'LATIN LETTER A WITH GRAVE'";
+
+        my $lower = "\N{LATIN SMALL LETTER A WITH GRAVE}";
+        my $UPPER = "\N{LATIN CAPITAL LETTER A WITH GRAVE}";
+        
+        ok $lower =~ m/$UPPER/i;
+        ok $UPPER =~ m/$lower/i;
+        ok $lower =~ m/[$UPPER]/i;
+        ok $UPPER =~ m/[$lower]/i;
+
+        local $Message = "Folding 'GREEK LETTER ALPHA WITH VRACHY'";
+
+        $lower = "\N{GREEK CAPITAL LETTER ALPHA WITH VRACHY}";
+        $UPPER = "\N{GREEK SMALL LETTER ALPHA WITH VRACHY}";
+
+        ok $lower =~ m/$UPPER/i;
+        ok $UPPER =~ m/$lower/i;
+        ok $lower =~ m/[$UPPER]/i;
+        ok $UPPER =~ m/[$lower]/i;
+
+        local $Message = "Folding 'LATIN LETTER Y WITH DIAERESIS'";
+
+        $lower = "\N{LATIN SMALL LETTER Y WITH DIAERESIS}";
+        $UPPER = "\N{LATIN CAPITAL LETTER Y WITH DIAERESIS}";
+
+        ok $lower =~ m/$UPPER/i;
+        ok $UPPER =~ m/$lower/i;
+        ok $lower =~ m/[$UPPER]/i;
+        ok $UPPER =~ m/[$lower]/i;
+    }
+
+
+    {
+        use charnames ':full';
+        local $PatchId = "13843";
+        local $Message = "GREEK CAPITAL LETTER SIGMA vs " .
+                         "COMBINING GREEK PERISPOMENI";
+
+        my $SIGMA = "\N{GREEK CAPITAL LETTER SIGMA}";
+        my $char  = "\N{COMBINING GREEK PERISPOMENI}";
+
+        may_not_warn sub {ok "_:$char:_" !~ m/_:$SIGMA:_/i};
+    }
+
+
+    {
+        local $Message = '\X';
+        use charnames ':full';
+
+        ok "a!"                          =~ /^(\X)!/ && $1 eq "a";
+        ok "\xDF!"                       =~ /^(\X)!/ && $1 eq "\xDF";
+        ok "\x{100}!"                    =~ /^(\X)!/ && $1 eq "\x{100}";
+        ok "\x{100}\x{300}!"             =~ /^(\X)!/ && $1 eq "\x{100}\x{300}";
+        ok "\N{LATIN CAPITAL LETTER E}!" =~ /^(\X)!/ &&
+               $1 eq "\N{LATIN CAPITAL LETTER E}";
+        ok "\N{LATIN CAPITAL LETTER E}\N{COMBINING GRAVE ACCENT}!"
+                                         =~ /^(\X)!/ &&
+               $1 eq "\N{LATIN CAPITAL LETTER E}\N{COMBINING GRAVE ACCENT}";
+
+        local $Message = '\C and \X';
+        ok "!abc!" =~ /a\Cc/;
+        ok "!abc!" =~ /a\Xc/;
+    }
+
+
+    {
+        local $Message = "Final Sigma";
+
+        my $SIGMA = "\x{03A3}"; # CAPITAL
+        my $Sigma = "\x{03C2}"; # SMALL FINAL
+        my $sigma = "\x{03C3}"; # SMALL
+
+        ok $SIGMA =~ /$SIGMA/i;
+        ok $SIGMA =~ /$Sigma/i;
+        ok $SIGMA =~ /$sigma/i;
+
+        ok $Sigma =~ /$SIGMA/i;
+        ok $Sigma =~ /$Sigma/i;
+        ok $Sigma =~ /$sigma/i;
+
+        ok $sigma =~ /$SIGMA/i;
+        ok $sigma =~ /$Sigma/i;
+        ok $sigma =~ /$sigma/i;
+        
+        ok $SIGMA =~ /[$SIGMA]/i;
+        ok $SIGMA =~ /[$Sigma]/i;
+        ok $SIGMA =~ /[$sigma]/i;
+
+        ok $Sigma =~ /[$SIGMA]/i;
+        ok $Sigma =~ /[$Sigma]/i;
+        ok $Sigma =~ /[$sigma]/i;
+
+        ok $sigma =~ /[$SIGMA]/i;
+        ok $sigma =~ /[$Sigma]/i;
+        ok $sigma =~ /[$sigma]/i;
+
+        local $Message = "More final Sigma";
+
+        my $S3 = "$SIGMA$Sigma$sigma";
+
+        ok ":$S3:" =~ /:(($SIGMA)+):/i   && $1 eq $S3 && $2 eq $sigma;
+        ok ":$S3:" =~ /:(($Sigma)+):/i   && $1 eq $S3 && $2 eq $sigma;
+        ok ":$S3:" =~ /:(($sigma)+):/i   && $1 eq $S3 && $2 eq $sigma;
+
+        ok ":$S3:" =~ /:(([$SIGMA])+):/i && $1 eq $S3 && $2 eq $sigma;
+        ok ":$S3:" =~ /:(([$Sigma])+):/i && $1 eq $S3 && $2 eq $sigma;
+        ok ":$S3:" =~ /:(([$sigma])+):/i && $1 eq $S3 && $2 eq $sigma;
+    }
+
+
+    {
+        use charnames ':full';
+        local $Message = "Parlez-Vous " .
+                         "Fran\N{LATIN SMALL LETTER C WITH CEDILLA}ais?";
+
+        ok "Fran\N{LATIN SMALL LETTER C}ais" =~ /Fran.ais/ &&
+            $& eq "Francais";
+        ok "Fran\N{LATIN SMALL LETTER C WITH CEDILLA}ais" =~ /Fran.ais/ &&
+            $& eq "Fran\N{LATIN SMALL LETTER C WITH CEDILLA}ais";
+        ok "Fran\N{LATIN SMALL LETTER C}ais" =~ /Fran\Cais/ &&
+            $& eq "Francais";
+        # COMBINING CEDILLA is two bytes when encoded
+        ok "Franc\N{COMBINING CEDILLA}ais" =~ /Franc\C\Cais/;
+        ok "Fran\N{LATIN SMALL LETTER C}ais" =~ /Fran\Xais/ &&
+            $& eq "Francais";
+        ok "Fran\N{LATIN SMALL LETTER C WITH CEDILLA}ais" =~ /Fran\Xais/  &&
+            $& eq "Fran\N{LATIN SMALL LETTER C WITH CEDILLA}ais";
+        ok "Franc\N{COMBINING CEDILLA}ais" =~ /Fran\Xais/ &&
+            $& eq "Franc\N{COMBINING CEDILLA}ais";
+        ok "Fran\N{LATIN SMALL LETTER C WITH CEDILLA}ais" =~
+           /Fran\N{LATIN SMALL LETTER C WITH CEDILLA}ais/  &&
+            $& eq "Fran\N{LATIN SMALL LETTER C WITH CEDILLA}ais";
+        ok "Franc\N{COMBINING CEDILLA}ais" =~ /Franc\N{COMBINING CEDILLA}ais/ &&
+            $& eq "Franc\N{COMBINING CEDILLA}ais";
+
+        my @f = (
+            ["Fran\N{LATIN SMALL LETTER C}ais",                    "Francais"],
+            ["Fran\N{LATIN SMALL LETTER C WITH CEDILLA}ais",
+                               "Fran\N{LATIN SMALL LETTER C WITH CEDILLA}ais"],
+            ["Franc\N{COMBINING CEDILLA}ais", "Franc\N{COMBINING CEDILLA}ais"],
+        );
+        foreach my $entry (@f) {
+            my ($subject, $match) = @$entry;
+            ok $subject =~ /Fran(?:c\N{COMBINING CEDILLA}?|
+                    \N{LATIN SMALL LETTER C WITH CEDILLA})ais/x &&
+               $& eq $match;
+        }
+    }
+
+
+    {
+        local $Message = "Lingering (and useless) UTF8 flag doesn't mess up /i";
+        my $pat = "ABcde";
+        my $str = "abcDE\x{100}";
+        chop $str;
+        ok $str =~ /$pat/i;
+
+        $pat = "ABcde\x{100}";
+        $str = "abcDE";
+        chop $pat;
+        ok $str =~ /$pat/i;
+
+        $pat = "ABcde\x{100}";
+        $str = "abcDE\x{100}";
+        chop $pat;
+        chop $str;
+        ok $str =~ /$pat/i;
+    }
+
+
+    {
+        use charnames ':full';
+        local $Message = "LATIN SMALL LETTER SHARP S " .
+                         "(\N{LATIN SMALL LETTER SHARP S})";
+
+        ok "\N{LATIN SMALL LETTER SHARP S}" =~
+                                            /\N{LATIN SMALL LETTER SHARP S}/;
+        ok "\N{LATIN SMALL LETTER SHARP S}" =~
+                                            /\N{LATIN SMALL LETTER SHARP S}/i;
+        ok "\N{LATIN SMALL LETTER SHARP S}" =~
+                                           /[\N{LATIN SMALL LETTER SHARP S}]/;
+        ok "\N{LATIN SMALL LETTER SHARP S}" =~
+                                           /[\N{LATIN SMALL LETTER SHARP S}]/i;
+
+        ok "ss" =~  /\N{LATIN SMALL LETTER SHARP S}/i;
+        ok "SS" =~  /\N{LATIN SMALL LETTER SHARP S}/i;
+        ok "ss" =~ /[\N{LATIN SMALL LETTER SHARP S}]/i;
+        ok "SS" =~ /[\N{LATIN SMALL LETTER SHARP S}]/i;
+
+        ok "\N{LATIN SMALL LETTER SHARP S}" =~ /ss/i;
+        ok "\N{LATIN SMALL LETTER SHARP S}" =~ /SS/i;
+ 
+        local $Message = "Unoptimized named sequence in class";
+        ok "ss" =~ /[\N{LATIN SMALL LETTER SHARP S}x]/i;
+        ok "SS" =~ /[\N{LATIN SMALL LETTER SHARP S}x]/i;
+        ok "\N{LATIN SMALL LETTER SHARP S}" =~
+          /[\N{LATIN SMALL LETTER SHARP S}x]/;
+        ok "\N{LATIN SMALL LETTER SHARP S}" =~
+          /[\N{LATIN SMALL LETTER SHARP S}x]/i;
+    }
+
+
+    {
+        # More whitespace: U+0085, U+2028, U+2029\n";
+
+        # U+0085, U+00A0 need to be forced to be Unicode, the \x{100} does that.
+      SKIP: {
+          skip "EBCDIC platform", 4 if $IS_EBCDIC;
+          # Do \x{0015} and \x{0041} match \s in EBCDIC?
+          ok "<\x{100}\x{0085}>" =~ /<\x{100}\s>/, '\x{0085} in \s';
+          ok        "<\x{0085}>" =~        /<\v>/, '\x{0085} in \v';
+          ok "<\x{100}\x{00A0}>" =~ /<\x{100}\s>/, '\x{00A0} in \s';
+          ok        "<\x{00A0}>" =~        /<\h>/, '\x{00A0} in \h';
+        }
+        my @h = map {sprintf "%05x" => $_} 0x01680, 0x0180E, 0x02000 .. 0x0200A,
+                                           0x0202F, 0x0205F, 0x03000;
+        my @v = map {sprintf "%05x" => $_} 0x02028, 0x02029;
+
+        my @H = map {sprintf "%05x" => $_} 0x01361,   0x0200B, 0x02408, 0x02420,
+                                           0x0303F,   0xE0020;
+        my @V = map {sprintf "%05x" => $_} 0x0008A .. 0x0008D, 0x00348, 0x10100,
+                                           0xE005F,   0xE007C;
+
+        for my $hex (@h) {
+            my $str = eval qq ["<\\x{$hex}>"];
+            ok $str =~ /<\s>/, "\\x{$hex} in \\s";
+            ok $str =~ /<\h>/, "\\x{$hex} in \\h";
+            ok $str !~ /<\v>/, "\\x{$hex} not in \\v";
+        }
+
+        for my $hex (@v) {
+            my $str = eval qq ["<\\x{$hex}>"];
+            ok $str =~ /<\s>/, "\\x{$hex} in \\s";
+            ok $str =~ /<\v>/, "\\x{$hex} in \\v";
+            ok $str !~ /<\h>/, "\\x{$hex} not in \\h";
+        }
+
+        for my $hex (@H) {
+            my $str = eval qq ["<\\x{$hex}>"];
+            ok $str =~ /<\S>/, "\\x{$hex} in \\S";
+            ok $str =~ /<\H>/, "\\x{$hex} in \\H";
+        }
+
+        for my $hex (@V) {
+            my $str = eval qq ["<\\x{$hex}>"];
+            ok $str =~ /<\S>/, "\\x{$hex} in \\S";
+            ok $str =~ /<\V>/, "\\x{$hex} in \\V";
+        }
+    }
+
+
+    {
+        # . with /s should work on characters, as opposed to bytes
+        local $Message = ". with /s works on characters, not bytes";
+
+        my $s = "\x{e4}\x{100}";
+        # This is not expected to match: the point is that
+        # neither should we get "Malformed UTF-8" warnings.
+        may_not_warn sub {$s =~ /\G(.+?)\n/gcs}, "No 'Malformed UTF-8' warning";
+
+        my @c;
+        push @c => $1 while $s =~ /\G(.)/gs;
+
+        local $" = "";
+        iseq "@c", $s;
+
+        # Test only chars < 256
+        my $t1 = "Q003\n\n\x{e4}\x{f6}\n\nQ004\n\n\x{e7}";
+        my $r1 = "";
+        while ($t1 =~ / \G ( .+? ) \n\s+ ( .+? ) ( $ | \n\s+ ) /xgcs) {
+	    $r1 .= $1 . $2;
+        }
+
+        my $t2 = $t1 . "\x{100}"; # Repeat with a larger char
+        my $r2 = "";
+        while ($t2 =~ / \G ( .+? ) \n\s+ ( .+? ) ( $ | \n\s+ ) /xgcs) {
+	    $r2 .= $1 . $2;
+        }
+        $r2 =~ s/\x{100}//;
+
+        iseq $r1, $r2;
+    }
+
+
+    {
+        local $Message = "Unicode lookbehind";
+        ok "A\x{100}B"        =~ /(?<=A.)B/;
+        ok "A\x{200}\x{300}B" =~ /(?<=A..)B/;
+        ok "\x{400}AB"        =~ /(?<=\x{400}.)B/;
+        ok "\x{500}\x{600}B"  =~ /(?<=\x{500}.)B/;
+
+        # Original code also contained:
+        # ok "\x{500\x{600}}B"  =~ /(?<=\x{500}.)B/;
+        # but that looks like a typo.
+    }
+
+
+    {
+        local $Message = 'UTF-8 hash keys and /$/';
+        # http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters
+        #                                         /2002-01/msg01327.html
+
+        my $u = "a\x{100}";
+        my $v = substr ($u, 0, 1);
+        my $w = substr ($u, 1, 1);
+        my %u = ($u => $u, $v => $v, $w => $w);
+        for (keys %u) {
+            my $m1 =            /^\w*$/ ? 1 : 0;
+            my $m2 = $u {$_} =~ /^\w*$/ ? 1 : 0;
+            iseq $m1, $m2;
+        }
+    }
+
+
+    {
+        local $BugId   = "20020124.005";
+        local $PatchId = "14795";
+        local $Message = "s///eg";
+
+        for my $char ("a", "\x{df}", "\x{100}") {
+            my $x = "$char b $char";
+            $x =~ s{($char)}{
+                  "c" =~ /c/;
+                  "x";
+            }ge;
+            iseq substr ($x, 0, 1), substr ($x, -1, 1);
+        }
+    }
+
+
+    {
+        local $Message = "No SEGV in s/// and UTF-8";
+        my $s = "s#\x{100}" x 4;
+        ok $s =~ s/[^\w]/ /g;
+        if ($ENV {REAL_POSIX_CC}) {
+            iseq $s, "s  " x 4;
+        }
+        else {
+            iseq $s, "s \x{100}" x 4;
+        }
+    }
+
+
+    {
+        local $Message = "UTF-8 bug (maybe already known?)";
+        my $u = "foo";
+        $u =~ s/./\x{100}/g;
+        iseq $u, "\x{100}\x{100}\x{100}";
+
+        $u = "foobar";
+        $u =~ s/[ao]/\x{100}/g;
+        iseq $u, "f\x{100}\x{100}b\x{100}r";
+
+        $u =~ s/\x{100}/e/g;
+        iseq $u, "feeber";
+    }
+
+
+    {
+        local $Message = "UTF-8 bug with s///";
+        # check utf8/non-utf8 mixtures
+        # try to force all float/anchored check combinations
+
+        my $c = "\x{100}";
+        my $subst;
+        for my $re ("xx.*$c", "x.*$c$c", "$c.*xx", "$c$c.*x",
+                    "xx.*(?=$c)", "(?=$c).*xx",) {
+            ok "xxx" !~ /$re/;
+            ok +($subst = "xxx") !~ s/$re//;
+        }
+        for my $re ("xx.*$c*", "$c*.*xx") {
+            ok "xxx" =~ /$re/;
+            ok +($subst = "xxx") =~ s/$re//;
+            iseq $subst, "";
+        }
+        for my $re ("xxy*", "y*xx") {
+            ok "xx$c" =~ /$re/;
+            ok +($subst = "xx$c") =~ s/$re//;
+            iseq $subst, $c;
+            ok "xy$c" !~ /$re/;
+            ok +($subst = "xy$c") !~ s/$re//;
+        }
+        for my $re ("xy$c*z", "x$c*yz") {
+            ok "xyz" =~ /$re/;
+            ok +($subst = "xyz") =~ s/$re//;
+            iseq $subst, "";
+        }
+    }
+
+
+    {
+        local $Message = "qr /.../x";
+        my $R = qr / A B C # D E/x;
+        ok "ABCDE" =~    $R   && $& eq "ABC";
+        ok "ABCDE" =~   /$R/  && $& eq "ABC";
+        ok "ABCDE" =~  m/$R/  && $& eq "ABC";
+        ok "ABCDE" =~  /($R)/ && $1 eq "ABC";
+        ok "ABCDE" =~ m/($R)/ && $1 eq "ABC";
+    }
+
+
+    {
+        local $BugId = "20020412.005";
+        local $Message = "Correct pmop flags checked when empty pattern";
+
+        # Requires reuse of last successful pattern.
+        my $num = 123;
+        $num =~ /\d/;
+        for (0 .. 1) {
+            my $match = ?? + 0;
+            ok $match != $_, $Message, 
+                sprintf "'match one' %s on %s iteration" =>
+                               $match ? 'succeeded' : 'failed',
+                               $_     ? 'second'    : 'first';
+        }
+        $num =~ /(\d)/;
+        my $result = join "" => $num =~ //g;
+        iseq $result, $num;
+    }
+
+
+    {
+        local $BugId   = '20020630.002';
+        local $Message = 'UTF-8 regex matches above 32k';
+        for (['byte', "\x{ff}"], ['utf8', "\x{1ff}"]) {
+            my ($type, $char) = @$_;
+            for my $len (32000, 32768, 33000) {
+                my  $s = $char . "f" x $len;
+                my  $r = $s =~ /$char([f]*)/gc;
+                ok  $r, $Message, "<$type x $len>";
+                ok !$r || pos ($s) == $len + 1, $Message,
+                        "<$type x $len>; pos = @{[pos $s]}";
+            }
+        }
+    }
+
+
+    {
+        our $a = bless qr /foo/ => 'Foo';
+        ok 'goodfood' =~ $a,     "Reblessed qr // matches";
+        iseq $a, '(?-xism:foo)', "Reblessed qr // stringifies";
+        my $x = "\x{3fe}";
+        my $z = my $y = "\317\276";  # Byte representation of $x
+        $a = qr /$x/;
+        ok $x =~ $a, "UTF-8 interpolation in qr //";
+        ok "a$a" =~ $x, "Stringified qr // preserves UTF-8";
+        ok "a$x" =~ /^a$a\z/, "Interpolated qr // preserves UTF-8";
+        ok "a$x" =~ /^a(??{$a})\z/,
+                        "Postponed interpolation of qr // preserves UTF-8";
+        {
+            local $BugId = '17776';
+            iseq length qr /##/x, 12, "## in qr // doesn't corrupt memory";
+        }
+        {
+            use re 'eval';
+            ok "$x$x" =~ /^$x(??{$x})\z/,
+               "Postponed UTF-8 string in UTF-8 re matches UTF-8";
+            ok "$y$x" =~ /^$y(??{$x})\z/, 
+               "Postponed UTF-8 string in non-UTF-8 re matches UTF-8";
+            ok "$y$x" !~ /^$y(??{$y})\z/,
+               "Postponed non-UTF-8 string in non-UTF-8 re doesn't match UTF-8";
+            ok "$x$x" !~ /^$x(??{$y})\z/,
+               "Postponed non-UTF-8 string in UTF-8 re doesn't match UTF-8";
+            ok "$y$y" =~ /^$y(??{$y})\z/,
+               "Postponed non-UTF-8 string in non-UTF-8 re matches non-UTF8";
+            ok "$x$y" =~ /^$x(??{$y})\z/,
+               "Postponed non-UTF-8 string in UTF-8 re matches non-UTF8";
+
+            $y = $z;  # Reset $y after upgrade.
+            ok "$x$y" !~ /^$x(??{$x})\z/,
+               "Postponed UTF-8 string in UTF-8 re doesn't match non-UTF-8";
+            ok "$y$y" !~ /^$y(??{$x})\z/,
+               "Postponed UTF-8 string in non-UTF-8 re doesn't match non-UTF-8";
+        }
+    }
+
+
+    {
+        local $PatchId = '18179';
+        my $s = "\x{100}" x 5;
+        my $ok = $s =~ /(\x{100}{4})/;
+        my ($ord, $len) = (ord $1, length $1);
+        ok $ok && $ord == 0x100 && $len == 4, "No panic: end_shift";
+    }
+
+
+    {
+        local $BugId = '15763';
+        our $a = "x\x{100}";
+        chop $a;    # Leaves the UTF-8 flag
+        $a .= "y";  # 1 byte before 'y'.
+
+        ok $a =~ /^\C/,        'match one \C on 1-byte UTF-8';
+        ok $a =~ /^\C{1}/,     'match \C{1}';
+
+        ok $a =~ /^\Cy/,       'match \Cy';
+        ok $a =~ /^\C{1}y/,    'match \C{1}y';
+
+        ok $a !~ /^\C\Cy/,     q {don't match two \Cy};
+        ok $a !~ /^\C{2}y/,    q {don't match \C{2}y};
+
+        $a = "\x{100}y"; # 2 bytes before "y"
+
+        ok $a =~ /^\C/,        'match one \C on 2-byte UTF-8';
+        ok $a =~ /^\C{1}/,     'match \C{1}';
+        ok $a =~ /^\C\C/,      'match two \C';
+        ok $a =~ /^\C{2}/,     'match \C{2}';
+
+        ok $a =~ /^\C\C\C/,    'match three \C on 2-byte UTF-8 and a byte';
+        ok $a =~ /^\C{3}/,     'match \C{3}';
+
+        ok $a =~ /^\C\Cy/,     'match two \C';
+        ok $a =~ /^\C{2}y/,    'match \C{2}';
+
+        ok $a !~ /^\C\C\Cy/,   q {don't match three \Cy};
+        ok $a !~ /^\C{2}\Cy/,  q {don't match \C{2}\Cy};
+        ok $a !~ /^\C{3}y/,    q {don't match \C{3}y};
+
+        $a = "\x{1000}y"; # 3 bytes before "y"
+
+        ok $a =~ /^\C/,        'match one \C on three-byte UTF-8';
+        ok $a =~ /^\C{1}/,     'match \C{1}';
+        ok $a =~ /^\C\C/,      'match two \C';
+        ok $a =~ /^\C{2}/,     'match \C{2}';
+        ok $a =~ /^\C\C\C/,    'match three \C';
+        ok $a =~ /^\C{3}/,     'match \C{3}';
+
+        ok $a =~ /^\C\C\C\C/,  'match four \C on three-byte UTF-8 and a byte';
+        ok $a =~ /^\C{4}/,     'match \C{4}';
+
+        ok $a =~ /^\C\C\Cy/,   'match three \Cy';
+        ok $a =~ /^\C{3}y/,    'match \C{3}y';
+
+        ok $a !~ /^\C\C\C\Cy/, q {don't match four \Cy};
+        ok $a !~ /^\C{4}y/,    q {don't match \C{4}y};
+    }
+
+    
+    {
+        local $\;
+        $_ = 'aaaaaaaaaa';
+        utf8::upgrade($_); chop $_; $\="\n";
+        ok /[^\s]+/, 'm/[^\s]/ utf8';
+        ok /[^\d]+/, 'm/[^\d]/ utf8';
+        ok +($a = $_, $_ =~ s/[^\s]+/./g), 's/[^\s]/ utf8';
+        ok +($a = $_, $a =~ s/[^\d]+/./g), 's/[^\s]/ utf8';
+    }
+
+
+    {
+        local $BugId   = '15397';
+        local $Message = 'UTF-8 matching';
+        ok "\x{100}" =~ /\x{100}/;
+        ok "\x{100}" =~ /(\x{100})/;
+        ok "\x{100}" =~ /(\x{100}){1}/;
+        ok "\x{100}\x{100}" =~ /(\x{100}){2}/;
+        ok "\x{100}\x{100}" =~ /(\x{100})(\x{100})/;
+    }
+
+
+    {
+        local $BugId   = '7471';
+        local $Message = 'Neither ()* nor ()*? sets $1 when matched 0 times';
+        local $_       = 'CD';
+        ok /(AB)*?CD/ && !defined $1;
+        ok /(AB)*CD/  && !defined $1;
+    }
 
-{
-    print "not " unless "a" =~ /\p{Lowercase Letter}/;
-    print "ok 745\n";
 
-    print "not " if     "A" =~ /\p{lowercaseletter}/;
-    print "ok 746\n";
-}
+    {
+        local $BugId   = '3547';
+        local $Message = "Caching shouldn't prevent match";
+        my $pattern = "^(b+?|a){1,2}c";
+        ok "bac"    =~ /$pattern/ && $1 eq 'a';
+        ok "bbac"   =~ /$pattern/ && $1 eq 'a';
+        ok "bbbac"  =~ /$pattern/ && $1 eq 'a';
+        ok "bbbbac" =~ /$pattern/ && $1 eq 'a';
+    }
 
-{
-    print "not " unless "\x{AC00}" =~ /\p{HangulSyllables}/;
-    print "ok 747\n";
-}
 
-{
-    # Script=, Block=, Category=
 
-    print "not " unless "\x{0100}" =~ /\p{Script=Latin}/;
-    print "ok 748\n";
+    {
+        local $BugId   = '18232';
+        local $Message = '$1 should keep UTF-8 ness';
+        ok "\x{100}" =~ /(.)/;
+        iseq  $1, "\x{100}",  '$1 is UTF-8';
+        { 'a' =~ /./; }
+        iseq  $1, "\x{100}",  '$1 is still UTF-8';
+        isneq $1, "\xC4\x80", '$1 is not non-UTF-8';
+    }
 
-    print "not " unless "\x{0100}" =~ /\p{Block=LatinExtendedA}/;
-    print "ok 749\n";
 
-    print "not " unless "\x{0100}" =~ /\p{Category=UppercaseLetter}/;
-    print "ok 750\n";
-}
+    {
+        local $BugId   = '19767';
+        local $Message = "Optimizer doesn't prematurely reject match";
+        use utf8;
 
-{
-    print "# the basic character classes and Unicode \n";
+        my $attr = 'Name-1';
+        my $NormalChar      = qr /[\p{IsDigit}\p{IsLower}\p{IsUpper}]/;
+        my $NormalWord      = qr /${NormalChar}+?/;
+        my $PredNameHyphen  = qr /^${NormalWord}(\-${NormalWord})*?$/;
 
-    # 0100;LATIN CAPITAL LETTER A WITH MACRON;Lu;0;L;0041 0304;;;;N;LATIN CAPITAL LETTER A MACRON;;;0101;
-    print "not " unless "\x{0100}" =~ /\w/;
-    print "ok 751\n";
+        $attr =~ /^$/;
+        ok $attr =~ $PredNameHyphen;  # Original test.
 
-    # 0660;ARABIC-INDIC DIGIT ZERO;Nd;0;AN;;0;0;0;N;;;;;
-    print "not " unless "\x{0660}" =~ /\d/;
-    print "ok 752\n";
+        "a" =~ m/[b]/;
+        ok "0" =~ /\p{N}+\z/;         # Variant.
+    }
 
-    # 1680;OGHAM SPACE MARK;Zs;0;WS;;;;;N;;;;;
-    print "not " unless "\x{1680}" =~ /\s/;
-    print "ok 753\n";
-}
 
-{
-    print "# folding matches and Unicode\n";
+    {
+        local $BugId   = '20683';
+        local $Message = "(??{ }) doesn't return stale values";
+        our $p = 1;
+        foreach (1, 2, 3, 4) {
+            $p ++ if /(??{ $p })/
+        }
+        iseq $p, 5;
+
+        {
+            package P;
+            $a = 1;
+            sub TIESCALAR {bless []}
+            sub FETCH     {$a ++}
+        }
+        tie $p, "P";
+        foreach (1, 2, 3, 4) {
+            /(??{ $p })/
+        }
+        iseq $p, 5;
+    }
 
-    print "not " unless "a\x{100}" =~ /A/i;
-    print "ok 754\n";
 
-    print "not " unless "A\x{100}" =~ /a/i;
-    print "ok 755\n";
+    {
+        # Subject: Odd regexp behavior
+        # From: Markus Kuhn <Markus.Kuhn@cl.cam.ac.uk>
+        # Date: Wed, 26 Feb 2003 16:53:12 +0000
+        # Message-Id: <E18o4nw-0008Ly-00@wisbech.cl.cam.ac.uk>
+        # To: perl-unicode@perl.org
 
-    print "not " unless "a\x{100}" =~ /a/i;
-    print "ok 756\n";
+        local $Message = 'Markus Kuhn 2003-02-26';
+    
+        my $x = "\x{2019}\nk";
+        ok $x =~ s/(\S)\n(\S)/$1 $2/sg;
+        ok $x eq "\x{2019} k";
 
-    print "not " unless "A\x{100}" =~ /A/i;
-    print "ok 757\n";
+        $x = "b\nk";
+        ok $x =~ s/(\S)\n(\S)/$1 $2/sg;
+        ok $x eq "b k";
 
-    print "not " unless "\x{101}a" =~ /\x{100}/i;
-    print "ok 758\n";
+        ok "\x{2019}" =~ /\S/;
+    }
 
-    print "not " unless "\x{100}a" =~ /\x{100}/i;
-    print "ok 759\n";
 
-    print "not " unless "\x{101}a" =~ /\x{101}/i;
-    print "ok 760\n";
+    {
+        local $BugId = '21411';
+        local $Message = "(??{ .. }) in split doesn't corrupt its stack";
+        our $i;
+        ok '-1-3-5-' eq join '', split /((??{$i++}))/, '-1-3-5-';
+        no warnings 'deprecated', 'syntax';
+        split /(?{'WOW'})/, 'abc';
+        local $" = "|";
+        iseq "@_", "a|b|c";
+    }
 
-    print "not " unless "\x{100}a" =~ /\x{101}/i;
-    print "ok 761\n";
 
-    print "not " unless "a\x{100}" =~ /A\x{100}/i;
-    print "ok 762\n";
+    {
+        # XXX DAPM 13-Apr-06. Recursive split is still broken. It's only luck it
+        # hasn't been crashing. Disable this test until it is fixed properly.
+        # XXX also check what it returns rather than just doing ok(1,...)
+        # split /(?{ split "" })/, "abc";
+        local $TODO = "Recursive split is still broken";
+        ok 0, 'cache_re & "(?{": it dumps core in 5.6.1 & 5.8.0';
+    }
 
-    print "not " unless "A\x{100}" =~ /a\x{100}/i;
-    print "ok 763\n";
 
-    print "not " unless "a\x{100}" =~ /a\x{100}/i;
-    print "ok 764\n";
+    {
+        ok "\x{100}\n" =~ /\x{100}\n$/, "UTF-8 length cache and fbm_compile";
+    }
 
-    print "not " unless "A\x{100}" =~ /A\x{100}/i;
-    print "ok 765\n";
 
-    print "not " unless "a\x{100}" =~ /[A]/i;
-    print "ok 766\n";
+    {
+        package Str;
+        use overload q /""/ => sub {${$_ [0]};};
+        sub new {my ($c, $v) = @_; bless \$v, $c;}
 
-    print "not " unless "A\x{100}" =~ /[a]/i;
-    print "ok 767\n";
+        package main;
+        $_ = Str -> new ("a\x{100}/\x{100}b");
+        ok join (":", /\b(.)\x{100}/g) eq "a:/", "re_intuit_start and PL_bostr";
+    }
 
-    print "not " unless "a\x{100}" =~ /[a]/i;
-    print "ok 768\n";
 
-    print "not " unless "A\x{100}" =~ /[A]/i;
-    print "ok 769\n";
+    {
+        local $BugId = '17757';
+        $_ = "code:   'x' { '...' }\n"; study;
+        my @x; push @x, $& while m/'[^\']*'/gx;
+        local $" = ":";
+        iseq "@x", "'x':'...'", "Parse::RecDescent triggered infinite loop";
+    }
 
-    print "not " unless "\x{101}a" =~ /[\x{100}]/i;
-    print "ok 770\n";
 
-    print "not " unless "\x{100}a" =~ /[\x{100}]/i;
-    print "ok 771\n";
+    {
+        my $re = qq /^([^X]*)X/;
+        utf8::upgrade ($re);
+        ok "\x{100}X" =~ /$re/, "S_cl_and ANYOF_UNICODE & ANYOF_INVERTED";
+    }
 
-    print "not " unless "\x{101}a" =~ /[\x{101}]/i;
-    print "ok 772\n";
 
-    print "not " unless "\x{100}a" =~ /[\x{101}]/i;
-    print "ok 773\n";
+    {
+        local $BugId = '22354';
+        sub func ($) {
+            ok "a\nb" !~ /^b/,  "Propagated modifier; $_[0]";
+            ok "a\nb" =~ /^b/m, "Propagated modifier; $_[0] - with /m";
+        }
+        func "standalone";
+        $_ = "x"; s/x/func "in subst"/e;
+        $_ = "x"; s/x/func "in multiline subst"/em;
+
+        #
+        # Next two give 'panic: malloc'.
+        # Outcommented, using two TODOs.
+        #
+        local $TODO    = 'panic: malloc';
+        local $Message = 'Postponed regexp and propaged modifier';
+      # ok 0 for 1 .. 2;
+      SKIP: {
+            skip "panic: malloc", 2;
+            $_ = "x"; /x(?{func "in regexp"})/;
+            $_ = "x"; /x(?{func "in multiline regexp"})/m;
+        }
+    }
 
-}
 
-{
-    use charnames ':full';
+    {
+        local $BugId = '19049';
+        $_    = "abcdef\n";
+        my @x = m/./g;
+        iseq "abcde", $`, 'Global match sets $`';
+    }
 
-    print "# LATIN LETTER A WITH GRAVE\n";
-    my $lower = "\N{LATIN SMALL LETTER A WITH GRAVE}";
-    my $UPPER = "\N{LATIN CAPITAL LETTER A WITH GRAVE}";
 
-    print $lower =~ m/$UPPER/i   ? "ok 774\n" : "not ok 774\n";
-    print $UPPER =~ m/$lower/i   ? "ok 775\n" : "not ok 775\n";
-    print $lower =~ m/[$UPPER]/i ? "ok 776\n" : "not ok 776\n";
-    print $UPPER =~ m/[$lower]/i ? "ok 777\n" : "not ok 777\n";
+    {
+        ok "123\x{100}" =~ /^.*1.*23\x{100}$/,
+           'UTF-8 + multiple floating substr';
+    }
 
-    print "# GREEK LETTER ALPHA WITH VRACHY\n";
 
-    $lower = "\N{GREEK CAPITAL LETTER ALPHA WITH VRACHY}";
-    $UPPER = "\N{GREEK SMALL LETTER ALPHA WITH VRACHY}";
+    {
+        local $Message = '<20030808193656.5109.1@llama.ni-s.u-net.com>';
 
-    print $lower =~ m/$UPPER/i   ? "ok 778\n" : "not ok 778\n";
-    print $UPPER =~ m/$lower/i   ? "ok 779\n" : "not ok 779\n";
-    print $lower =~ m/[$UPPER]/i ? "ok 780\n" : "not ok 780\n";
-    print $UPPER =~ m/[$lower]/i ? "ok 781\n" : "not ok 781\n";
+        # LATIN SMALL/CAPITAL LETTER A WITH MACRON
+        ok "  \x{101}" =~ qr/\x{100}/i;
 
-    print "# LATIN LETTER Y WITH DIAERESIS\n";
+        # LATIN SMALL/CAPITAL LETTER A WITH RING BELOW
+        ok "  \x{1E01}" =~ qr/\x{1E00}/i;
 
-    $lower = "\N{LATIN CAPITAL LETTER Y WITH DIAERESIS}";
-    $UPPER = "\N{LATIN SMALL LETTER Y WITH DIAERESIS}";
-    print $lower =~ m/$UPPER/i   ? "ok 782\n" : "not ok 782\n";
-    print $UPPER =~ m/$lower/i   ? "ok 783\n" : "not ok 783\n";
-    print $lower =~ m/[$UPPER]/i ? "ok 784\n" : "not ok 784\n";
-    print $UPPER =~ m/[$lower]/i ? "ok 785\n" : "not ok 785\n";
-}
+        # DESERET SMALL/CAPITAL LETTER LONG I
+        ok "  \x{10428}" =~ qr/\x{10400}/i;
 
-{
-    use warnings;
-    use charnames ':full';
-    
-    print "# GREEK CAPITAL LETTER SIGMA vs COMBINING GREEK PERISPOMENI\n";
+        # LATIN SMALL/CAPITAL LETTER A WITH RING BELOW + 'X'
+        ok "  \x{1E01}x" =~ qr/\x{1E00}X/i;
+    }
 
-    my $SIGMA = "\N{GREEK CAPITAL LETTER SIGMA}";
-    my $char  = "\N{COMBINING GREEK PERISPOMENI}";
 
-    # Before #13843 this was failing by matching falsely.
-    print "_:$char:_" =~ m/_:$SIGMA:_/i ? "not ok 786\n" : "ok 786\n";
-}
+    {
+        # [perl #23769] Unicode regex broken on simple example
+        # regrepeat() didn't handle UTF-8 EXACT case right.
+        local $BugId   = '23769';
+        my $Mess       = 'regrepeat() handles UTF-8 EXACT case right';
+        local $Message = $Mess;
 
-{
-    print "# \\X\n";
-
-    use charnames ':full';
-
-    print "a!"              =~ /^(\X)!/ && $1 eq "a" ?
-	"ok 787\n" : "not ok 787 # $1\n";
-    print "\xDF!"           =~ /^(\X)!/ && $1 eq "\xDF" ?
-	"ok 788\n" : "not ok 788 # $1\n";
-    print "\x{100}!"        =~ /^(\X)!/ && $1 eq "\x{100}" ?
-	"ok 789\n" : "not ok 789 # $1\n";
-    print "\x{100}\x{300}!" =~ /^(\X)!/ && $1 eq "\x{100}\x{300}" ?
-	"ok 790\n" : "not ok 790 # $1\n";
-    print "\N{LATIN CAPITAL LETTER E}!" =~ /^(\X)!/ &&
-	$1 eq "\N{LATIN CAPITAL LETTER E}" ?
-	"ok 791\n" : "not ok 791 # $1\n";
-    print "\N{LATIN CAPITAL LETTER E}\N{COMBINING GRAVE ACCENT}!" =~
-	/^(\X)!/ &&
-	$1 eq "\N{LATIN CAPITAL LETTER E}\N{COMBINING GRAVE ACCENT}" ?
-	"ok 792\n" : "not ok 792 # $1\n";
-}
+        my $s = "\x{a0}\x{a0}\x{a0}\x{100}"; chop $s;
 
-{
-    print "#\\C and \\X\n";
+        ok $s =~ /\x{a0}/;
+        ok $s =~ /\x{a0}+/;
+        ok $s =~ /\x{a0}\x{a0}/;
 
-    print "!abc!" =~ /a\Cc/ ? "ok 793\n" : "not ok 793\n";
-    print "!abc!" =~ /a\Xc/ ? "ok 794\n" : "not ok 794\n";
-}
+        $Message = "$Mess (easy variant)";
+        ok "aaa\x{100}" =~ /(a+)/;
+        iseq $1, "aaa";
 
-{
-    print "# FINAL SIGMA\n";
+        $Message = "$Mess (easy invariant)";
+        ok "aaa\x{100}     " =~ /(a+?)/;
+        iseq $1, "a";
 
-    my $SIGMA = "\x{03A3}"; # CAPITAL
-    my $Sigma = "\x{03C2}"; # SMALL FINAL
-    my $sigma = "\x{03C3}"; # SMALL
+        $Message = "$Mess (regrepeat variant)";
+        ok "\xa0\xa0\xa0\x{100}    " =~ /(\xa0+?)/;
+        iseq $1, "\xa0";
 
-    print $SIGMA =~ /$SIGMA/i ? "ok 795\n" : "not ok 795\n";
-    print $SIGMA =~ /$Sigma/i ? "ok 796\n" : "not ok 796\n";
-    print $SIGMA =~ /$sigma/i ? "ok 797\n" : "not ok 797\n";
+        $Message = "$Mess (regrepeat invariant)";
+        ok "\xa0\xa0\xa0\x{100}" =~ /(\xa0+)/;
+        iseq $1, "\xa0\xa0\xa0";
 
-    print $Sigma =~ /$SIGMA/i ? "ok 798\n" : "not ok 798\n";
-    print $Sigma =~ /$Sigma/i ? "ok 799\n" : "not ok 799\n";
-    print $Sigma =~ /$sigma/i ? "ok 800\n" : "not ok 800\n";
+        $Message = "$Mess (hard variant)";
+        ok "\xa0\xa1\xa0\xa1\xa0\xa1\x{100}" =~ /((?:\xa0\xa1)+?)/;
+        iseq $1, "\xa0\xa1";
 
-    print $sigma =~ /$SIGMA/i ? "ok 801\n" : "not ok 801\n";
-    print $sigma =~ /$Sigma/i ? "ok 802\n" : "not ok 802\n";
-    print $sigma =~ /$sigma/i ? "ok 803\n" : "not ok 803\n";
-    
-    print $SIGMA =~ /[$SIGMA]/i ? "ok 804\n" : "not ok 804\n";
-    print $SIGMA =~ /[$Sigma]/i ? "ok 805\n" : "not ok 805\n";
-    print $SIGMA =~ /[$sigma]/i ? "ok 806\n" : "not ok 806\n";
+        $Message = "$Mess (hard invariant)";
+        ok "ababab\x{100}  " =~ /((?:ab)+)/;
+        iseq $1, 'ababab';
 
-    print $Sigma =~ /[$SIGMA]/i ? "ok 807\n" : "not ok 807\n";
-    print $Sigma =~ /[$Sigma]/i ? "ok 808\n" : "not ok 808\n";
-    print $Sigma =~ /[$sigma]/i ? "ok 809\n" : "not ok 809\n";
+        ok "\xa0\xa1\xa0\xa1\xa0\xa1\x{100}" =~ /((?:\xa0\xa1)+)/;
+        iseq $1, "\xa0\xa1\xa0\xa1\xa0\xa1";
 
-    print $sigma =~ /[$SIGMA]/i ? "ok 810\n" : "not ok 810\n";
-    print $sigma =~ /[$Sigma]/i ? "ok 811\n" : "not ok 811\n";
-    print $sigma =~ /[$sigma]/i ? "ok 812\n" : "not ok 812\n";
-}
+        ok "ababab\x{100}  " =~ /((?:ab)+?)/;
+        iseq $1, "ab";
 
-{
-    print "# parlez-vous?\n";
-
-    use charnames ':full';
-
-    print "fran\N{LATIN SMALL LETTER C}ais" =~
-	  /fran.ais/ &&
-	$& eq "francais" ?
-	"ok 813\n" : "not ok 813\n";
-
-    print "fran\N{LATIN SMALL LETTER C WITH CEDILLA}ais" =~
-	  /fran.ais/ &&
-	$& eq "fran\N{LATIN SMALL LETTER C WITH CEDILLA}ais" ?
-	"ok 814\n" : "not ok 814\n";
-
-    print "fran\N{LATIN SMALL LETTER C}ais" =~
-	   /fran\Cais/ &&
-        $& eq "francais" ?
-	"ok 815\n" : "not ok 815\n";
-
-    print "franc\N{COMBINING CEDILLA}ais" =~
-	  /franc\C\Cais/ ? # COMBINING CEDILLA is two bytes when encoded
-	"ok 816\n" : "not ok 816\n";
-
-    print "fran\N{LATIN SMALL LETTER C}ais" =~
-	  /fran\Xais/ &&
-	$& eq "francais" ?
-	"ok 817\n" : "not ok 817\n";
-
-    print "fran\N{LATIN SMALL LETTER C WITH CEDILLA}ais" =~
-	  /fran\Xais/  &&
-        $& eq "fran\N{LATIN SMALL LETTER C WITH CEDILLA}ais" ?
-	"ok 818\n" : "not ok 818\n";
-
-    print "franc\N{COMBINING CEDILLA}ais" =~
-	  /fran\Xais/ &&
-         $& eq "franc\N{COMBINING CEDILLA}ais" ?
-	 "ok 819\n" : "not ok 819\n";
-
-    print "fran\N{LATIN SMALL LETTER C WITH CEDILLA}ais" =~
-	  /fran\N{LATIN SMALL LETTER C WITH CEDILLA}ais/  &&
-        $& eq "fran\N{LATIN SMALL LETTER C WITH CEDILLA}ais" ?
-	"ok 820\n" : "not ok 820\n";
-
-    print "franc\N{COMBINING CEDILLA}ais" =~
-	  /franc\N{COMBINING CEDILLA}ais/  &&
-        $& eq "franc\N{COMBINING CEDILLA}ais" ?
-	"ok 821\n" : "not ok 821\n";
-
-    print "fran\N{LATIN SMALL LETTER C}ais" =~
-	  /fran(?:c\N{COMBINING CEDILLA}?|\N{LATIN SMALL LETTER C WITH CEDILLA})ais/ &&
-	$& eq "francais" ?
-	"ok 822\n" : "not ok 822\n";
-
-    print "fran\N{LATIN SMALL LETTER C}ais" =~
-	  /fran(?:c\N{COMBINING CEDILLA}?|\N{LATIN SMALL LETTER C WITH CEDILLA})ais/ &&
-	$& eq "francais" ?
-	"ok 823\n" : "not ok 823\n";
-
-    print "fran\N{LATIN SMALL LETTER C WITH CEDILLA}ais" =~
-	  /fran(?:c\N{COMBINING CEDILLA}?|\N{LATIN SMALL LETTER C WITH CEDILLA})ais/ &&
-	$& eq "fran\N{LATIN SMALL LETTER C WITH CEDILLA}ais" ?
-	"ok 824\n" : "not ok 824\n";
-
-    print "franc\N{COMBINING CEDILLA}ais" =~
-	  /fran(?:c\N{COMBINING CEDILLA}?|\N{LATIN SMALL LETTER C WITH CEDILLA})ais/ &&
-	$& eq "franc\N{COMBINING CEDILLA}ais" ?
-	"ok 825\n" : "not ok 825\n";
-}
+        $Message = "Don't match first byte of UTF-8 representation";
+        ok "\xc4\xc4\xc4" !~ /(\x{100}+)/;
+        ok "\xc4\xc4\xc4" !~ /(\x{100}+?)/;
+        ok "\xc4\xc4\xc4" !~ /(\x{100}++)/;
+    }
 
-{
-    print "# Does lingering (and useless) UTF8 flag mess up /i matching?\n";
 
     {
-	my $regex  = "ABcde";
-	my $string = "abcDE\x{100}";
-	chop($string);
-	if ($string =~ m/$regex/i) {
-	    print "ok 826\n";
-	} else {
-	    print "not ok 826\n";
-	}
+        for (120 .. 130) {
+            my $head = 'x' x $_;
+            local $Message = q [Don't misparse \x{...} in regexp ] .
+                             q [near 127 char EXACT limit];
+            for my $tail ('\x{0061}', '\x{1234}', '\x61') {
+                eval_ok qq ["$head$tail" =~ /$head$tail/];
+            }
+            local $Message = q [Don't misparse \N{...} in regexp ] .
+                             q [near 127 char EXACT limit];
+            for my $tail ('\N{SNOWFLAKE}') {
+                eval_ok qq [use charnames ':full';
+                           "$head$tail" =~ /$head$tail/];
+            }
+        }
     }
 
-    {
-	my $regex  = "ABcde\x{100}";
-	my $string = "abcDE";
-	chop($regex);
-	if ($string =~ m/$regex/i) {
-	    print "ok 827\n";
-	} else {
-	    print "not ok 827\n";
-	}
-    }
 
     {
-	my $regex  = "ABcde\x{100}";
-	my $string = "abcDE\x{100}";
-	chop($regex);
-	chop($string);
-	if ($string =~ m/$regex/i) {
-	    print "ok 828\n";
-	} else {
-	    print "not ok 828\n";
-	}
+        # perl panic: pp_match start/end pointers
+        local $BugId = '25269';
+        iseq "a-bc", eval {my ($x, $y) = "bca" =~ /^(?=.*(a)).*(bc)/; "$x-$y"},
+             'Captures can move backwards in string';
     }
-}
 
-{
-    print "# more SIGMAs\n";
 
-    my $SIGMA = "\x{03A3}"; # CAPITAL
-    my $Sigma = "\x{03C2}"; # SMALL FINAL
-    my $sigma = "\x{03C3}"; # SMALL
+    {
+        local $BugId   = '27940'; # \cA not recognized in character classes
+        ok "a\cAb" =~ /\cA/, '\cA in pattern';
+        ok "a\cAb" =~ /[\cA]/, '\cA in character class';
+        ok "a\cAb" =~ /[\cA-\cB]/, '\cA in character class range';
+        ok "abc" =~ /[^\cA-\cB]/, '\cA in negated character class range';
+        ok "a\cBb" =~ /[\cA-\cC]/, '\cB in character class range';
+        ok "a\cCbc" =~ /[^\cA-\cB]/, '\cC in negated character class range';
+        ok "a\cAb" =~ /(??{"\cA"})/, '\cA in ??{} pattern';
+        ok "ab" !~ /a\cIb/x, '\cI in pattern';
+    }
 
-    my $S3 = "$SIGMA$Sigma$sigma";
 
-    print ":$S3:" =~ /:(($SIGMA)+):/i   && $1 eq $S3 && $2 eq $sigma ?
-	"ok 829\n" : "not ok 829\n";
-    print ":$S3:" =~ /:(($Sigma)+):/i   && $1 eq $S3 && $2 eq $sigma ?
-	"ok 830\n" : "not ok 830\n";
-    print ":$S3:" =~ /:(($sigma)+):/i   && $1 eq $S3 && $2 eq $sigma ?
-	"ok 831\n" : "not ok 831\n";
+    {
+        # perl #28532: optional zero-width match at end of string is ignored
+        local $BugId = '28532';
+        ok "abc" =~ /^abc(\z)?/ && defined($1),
+           'Optional zero-width match at end of string';
+        ok "abc" =~ /^abc(\z)??/ && !defined($1),
+           'Optional zero-width match at end of string';
+    }
 
-    print ":$S3:" =~ /:(([$SIGMA])+):/i && $1 eq $S3 && $2 eq $sigma ?
-	"ok 832\n" : "not ok 832\n";
-    print ":$S3:" =~ /:(([$Sigma])+):/i && $1 eq $S3 && $2 eq $sigma ?
-	"ok 833\n" : "not ok 833\n";
-    print ":$S3:" =~ /:(([$sigma])+):/i && $1 eq $S3 && $2 eq $sigma ?
-	"ok 834\n" : "not ok 834\n";
-}
 
-{
-    print "# LATIN SMALL LETTER SHARP S\n";
 
-    use charnames ':full';
+    {   # TRIE related
+        our @got = ();
+        "words" =~ /(word|word|word)(?{push @got, $1})s$/;
+        iseq @got, 1, "TRIE optimation";
 
-    print "\N{LATIN SMALL LETTER SHARP S}" =~
-	/\N{LATIN SMALL LETTER SHARP S}/    ? "ok 835\n" : "not ok 835\n";
+        @got = ();
+        "words" =~ /(word|word|word)(?{push @got,$1})s$/i;
+        iseq @got, 1,"TRIEF optimisation";
 
-    print "\N{LATIN SMALL LETTER SHARP S}" =~
-	/\N{LATIN SMALL LETTER SHARP S}/i   ? "ok 836\n" : "not ok 836\n";
+        my @nums = map {int rand 1000} 1 .. 100;
+        my $re = "(" . (join "|", @nums) . ")";
+        $re = qr/\b$re\b/;
 
-    print "\N{LATIN SMALL LETTER SHARP S}" =~
-	/[\N{LATIN SMALL LETTER SHARP S}]/  ? "ok 837\n" : "not ok 837\n";
+        foreach (@nums) {
+            ok $_ =~ /$re/, "Trie nums";
+        }
 
-    print "\N{LATIN SMALL LETTER SHARP S}" =~
-	/[\N{LATIN SMALL LETTER SHARP S}]/i ? "ok 838\n" : "not ok 838\n";
+        $_ = join " ", @nums;
+        @got = ();
+        push @got, $1 while /$re/g;
 
-    print "ss" =~
-	/\N{LATIN SMALL LETTER SHARP S}/i   ? "ok 839\n" : "not ok 839\n";
+        my %count;
+        $count {$_} ++ for @got;
+        my $ok = 1;
+        for (@nums) {
+            $ok = 0 if --$count {$_} < 0;
+        }
+        ok $ok, "Trie min count matches";
+    }
 
-    print "SS" =~
-	/\N{LATIN SMALL LETTER SHARP S}/i   ? "ok 840\n" : "not ok 840\n";
 
-    print "ss" =~
-	/[\N{LATIN SMALL LETTER SHARP S}]/i ? "ok 841\n" : "not ok 841\n";
+    {
+        # TRIE related
+        # LATIN SMALL/CAPITAL LETTER A WITH MACRON
+        ok "foba  \x{101}foo" =~ qr/(foo|\x{100}foo|bar)/i &&
+           $1 eq "\x{101}foo",
+           "TRIEF + LATIN SMALL/CAPITAL LETTER A WITH MACRON";
+
+        # LATIN SMALL/CAPITAL LETTER A WITH RING BELOW
+        ok "foba  \x{1E01}foo" =~ qr/(foo|\x{1E00}foo|bar)/i &&
+           $1 eq "\x{1E01}foo",
+           "TRIEF + LATIN SMALL/CAPITAL LETTER A WITH RING BELOW";
+
+        # DESERET SMALL/CAPITAL LETTER LONG I
+        ok "foba  \x{10428}foo" =~ qr/(foo|\x{10400}foo|bar)/i &&
+           $1 eq "\x{10428}foo",
+           "TRIEF + DESERET SMALL/CAPITAL LETTER LONG I";
+
+        # LATIN SMALL/CAPITAL LETTER A WITH RING BELOW + 'X'
+        ok "foba  \x{1E01}xfoo" =~ qr/(foo|\x{1E00}Xfoo|bar)/i &&
+           $1 eq "\x{1E01}xfoo",
+           "TRIEF + LATIN SMALL/CAPITAL LETTER A WITH RING BELOW + 'X'";
+
+        use charnames ':full';
+
+        my $s = "\N{LATIN SMALL LETTER SHARP S}";
+        ok "foba  ba$s" =~ qr/(foo|Ba$s|bar)/i &&  $1 eq "ba$s",
+           "TRIEF + LATIN SMALL LETTER SHARP S =~ ss";
+        ok "foba  ba$s" =~ qr/(Ba$s|foo|bar)/i &&  $1 eq "ba$s",
+           "TRIEF + LATIN SMALL LETTER SHARP S =~ ss";
+        ok "foba  ba$s" =~ qr/(foo|bar|Ba$s)/i &&  $1 eq "ba$s",
+           "TRIEF + LATIN SMALL LETTER SHARP S =~ ss";
+
+        ok "foba  ba$s" =~ qr/(foo|Bass|bar)/i &&  $1 eq "ba$s",
+           "TRIEF + LATIN SMALL LETTER SHARP S =~ ss";
+
+        ok "foba  ba$s" =~ qr/(foo|BaSS|bar)/i &&  $1 eq "ba$s",
+           "TRIEF + LATIN SMALL LETTER SHARP S =~ SS";
+
+        ok "foba  ba${s}pxySS$s$s" =~ qr/(b(?:a${s}t|a${s}f|a${s}p)[xy]+$s*)/i
+            &&  $1 eq "ba${s}pxySS$s$s",
+           "COMMON PREFIX TRIEF + LATIN SMALL LETTER SHARP S";
+    }
 
-    print "SS" =~
-	/[\N{LATIN SMALL LETTER SHARP S}]/i ? "ok 842\n" : "not ok 842\n";
 
-    print "\N{LATIN SMALL LETTER SHARP S}" =~ /ss/i ?
-	"ok 843\n" : "not ok 843\n";
+  SKIP:
+    {
+        print "# Set PERL_SKIP_PSYCHO_TEST to skip this test\n";
+        my @normal = qw [the are some normal words];
 
-    print "\N{LATIN SMALL LETTER SHARP S}" =~ /SS/i ?
-	"ok 844\n" : "not ok 844\n";
-}
+        skip "Skipped Psycho", 2 * @normal if $ENV {PERL_SKIP_PSYCHO_TEST};
 
-{
-    print "# more whitespace: U+0085, U+2028, U+2029\n";
+        local $" = "|";
 
-    # U+0085 needs to be forced to be Unicode, the \x{100} does that.
-    print "<\x{100}\x{0085}>" =~ /<\x{100}\s>/ ? "ok 845\n" : "not ok 845\n";
-    print "<\x{2028}>" =~ /<\s>/ ? "ok 846\n" : "not ok 846\n";
-    print "<\x{2029}>" =~ /<\s>/ ? "ok 847\n" : "not ok 847\n";
-}
+        my @psycho = (@normal, map chr $_, 255 .. 20000);
+        my $psycho1 = "@psycho";
+        for (my $i = @psycho; -- $i;) {
+            my $j = int rand (1 + $i);
+            @psycho [$i, $j] = @psycho [$j, $i];
+        }
+        my $psycho2 = "@psycho";
 
-{
-    print "# . with /s should work on characters, as opposed to bytes\n";
+        foreach my $word (@normal) {
+            ok $word =~ /($psycho1)/ && $1 eq $word, 'Psycho';
+            ok $word =~ /($psycho2)/ && $1 eq $word, 'Psycho';
+        }
+    }
 
-    my $s = "\x{e4}\x{100}";
 
-    # This is not expected to match: the point is that
-    # neither should we get "Malformed UTF-8" warnings.
-    print $s =~ /\G(.+?)\n/gcs ?
-	"not ok 848\n" : "ok 848\n";
+    {
+        local $BugId = '36207';
+        my $utf8 = "\xe9\x{100}"; chop $utf8;
+        my $latin1 = "\xe9";
+
+        ok $utf8 =~ /\xe9/i, "utf8/latin";
+        ok $utf8 =~ /$latin1/i, "utf8/latin runtime";
+        ok $utf8 =~ /(abc|\xe9)/i, "utf8/latin trie";
+        ok $utf8 =~ /(abc|$latin1)/i, "utf8/latin trie runtime";
+
+        ok "\xe9" =~ /$utf8/i, "latin/utf8";
+        ok "\xe9" =~ /(abc|$utf8)/i, "latin/utf8 trie";
+        ok $latin1 =~ /$utf8/i, "latin/utf8 runtime";
+        ok $latin1 =~ /(abc|$utf8)/i, "latin/utf8 trie runtime";
+    }
 
-    my @c;
 
-    while ($s =~ /\G(.)/gs) {
-	push @c, $1;
+    {
+        local $BugId = '37038';
+        my $s = "abcd";
+        $s =~ /(..)(..)/g;
+        $s = $1;
+        $s = $2;
+        iseq $2, 'cd',
+             "Assigning to original string does not corrupt match vars";
     }
 
-    print join("", @c) eq $s ? "ok 849\n" : "not ok 849\n";
 
-    my $t1 = "Q003\n\n\x{e4}\x{f6}\n\nQ004\n\n\x{e7}"; # test only chars < 256
-    my $r1 = "";
-    while ($t1 =~ / \G ( .+? ) \n\s+ ( .+? ) ( $ | \n\s+ ) /xgcs) {
-	$r1 .= $1 . $2;
+    {
+        {
+            package wooosh;
+            sub gloople {"!"}
+        }
+        my $aeek = bless {} => 'wooosh';
+        eval_ok sub {$aeek -> gloople () =~ /(.)/g},
+               "//g match against return value of sub";
+
+        sub gloople {"!"}
+        eval_ok sub {gloople () =~ /(.)/g},
+               "26410 didn't affect sub calls for some reason";
     }
 
-    my $t2 = $t1 . "\x{100}"; # repeat with a larger char
-    my $r2 = "";
-    while ($t2 =~ / \G ( .+? ) \n\s+ ( .+? ) ( $ | \n\s+ ) /xgcs) {
-	$r2 .= $1 . $2;
-    }
-    $r2 =~ s/\x{100}//;
-    print $r1 eq $r2 ? "ok 850\n" : "not ok 850\n";
-}
 
-{
-    print "# Unicode lookbehind\n";
+    {
+        local $TODO = "See changes 26925-26928, which reverted change 26410";
+        {
+            package lv;
+            our $var = "abc";
+            sub variable : lvalue {$var}
+        }
+        my $o = bless [] => 'lv';
+        my $f = "";
+        my $r = eval {
+            for (1 .. 2) {
+                $f .= $1 if $o -> variable =~ /(.)/g;
+            }
+            1;
+        };
+        if ($r) {
+            iseq $f, "ab", "pos() retained between calls";
+        }
+        else {
+            local $TODO;
+            ok 0, "Code failed: $@";
+        }
+
+        our $var = "abc";
+        sub variable : lvalue {$var}
+        my $g = "";
+        my $s = eval {
+            for (1 .. 2) {
+                $g .= $1 if variable =~ /(.)/g;
+            }
+            1;
+        };
+        if ($s) {
+            iseq $g, "ab", "pos() retained between calls";
+        }
+        else {
+            local $TODO;
+            ok 0, "Code failed: $@";
+        }
+    }
 
-    print "A\x{100}B"        =~ /(?<=A.)B/  ? "ok 851\n" : "not ok 851\n";
-    print "A\x{200}\x{300}B" =~ /(?<=A..)B/ ? "ok 852\n" : "not ok 852\n";
-    print "\x{400}AB"        =~ /(?<=\x{400}.)B/ ? "ok 853\n" : "not ok 853\n";
-    print "\x{500\x{600}}B"  =~ /(?<=\x{500}.)B/ ? "ok 854\n" : "not ok 854\n";
-}
 
-{
-    print "# UTF-8 hash keys and /\$/\n";
-    # http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/2002-01/msg01327.html
-
-    my $u = "a\x{100}";
-    my $v = substr($u,0,1);
-    my $w = substr($u,1,1);
-    my %u = ( $u => $u, $v => $v, $w => $w );
-    my $i = 855; 
-    for (keys %u) {
-	my $m1 = /^\w*$/ ? 1 : 0;
-	my $m2 = $u{$_}=~/^\w*$/ ? 1 : 0;
-	print $m1 == $m2 ? "ok $i\n" : "not ok $i # $m1 $m2\n";
-	$i++;
+  SKIP:
+    {
+        local $BugId = '37836';
+        skip "In EBCDIC" if $IS_EBCDIC;
+        no warnings 'utf8';
+        $_ = pack 'U0C2', 0xa2, 0xf8;  # Ill-formed UTF-8
+        my $ret = 0;
+        eval_ok sub {!($ret = s/[\0]+//g)},
+                "Ill-formed UTF-8 doesn't match NUL in class";
     }
-}
 
-{
-    print "# [ID 20020124.005]\n";
-    # Fixed by #14795.
-    my $i = 858;
-    for my $char ("a", "\x{df}", "\x{100}"){
-	$x = "$char b $char";
-	$x =~ s{($char)}{
-	    "c" =~ /c/;
-	    "x";
-	}ge;
-	print substr($x,0,1) eq substr($x,-1,1) ?
-	    "ok $i\n" : "not ok $i # debug: $x\n";
- 	$i++;
-   }
-}
-
-{
-    print "# SEGV in s/// and UTF-8\n";
-    $s = "s#\x{100}" x 4;
-    $s =~ s/[^\w]/ /g;
-    print $s eq "s \x{100}" x 4 ? "ok 861\n" : "not ok 861\n";
-}
 
-{
-    print "# UTF-8 bug (maybe alreayd known?)\n";
-    my $u;
+    {
+        # chr(65535) should be allowed in regexes
+        local $BugId = '38293';
+        no warnings 'utf8'; # To allow non-characters
+        my ($c, $r, $s);
+
+        $c = chr 0xffff;
+        $c =~ s/$c//g;
+        ok $c eq "", "U+FFFF, parsed as atom";
+
+        $c = chr 0xffff;
+        $r = "\\$c";
+        $c =~ s/$r//g;
+        ok $c eq "", "U+FFFF backslashed, parsed as atom";
+
+        $c = chr 0xffff;
+        $c =~ s/[$c]//g;
+        ok $c eq "", "U+FFFF, parsed in class";
+
+        $c = chr 0xffff;
+        $r = "[\\$c]";
+        $c =~ s/$r//g;
+        ok $c eq "", "U+FFFF backslashed, parsed in class";
+
+        $s = "A\x{ffff}B";
+        $s =~ s/\x{ffff}//i;
+        ok $s eq "AB", "U+FFFF, EXACTF";
+
+        $s = "\x{ffff}A";
+        $s =~ s/\bA//;
+        ok $s eq "\x{ffff}", "U+FFFF, BOUND";
+
+        $s = "\x{ffff}!";
+        $s =~ s/\B!//;
+        ok $s eq "\x{ffff}", "U+FFFF, NBOUND";
+    }
 
-    $u = "foo";
-    $u =~ s/./\x{100}/g;
-    print $u eq "\x{100}\x{100}\x{100}" ? "ok 862\n" : "not ok 862\n";
 
-    $u = "foobar";
-    $u =~ s/[ao]/\x{100}/g;
-    print $u eq "f\x{100}\x{100}b\x{100}r" ? "ok 863\n" : "not ok 863\n";
+    {
+        local $BugId = '39583';
+        
+        # The printing characters
+        my @chars = ("A" .. "Z");
+        my $delim = ",";
+        my $size = 32771 - 4;
+        my $str = '';
+
+        # Create some random junk. Inefficient, but it works.
+        for (my $i = 0; $i < $size; $ i++) {
+            $str .= $chars [rand @chars];
+        }
+
+        $str .= ($delim x 4);
+        my $res;
+        my $matched;
+        ok $str =~ s/^(.*?)${delim}{4}//s, "Pattern matches";
+        iseq $str, "", "Empty string";
+        ok defined $1 && length ($1) == $size, '$1 is correct size';
+    }
 
-    $u =~ s/\x{100}/e/g;
-    print $u eq "feeber" ? "ok 864\n" : "not ok 864\n";
-}
 
-{
-    print "# UTF-8 bug with s///\n";
-    # check utf8/non-utf8 mixtures
-    # try to force all float/anchored check combinations
-    my $c = "\x{100}";
-    my $test = 865;
-    my $subst;
-    for my $re (
-	"xx.*$c", "x.*$c$c", "$c.*xx", "$c$c.*x", "xx.*(?=$c)", "(?=$c).*xx",
-    ) {
-	print "xxx" =~ /$re/ ? "not ok $test\n" : "ok $test\n";
-	++$test;
-	print +($subst = "xxx") =~ s/$re// ? "not ok $test\n" : "ok $test\n";
-	++$test;
-    }
-    for my $re ("xx.*$c*", "$c*.*xx") {
-	print "xxx" =~ /$re/ ? "ok $test\n" : "not ok $test\n";
-	++$test;
-	($subst = "xxx") =~ s/$re//;
-	print $subst eq '' ? "ok $test\n" : "not ok $test\t# $subst\n";
-	++$test;
-    }
-    for my $re ("xxy*", "y*xx") {
-	print "xx$c" =~ /$re/ ? "ok $test\n" : "not ok $test\n";
-	++$test;
-	($subst = "xx$c") =~ s/$re//;
-	print $subst eq $c ? "ok $test\n" : "not ok $test\n";
-	++$test;
-	print "xy$c" =~ /$re/ ? "not ok $test\n" : "ok $test\n";
-	++$test;
-	print +($subst = "xy$c") =~ /$re/ ? "not ok $test\n" : "ok $test\n";
-	++$test;
-    }
-    for my $re ("xy$c*z", "x$c*yz") {
-	print "xyz" =~ /$re/ ? "ok $test\n" : "not ok $test\n";
-	++$test;
-	($subst = "xyz") =~ s/$re//;
-	print $subst eq '' ? "ok $test\n" : "not ok $test\n";
-	++$test;
+    {
+        local $BugId = '27940';
+        ok "\0-A"  =~ /\c@-A/, '@- should not be interpolated in a pattern';
+        ok "\0\0A" =~ /\c@+A/, '@+ should not be interpolated in a pattern';
+        ok "X\@-A"  =~ /X@-A/, '@- should not be interpolated in a pattern';
+        ok "X\@\@A" =~ /X@+A/, '@+ should not be interpolated in a pattern';
+
+        ok "X\0A" =~ /X\c@?A/,  '\c@?';
+        ok "X\0A" =~ /X\c@*A/,  '\c@*';
+        ok "X\0A" =~ /X\c@(A)/, '\c@(';
+        ok "X\0A" =~ /X(\c@)A/, '\c@)';
+        ok "X\0A" =~ /X\c@|ZA/, '\c@|';
+
+        ok "X\@A" =~ /X@?A/,  '@?';
+        ok "X\@A" =~ /X@*A/,  '@*';
+        ok "X\@A" =~ /X@(A)/, '@(';
+        ok "X\@A" =~ /X(@)A/, '@)';
+        ok "X\@A" =~ /X@|ZA/, '@|';
+
+        local $" = ','; # non-whitespace and non-RE-specific
+        ok 'abc' =~ /(.)(.)(.)/, 'The last successful match is bogus';
+        ok "A@+B"  =~ /A@{+}B/,  'Interpolation of @+ in /@{+}/';
+        ok "A@-B"  =~ /A@{-}B/,  'Interpolation of @- in /@{-}/';
+        ok "A@+B"  =~ /A@{+}B/x, 'Interpolation of @+ in /@{+}/x';
+        ok "A@-B"  =~ /A@{-}B/x, 'Interpolation of @- in /@{-}/x';
     }
-}
 
-{
-    print "# qr/.../x\n";
-    my $test = 893;
 
-    my $R = qr/ A B C # D E/x;
-
-    print eval {"ABCDE" =~ $R} ? "ok $test\n" : "not ok $test\n";
-    $test++;
+    {
+        use lib 'lib';
+        use Cname;
+        
+        ok 'fooB'  =~ /\N{foo}[\N{B}\N{b}]/, "Passthrough charname";
+        my $test   = 1233;
+        #
+        # Why doesn't must_warn work here?
+        #
+        my $w;
+        local $SIG {__WARN__} = sub {$w .= "@_"};
+        eval 'q(xxWxx) =~ /[\N{WARN}]/';
+        ok $w && $w =~ /^Ignoring excess chars from/,
+                 "Ignoring excess chars warning";
+
+        undef $w;
+        eval q [ok "\0" !~ /[\N{EMPTY-STR}XY]/,
+                   "Zerolength charname in charclass doesn't match \\0"];
+        ok $w && $w =~ /^Ignoring zero length/,
+                 'Ignoring zero length \N{%} in character class warning';
+
+        ok 'AB'  =~ /(\N{EVIL})/ && $1 eq 'A', 'Charname caching $1';
+        ok 'ABC' =~ /(\N{EVIL})/,              'Charname caching $1';
+        ok 'xy'  =~ /x\N{EMPTY-STR}y/,
+                    'Empty string charname produces NOTHING node';
+        ok ''    =~ /\N{EMPTY-STR}/,
+                    'Empty string charname produces NOTHING node';
+            
+    }
 
-    print eval {"ABCDE" =~ m/$R/} ? "ok $test\n" : "not ok $test\n";
-    $test++;
 
-    print eval {"ABCDE" =~ m/($R)/} ? "ok $test\n" : "not ok $test\n";
-    $test++;
-}
+    {
+        use charnames ':full';
+
+        ok 'aabc' !~ /a\N{PLUS SIGN}b/, '/a\N{PLUS SIGN}b/ against aabc';
+        ok 'a+bc' =~ /a\N{PLUS SIGN}b/, '/a\N{PLUS SIGN}b/ against a+bc';
+
+        ok ' A B' =~ /\N{SPACE}\N{U+0041}\N{SPACE}\N{U+0042}/,
+            'Intermixed named and unicode escapes';
+        ok "\N{SPACE}\N{U+0041}\N{SPACE}\N{U+0042}" =~
+           /\N{SPACE}\N{U+0041}\N{SPACE}\N{U+0042}/,
+            'Intermixed named and unicode escapes';
+        ok "\N{SPACE}\N{U+0041}\N{SPACE}\N{U+0042}" =~
+           /[\N{SPACE}\N{U+0041}][\N{SPACE}\N{U+0042}]/,
+            'Intermixed named and unicode escapes';     
+    }
 
-{
-    print "# illegal Unicode properties\n";
-    my $test = 896;
 
-    print eval { "a" =~ /\pq / }      ? "not ok $test\n" : "ok $test\n";
-    $test++;
+    {
+        our $brackets;
+        $brackets = qr{
+            {  (?> [^{}]+ | (??{ $brackets }) )* }
+        }x;
+
+        ok "{b{c}d" !~ m/^((??{ $brackets }))/, "Bracket mismatch";
+
+        SKIP: {
+            our @stack = ();
+            my @expect = qw(
+                stuff1
+                stuff2
+                <stuff1>and<stuff2>
+                right
+                <right>
+                <<right>>
+                <<<right>>>
+                <<stuff1>and<stuff2>><<<<right>>>>
+            );
+
+            local $_ = '<<<stuff1>and<stuff2>><<<<right>>>>>';
+            ok /^(<((?:(?>[^<>]+)|(?1))*)>(?{push @stack, $2 }))$/,
+                "Recursion matches";
+            iseq @stack, @expect, "Right amount of matches"
+                 or skip "Won't test individual results as count isn't equal",
+                          0 + @expect;
+            my $idx = 0;
+            foreach my $expect (@expect) {
+                iseq $stack [$idx], $expect,
+                    "Expecting '$expect' at stack pos #$idx";
+                $idx ++;
+            }
+        }
+    }
 
-    print eval { "a" =~ /\p{qrst} / } ? "not ok $test\n" : "ok $test\n";
-    $test++;
-}
 
-{
-    print "# [ID 20020412.005] wrong pmop flags checked when empty pattern\n";
-    # requires reuse of last successful pattern
-    my $test = 898;
-    $test =~ /\d/;
-    for (0 .. 1) {
-	my $match = ?? + 0;
-	if ($match != $_) {
-	    print "ok $test\n";
-	} else {
-	    printf "not ok %s\t# 'match once' %s on %s iteration\n", $test,
-		    $match ? 'succeeded' : 'failed', $_ ? 'second' : 'first';
-	}
-	++$test;
-    }
-    $test =~ /(\d)/;
-    my $result = join '', $test =~ //g;
-    if ($result eq $test) {
-	print "ok $test\n";
-    } else {
-	printf "not ok %s\t# expected '%s', got '%s'\n", $test, $test, $result;
+    {
+        my $s = '123453456';
+        $s =~ s/(?<digits>\d+)\k<digits>/$+{digits}/;
+        ok $s eq '123456', 'Named capture (angle brackets) s///';
+        $s = '123453456';
+        $s =~ s/(?'digits'\d+)\k'digits'/$+{digits}/;
+        ok $s eq '123456', 'Named capture (single quotes) s///';    
     }
-    ++$test;
-}
 
-print "# user-defined character properties\n";
 
-sub InKana1 {
-    return <<'END';
-3040	309F
-30A0	30FF
-END
-}
+    {
+        my @ary = (
+            pack('U', 0x00F1),            # n-tilde
+            '_'.pack('U', 0x00F1),        # _ + n-tilde
+            'c'.pack('U', 0x0327),        # c + cedilla
+            pack('U*', 0x00F1, 0x0327),   # n-tilde + cedilla
+            'a'.pack('U', 0x00B2),        # a + superscript two
+            pack('U', 0x0391),            # ALPHA
+            pack('U', 0x0391).'2',        # ALPHA + 2
+            pack('U', 0x0391).'_',        # ALPHA + _
+        );
+
+        for my $uni (@ary) {
+            my ($r1, $c1, $r2, $c2) = eval qq {
+                use utf8;
+                scalar ("..foo foo.." =~ /(?'${uni}'foo) \\k'${uni}'/),
+                        \$+{${uni}},
+                scalar ("..bar bar.." =~ /(?<${uni}>bar) \\k<${uni}>/),
+                        \$+{${uni}};
+            };
+            ok $r1,                         "Named capture UTF (?'')";
+            ok defined $c1 && $c1 eq 'foo', "Named capture UTF \%+";
+            ok $r2,                         "Named capture UTF (?<>)";
+            ok defined $c2 && $c2 eq 'bar', "Named capture UTF \%+";
+        }
+    }
 
-sub InKana2 {
-    return <<'END';
-+utf8::InHiragana
-+utf8::InKatakana
-END
-}
 
-sub InKana3 {
-    return <<'END';
-+utf8::InHiragana
-+utf8::InKatakana
--utf8::IsCn
-END
-}
+    {
+        my $s = 'foo bar baz';
+        my (@k, @v, @fetch, $res);
+        my $count = 0;
+        my @names = qw ($+{A} $+{B} $+{C});
+        if ($s =~ /(?<A>foo)\s+(?<B>bar)?\s+(?<C>baz)/) {
+            while (my ($k, $v) = each (%+)) {
+                $count++;
+            }
+            @k = sort keys   (%+);
+            @v = sort values (%+);
+            $res = 1;
+            push @fetch,
+                ["$+{A}", "$1"],
+                ["$+{B}", "$2"],
+                ["$+{C}", "$3"],
+            ;
+        } 
+        foreach (0 .. 2) {
+            if ($fetch [$_]) {
+                iseq $fetch [$_] [0], $fetch [$_] [1], $names [$_];
+            } else {
+                ok 0, $names[$_];
+            }
+        }
+        iseq $res, 1, "'$s' =~ /(?<A>foo)\\s+(?<B>bar)?\\s+(?<C>baz)/";
+        iseq $count, 3, "Got 3 keys in %+ via each";
+        iseq 0 + @k, 3, 'Got 3 keys in %+ via keys';
+        iseq "@k", "A B C", "Got expected keys";
+        iseq "@v", "bar baz foo", "Got expected values";
+        eval '
+            no warnings "uninitialized";
+            print for $+ {this_key_doesnt_exist};
+        ';
+        ok !$@, 'lvalue $+ {...} should not throw an exception';
+    }
 
-sub InNotKana {
-    return <<'END';
-!utf8::InHiragana
--utf8::InKatakana
-+utf8::IsCn
-END
-}
 
-$test = 901;
+    {
+        #
+        # Almost the same as the block above, except that the capture is nested.
+        #
+        local $BugId = '50496';
+        my $s = 'foo bar baz';
+        my (@k, @v, @fetch, $res);
+        my $count = 0;
+        my @names = qw ($+{A} $+{B} $+{C} $+{D});
+        if ($s =~ /(?<D>(?<A>foo)\s+(?<B>bar)?\s+(?<C>baz))/) {
+            while (my ($k,$v) = each(%+)) {
+                $count++;
+            }
+            @k = sort keys   (%+);
+            @v = sort values (%+);
+            $res = 1;
+            push @fetch,
+                ["$+{A}", "$2"],
+                ["$+{B}", "$3"],
+                ["$+{C}", "$4"],
+                ["$+{D}", "$1"],
+            ;
+        }
+        foreach (0 .. 3) {
+            if ($fetch [$_]) {
+                iseq $fetch [$_] [0], $fetch [$_] [1], $names [$_];
+            } else {
+                ok 0, $names [$_];
+            }
+        }
+        iseq $res, 1, "'$s' =~ /(?<D>(?<A>foo)\\s+(?<B>bar)?\\s+(?<C>baz))/";
+        iseq $count, 4, "Got 4 keys in %+ via each";
+        iseq @k, 4, 'Got 4 keys in %+ via keys';
+        iseq "@k", "A B C D", "Got expected keys";
+        iseq "@v", "bar baz foo foo bar baz", "Got expected values";
+        eval '
+            no warnings "uninitialized";
+            print for $+ {this_key_doesnt_exist};
+        ';
+        ok !$@,'lvalue $+ {...} should not throw an exception';
+    }
 
-print "\x{3040}" =~ /\p{InKana1}/ ? "ok $test\n" : "not ok $test\n"; $test++;
-print "\x{303F}" =~ /\P{InKana1}/ ? "ok $test\n" : "not ok $test\n"; $test++;
 
-print "\x{3040}" =~ /\p{InKana2}/ ? "ok $test\n" : "not ok $test\n"; $test++;
-print "\x{303F}" =~ /\P{InKana2}/ ? "ok $test\n" : "not ok $test\n"; $test++;
+    {
+        my $s = 'foo bar baz';
+        my @res;
+        if ('1234' =~ /(?<A>1)(?<B>2)(?<A>3)(?<B>4)/) {
+            foreach my $name (sort keys(%-)) {
+                my $ary = $- {$name};
+                foreach my $idx (0 .. $#$ary) {
+                    push @res, "$name:$idx:$ary->[$idx]";
+                }
+            }
+        }
+        my @expect = qw (A:0:1 A:1:3 B:0:2 B:1:4);
+        iseq "@res", "@expect", "Check %-";
+        eval'
+            no warnings "uninitialized";
+            print for $- {this_key_doesnt_exist};
+        ';
+        ok !$@,'lvalue $- {...} should not throw an exception';
+    }
 
-print "\x{3041}" =~ /\p{InKana3}/ ? "ok $test\n" : "not ok $test\n"; $test++;
-print "\x{3040}" =~ /\P{InKana3}/ ? "ok $test\n" : "not ok $test\n"; $test++;
 
-print "\x{3040}" =~ /\p{InNotKana}/ ? "ok $test\n" : "not ok $test\n"; $test++;
-print "\x{3041}" =~ /\P{InNotKana}/ ? "ok $test\n" : "not ok $test\n"; $test++;
+  SKIP:
+    {
+        # stress test CURLYX/WHILEM.
+        #
+        # This test includes varying levels of nesting, and according to
+        # profiling done against build 28905, exercises every code line in the
+        # CURLYX and WHILEM blocks, except those related to LONGJMP, the
+        # super-linear cache and warnings. It executes about 0.5M regexes
+
+        skip "No psycho tests" if $ENV {PERL_SKIP_PSYCHO_TEST};
+        print "# Set PERL_SKIP_PSYCHO_TEST to skip this test\n";
+        my $r = qr/^
+                    (?:
+                        ( (?:a|z+)+ )
+                        (?:
+                            ( (?:b|z+){3,}? )
+                            (
+                                (?:
+                                    (?:
+                                        (?:c|z+){1,1}?z
+                                    )?
+                                    (?:c|z+){1,1}
+                                )*
+                            )
+                            (?:z*){2,}
+                            ( (?:z+|d)+ )
+                            (?:
+                                ( (?:e|z+)+ )
+                            )*
+                            ( (?:f|z+)+ )
+                        )*
+                        ( (?:z+|g)+ )
+                        (?:
+                            ( (?:h|z+)+ )
+                        )*
+                        ( (?:i|z+)+ )
+                    )+
+                    ( (?:j|z+)+ )
+                    (?:
+                        ( (?:k|z+)+ )
+                    )*
+                    ( (?:l|z+)+ )
+              $/x;
+          
+        my $ok = 1;
+        my $msg = "CURLYX stress test";
+        OUTER:
+          for my $a ("x","a","aa") {
+            for my $b ("x","bbb","bbbb") {
+              my $bs = $a.$b;
+              for my $c ("x","c","cc") {
+                my $cs = $bs.$c;
+                for my $d ("x","d","dd") {
+                  my $ds = $cs.$d;
+                  for my $e ("x","e","ee") {
+                    my $es = $ds.$e;
+                    for my $f ("x","f","ff") {
+                      my $fs = $es.$f;
+                      for my $g ("x","g","gg") {
+                        my $gs = $fs.$g;
+                        for my $h ("x","h","hh") {
+                          my $hs = $gs.$h;
+                          for my $i ("x","i","ii") {
+                            my $is = $hs.$i;
+                            for my $j ("x","j","jj") {
+                              my $js = $is.$j;
+                              for my $k ("x","k","kk") {
+                                my $ks = $js.$k;
+                                for my $l ("x","l","ll") {
+                                  my $ls = $ks.$l;
+                                  if ($ls =~ $r) {
+                                    if ($ls =~ /x/) {
+                                      $msg .= ": unexpected match for [$ls]";
+                                      $ok = 0;
+                                      last OUTER;
+                                    }
+                                    my $cap = "$1$2$3$4$5$6$7$8$9$10$11$12";
+                                    unless ($ls eq $cap) {
+                                      $msg .= ": capture: [$ls], got [$cap]";
+                                      $ok = 0;
+                                      last OUTER;
+                                    }
+                                  }
+                                  else {
+                                    unless ($ls =~ /x/) {
+                                      $msg = ": failed for [$ls]";
+                                      $ok = 0;
+                                      last OUTER;
+                                    }
+                                  }
+                                }
+                              }
+                            }
+                          }
+                        }
+                      }
+                    }
+                  }
+                }
+              }
+            }
+        }
+        ok($ok, $msg);
+    }
 
-sub InConsonant { # Not EBCDIC-aware.
-    return <<EOF;
-0061	007f
--0061
--0065
--0069
--006f
--0075
-EOF
-}
 
-print "d" =~ /\p{InConsonant}/ ? "ok $test\n" : "not ok $test\n"; $test++;
-print "e" =~ /\P{InConsonant}/ ? "ok $test\n" : "not ok $test\n"; $test++;
-
-{
-    print "# [ID 20020630.002] utf8 regex only matches 32k\n";
-    $test = 911;
-    for ([ 'byte', "\x{ff}" ], [ 'utf8', "\x{1ff}" ]) {
-	my($type, $char) = @$_;
-	for my $len (32000, 32768, 33000) {
-	    my $s = $char . "f" x $len;
-	    my $r = $s =~ /$char([f]*)/gc;
-	    print $r ? "ok $test\n" : "not ok $test\t# <$type x $len> fail\n";
-	    ++$test;
-	    print +(!$r or pos($s) == $len + 1) ? "ok $test\n"
-		: "not ok $test\t# <$type x $len> pos @{[ pos($s) ]}\n";
-	    ++$test;
-	}
+    {
+        # \, breaks {3,4}
+        ok "xaaay"    !~ /xa{3\,4}y/, '\, in a pattern';
+        ok "xa{3,4}y" =~ /xa{3\,4}y/, '\, in a pattern';
+
+        # \c\ followed by _
+        ok "x\c_y"    !~ /x\c\_y/,    '\_ in a pattern';
+        ok "x\c\_y"   =~ /x\c\_y/,    '\_ in a pattern';
+
+        # \c\ followed by other characters
+        for my $c ("z", "\0", "!", chr(254), chr(256)) {
+            my $targ = "a\034$c";
+            my $reg  = "a\\c\\$c";
+            ok eval ("qq/$targ/ =~ /$reg/"), "\\c\\ in pattern";
+        }
     }
-}
-
-$test = 923;
 
-$a = bless qr/foo/, 'Foo';
-print(('goodfood' =~ $a ? '' : 'not '),
-	"ok $test\t# reblessed qr// matches\n");
-++$test;
 
-print(($a eq '(?-xism:foo)' ? '' : 'not '),
-	"ok $test\t# reblessed qr// stringizes\n");
-++$test;
+    {
+        local $BugId = '36046';
+        my $str = 'abc'; 
+        my $count = 0;
+        my $mval = 0;
+        my $pval = 0;
+        while ($str =~ /b/g) {$mval = $#-; $pval = $#+; $count ++}
+        iseq $mval,  0, '@- should be empty';
+        iseq $pval,  0, '@+ should be empty';
+        iseq $count, 1, 'Should have matched once only';
+    }
 
-$x = "\x{3fe}";
-$z=$y = "\317\276"; # $y is byte representation of $x
 
-$a = qr/$x/;
-print(($x =~ $a ? '' : 'not '), "ok $test - utf8 interpolation in qr//\n");
-++$test;
+    {   # Test the (*PRUNE) pattern
+        our $count = 0;
+        'aaab' =~ /a+b?(?{$count++})(*FAIL)/;
+        iseq $count, 9, "Expect 9 for no (*PRUNE)";
+        $count = 0;
+        'aaab' =~ /a+b?(*PRUNE)(?{$count++})(*FAIL)/;
+        iseq $count, 3, "Expect 3 with (*PRUNE)";
+        local $_ = 'aaab';
+        $count = 0;
+        1 while /.(*PRUNE)(?{$count++})(*FAIL)/g;
+        iseq $count, 4, "/.(*PRUNE)/";
+        $count = 0;
+        'aaab' =~ /a+b?(??{'(*PRUNE)'})(?{$count++})(*FAIL)/;
+        iseq $count, 3, "Expect 3 with (*PRUNE)";
+        local $_ = 'aaab';
+        $count = 0;
+        1 while /.(??{'(*PRUNE)'})(?{$count++})(*FAIL)/g;
+        iseq $count, 4, "/.(*PRUNE)/";
+    }
 
-print(("a$a" =~ $x ? '' : 'not '),
-      "ok $test - stringifed qr// preserves utf8\n");
-++$test;
 
-print(("a$x" =~ /^a$a\z/ ? '' : 'not '),
-      "ok $test - interpolated qr// preserves utf8\n");
-++$test;
+    {   # Test the (*SKIP) pattern
+        our $count = 0;
+        'aaab' =~ /a+b?(*SKIP)(?{$count++})(*FAIL)/;
+        iseq $count, 1, "Expect 1 with (*SKIP)";
+        local $_ = 'aaab';
+        $count = 0;
+        1 while /.(*SKIP)(?{$count++})(*FAIL)/g;
+        iseq $count, 4, "/.(*SKIP)/";
+        $_ = 'aaabaaab';
+        $count = 0;
+        our @res = ();
+        1 while /(a+b?)(*SKIP)(?{$count++; push @res,$1})(*FAIL)/g;
+        iseq $count, 2, "Expect 2 with (*SKIP)";
+        iseq "@res", "aaab aaab", "Adjacent (*SKIP) works as expected";
+    }
 
-print(("a$x" =~ /^a(??{$a})\z/ ? '' : 'not '),
-      "ok $test - postponed interpolation of qr// preserves utf8\n");
-++$test;
 
-print((length(qr/##/x) == 12 ? '' : 'not '),
-      "ok $test - ## in qr// doesn't corrupt memory [perl #17776]\n");
-++$test;
+    {   # Test the (*SKIP) pattern
+        our $count = 0;
+        'aaab' =~ /a+b?(*MARK:foo)(*SKIP)(?{$count++})(*FAIL)/;
+        iseq $count, 1, "Expect 1 with (*SKIP)";
+        local $_ = 'aaab';
+        $count = 0;
+        1 while /.(*MARK:foo)(*SKIP)(?{$count++})(*FAIL)/g;
+        iseq $count, 4, "/.(*SKIP)/";
+        $_ = 'aaabaaab';
+        $count = 0;
+        our @res = ();
+        1 while /(a+b?)(*MARK:foo)(*SKIP)(?{$count++; push @res,$1})(*FAIL)/g;
+        iseq $count, 2, "Expect 2 with (*SKIP)";
+        iseq "@res", "aaab aaab", "Adjacent (*SKIP) works as expected";
+    }
 
-{ use re 'eval';
 
-print(("$x$x" =~ /^$x(??{$x})\z/ ? '' : 'not '),
-      "ok $test - postponed utf8 string in utf8 re matches utf8\n");
-++$test;
+    {   # Test the (*SKIP) pattern
+        our $count = 0;
+        'aaab' =~ /a*(*MARK:a)b?(*MARK:b)(*SKIP:a)(?{$count++})(*FAIL)/;
+        iseq $count, 3, "Expect 3 with *MARK:a)b?(*MARK:b)(*SKIP:a)";
+        local $_ = 'aaabaaab';
+        $count = 0;
+        our @res = ();
+        1 while
+        /(a*(*MARK:a)b?)(*MARK:x)(*SKIP:a)(?{$count++; push @res,$1})(*FAIL)/g;
+        iseq $count, 5, "Expect 5 with (*MARK:a)b?)(*MARK:x)(*SKIP:a)";
+        iseq "@res", "aaab b aaab b ",
+             "Adjacent (*MARK:a)b?)(*MARK:x)(*SKIP:a) works as expected";
+    }
 
-print(("$y$x" =~ /^$y(??{$x})\z/ ? '' : 'not '),
-      "ok $test - postponed utf8 string in non-utf8 re matches utf8\n");
-++$test;
 
-print(("$y$x" !~ /^$y(??{$y})\z/ ? '' : 'not '),
-      "ok $test - postponed non-utf8 string in non-utf8 re doesn't match utf8\n");
-++$test;
+    {   # Test the (*COMMIT) pattern
+        our $count = 0;
+        'aaabaaab' =~ /a+b?(*COMMIT)(?{$count++})(*FAIL)/;
+        iseq $count, 1, "Expect 1 with (*COMMIT)";
+        local $_ = 'aaab';
+        $count = 0;
+        1 while /.(*COMMIT)(?{$count++})(*FAIL)/g;
+        iseq $count, 1, "/.(*COMMIT)/";
+        $_ = 'aaabaaab';
+        $count = 0;
+        our @res = ();
+        1 while /(a+b?)(*COMMIT)(?{$count++; push @res,$1})(*FAIL)/g;
+        iseq $count, 1, "Expect 1 with (*COMMIT)";
+        iseq "@res", "aaab", "Adjacent (*COMMIT) works as expected";
+    }
 
-print(("$x$x" !~ /^$x(??{$y})\z/ ? '' : 'not '),
-      "ok $test - postponed non-utf8 string in utf8 re doesn't match utf8\n");
-++$test;
 
-print(("$y$y" =~ /^$y(??{$y})\z/ ? '' : 'not '),
-      "ok $test - postponed non-utf8 string in non-utf8 re matches non-utf8\n");
-++$test;
+    {
+        # Test named commits and the $REGERROR var
+        our $REGERROR;
+        for my $name ('', ':foo') {
+            for my $pat ("(*PRUNE$name)",
+                         ($name ? "(*MARK$name)" : "") . "(*SKIP$name)",
+                         "(*COMMIT$name)") {                         
+                for my $suffix ('(*FAIL)', '') {
+                    'aaaab' =~ /a+b$pat$suffix/;
+                    iseq $REGERROR,
+                         ($suffix ? ($name ? 'foo' : "1") : ""),
+                        "Test $pat and \$REGERROR $suffix";
+                }
+            }
+        }
+    }
 
-print(("$x$y" =~ /^$x(??{$y})\z/ ? '' : 'not '),
-      "ok $test - postponed non-utf8 string in utf8 re matches non-utf8\n");
-++$test;
-$y = $z; # reset $y after upgrade
 
-print(("$x$y" !~ /^$x(??{$x})\z/ ? '' : 'not '),
-      "ok $test - postponed utf8 string in utf8 re doesn't match non-utf8\n");
-++$test;
-$y = $z; # reset $y after upgrade
+    {
+        # Test named commits and the $REGERROR var
+        package Fnorble;
+        our $REGERROR;
+        for my $name ('', ':foo') {
+            for my $pat ("(*PRUNE$name)",
+                         ($name ? "(*MARK$name)" : "") . "(*SKIP$name)",
+                         "(*COMMIT$name)") {                         
+                for my $suffix ('(*FAIL)','') {
+                    'aaaab' =~ /a+b$pat$suffix/;
+                  ::iseq $REGERROR,
+                         ($suffix ? ($name ? 'foo' : "1") : ""),
+                        "Test $pat and \$REGERROR $suffix";
+                }
+            }
+        }      
+    }    
 
-print(("$y$y" !~ /^$y(??{$x})\z/ ? '' : 'not '),
-      "ok $test - postponed utf8 string in non-utf8 re doesn't match non-utf8\n");
-++$test;
 
-} # no re 'eval'
+    {
+        # Test named commits and the $REGERROR var
+        local $Message = '$REGERROR';
+        our $REGERROR;
+        for my $word (qw (bar baz bop)) {
+            $REGERROR = "";
+            "aaaaa$word" =~
+              /a+(?:bar(*COMMIT:bar)|baz(*COMMIT:baz)|bop(*COMMIT:bop))(*FAIL)/;
+            iseq $REGERROR, $word;
+        }    
+    }
 
-print "# more user-defined character properties\n";
 
-sub IsSyriac1 {
-    return <<'END';
-0712	072C
-0730	074A
-END
-}
+    {
+        local $BugId = '40684';
+        local $Message = '/m in precompiled regexp';
+        my $s = "abc\ndef";
+        my $rex = qr'^abc$'m;
+        ok $s =~ m/$rex/;
+        ok $s =~ m/^abc$/m;
+    }
 
-ok("\x{0712}" =~ /\p{IsSyriac1}/, '\x{0712}, \p{IsSyriac1}');
-ok("\x{072F}" =~ /\P{IsSyriac1}/, '\x{072F}, \P{IsSyriac1}');
 
-sub Syriac1 {
-    return <<'END';
-0712	072C
-0730	074A
-END
-}
+    {
+        #Mindnumbingly simple test of (*THEN)
+        for ("ABC","BAX") {
+            ok /A (*THEN) X | B (*THEN) C/x, "Simple (*THEN) test";
+        }
+    }
 
-ok("\x{0712}" =~ /\p{Syriac1}/, '\x{0712}, \p{Syriac1}');
-ok("\x{072F}" =~ /\P{Syriac1}/, '\x{072F}, \p{Syriac1}');
 
-print "# user-defined character properties may lack \\n at the end\n";
-sub InGreekSmall   { return "03B1\t03C9" }
-sub InGreekCapital { return "0391\t03A9\n-03A2" }
+    {
+        local $Message = "Relative Recursion";
+        my $parens = qr/(\((?:[^()]++|(?-1))*+\))/;
+        local $_ = 'foo((2*3)+4-3) + bar(2*(3+4)-1*(2-3))';
+        my ($all, $one, $two) = ('', '', '');
+        ok /foo $parens \s* \+ \s* bar $parens/x;
+        iseq $1, '((2*3)+4-3)';
+        iseq $2, '(2*(3+4)-1*(2-3))';
+        iseq $&, 'foo((2*3)+4-3) + bar(2*(3+4)-1*(2-3))';
+        iseq $&, $_;
+    }
 
-ok("\x{03C0}" =~ /\p{InGreekSmall}/,   "Small pi");
-ok("\x{03C2}" =~ /\p{InGreekSmall}/,   "Final sigma");
-ok("\x{03A0}" =~ /\p{InGreekCapital}/, "Capital PI");
-ok("\x{03A2}" =~ /\P{InGreekCapital}/, "Reserved");
+    {
+        my $spaces="      ";
+        local $_ = join 'bar', $spaces, $spaces;
+        our $count = 0;
+        s/(?>\s+bar)(?{$count++})//g;
+        iseq $_, $spaces, "SUSPEND final string";
+        iseq $count, 1, "Optimiser should have prevented more than one match";
+    }
 
-sub AsciiHexAndDash {
-    return <<'END';
-+utf8::ASCII_Hex_Digit
-+utf8::Dash
-END
-}
+    {
+        local $BugId   = '36909';
+        local $Message = '(?: ... )? should not lose $^R';
+        $^R = 'Nothing';
+        {
+            local $^R = "Bad";
+            ok 'x foofoo y' =~ m {
+                      (foo) # $^R correctly set
+                      (?{ "last regexp code result" })
+            }x;
+            iseq $^R, 'last regexp code result';
+        }
+        iseq $^R, 'Nothing';
+
+        {
+            local $^R = "Bad";
+
+            ok 'x foofoo y' =~ m {
+                      (?:foo|bar)+ # $^R correctly set
+                      (?{ "last regexp code result" })
+            }x;
+            iseq $^R, 'last regexp code result';
+        }
+        iseq $^R, 'Nothing';
+
+        {
+            local $^R = "Bad";
+            ok 'x foofoo y' =~ m {
+                      (foo|bar)\1+ # $^R undefined
+                      (?{ "last regexp code result" })
+            }x;
+            iseq $^R, 'last regexp code result';
+        }
+        iseq $^R, 'Nothing';
+
+        {
+            local $^R = "Bad";
+            ok 'x foofoo y' =~ m {
+                      (foo|bar)\1 # This time without the +
+                      (?{"last regexp code result"})
+            }x;
+            iseq $^R, 'last regexp code result';
+        }
+        iseq $^R, 'Nothing';
+    }
 
-ok("-" =~ /\p{Dash}/,            "'-' is Dash");
-ok("A" =~ /\p{ASCII_Hex_Digit}/, "'A' is ASCII_Hex_Digit");
-ok("-" =~ /\p{AsciiHexAndDash}/, "'-' is AsciiHexAndDash");
-ok("A" =~ /\p{AsciiHexAndDash}/, "'A' is AsciiHexAndDash");
-
-{
-    print "# Change #18179\n";
-    # previously failed with "panic: end_shift
-    my $s = "\x{100}" x 5;
-    my $ok = $s =~ /(\x{100}{4})/;
-    my($ord, $len) = (ord $1, length $1);
-    print +($ok && $ord == 0x100 && $len == 4)
-	    ? "ok $test\n" : "not ok $test\t# $ok/$ord/$len\n";
-    ++$test;
-}
 
-{
-    print "# [perl #15763]\n";
+    {
+        local $BugId   = '22395';
+        local $Message = 'Match is linear, not quadratic';
+        our $count;
+        for my $l (10, 100, 1000) {
+            $count = 0;
+            ('a' x $l) =~ /(.*)(?{$count++})[bc]/;
+            local $TODO = "Should be L+1 not L*(L+3)/2 (L=$l)";
+            iseq $count, $l + 1;
+        }
+    }
 
-    $a = "x\x{100}";
-    chop $a; # but leaves the UTF-8 flag
-    $a .= "y"; # 1 byte before "y"
 
-    ok($a =~ /^\C/,      'match one \C on 1-byte UTF-8');
-    ok($a =~ /^\C{1}/,   'match \C{1}');
+    {
+        local $BugId   = '22614';
+        local $Message = '@-/@+ should not have undefined values';
+        local $_ = 'ab';
+        our @len = ();
+        /(.){1,}(?{push @len,0+@-})(.){1,}(?{})^/;
+        iseq "@len", "2 2 2";
+    }
 
-    ok($a =~ /^\Cy/,      'match \Cy');
-    ok($a =~ /^\C{1}y/,   'match \C{1}y');
 
-    $a = "\x{100}y"; # 2 bytes before "y"
+    {
+        local $BugId   = '18209';
+        local $Message = '$& set on s///';
+        my $text = ' word1 word2 word3 word4 word5 word6 ';
+
+        my @words = ('word1', 'word3', 'word5');
+        my $count;
+        foreach my $word (@words) {
+            $text =~ s/$word\s//gi; # Leave a space to seperate words
+                                    # in the resultant str.
+            # The following block is not working.
+            if ($&) {
+                $count ++;
+            }
+            # End bad block
+        }
+        iseq $count, 3;
+        iseq $text, ' word2 word4 word6 ';
+    }
 
-    ok($a =~ /^\C/,       'match one \C on 2-byte UTF-8');
-    ok($a =~ /^\C{1}/,    'match \C{1}');
-    ok($a =~ /^\C\C/,     'match two \C');
-    ok($a =~ /^\C{2}/,    'match \C{2}');
 
-    ok($a =~ /^\C\C\C/,    'match three \C on 2-byte UTF-8 and a byte');
-    ok($a =~ /^\C{3}/,     'match \C{3}');
+    {
+        # RT#6893
+        local $BugId = '6893';
+        local $_ = qq (A\nB\nC\n); 
+        my @res;
+        while (m#(\G|\n)([^\n]*)\n#gsx) { 
+            push @res, "$2"; 
+            last if @res > 3;
+        }
+        iseq "@res", "A B C", "/g pattern shouldn't infinite loop";
+    }
 
-    ok($a =~ /^\C\Cy/,     'match two \C');
-    ok($a =~ /^\C{2}y/,    'match \C{2}');
 
-    ok($a !~ /^\C\C\Cy/,    q{don't match three \Cy});
-    ok($a !~ /^\C{2}\Cy/,   q{don't match \C{3}y});
+    {
+        # From Message-ID: <877ixs6oa6.fsf@k75.linux.bogus>
+        my $dow_name = "nada";
+        my $parser = "(\$dow_name) = \$time_string =~ /(D\x{e9}\\ " .
+                     "C\x{e9}adaoin|D\x{e9}\\ Sathairn|\\w+|\x{100})/";
+        my $time_string = "D\x{e9} C\x{e9}adaoin";
+        eval $parser;
+        ok !$@, "Test Eval worked";
+        iseq $dow_name, $time_string, "UTF-8 trie common prefix extraction";
+    }
 
-    $a = "\x{1000}y"; # 3 bytes before "y"
 
-    ok($a =~ /^\C/,         'match one \C on three-byte UTF-8');
-    ok($a =~ /^\C{1}/,      'match \C{1}');
-    ok($a =~ /^\C\C/,       'match two \C');
-    ok($a =~ /^\C{2}/,      'match \C{2}');
-    ok($a =~ /^\C\C\C/,     'match three \C');
-    ok($a =~ /^\C{3}/,      'match \C{3}');
+    {
+        my $v;
+        ($v = 'bar') =~ /(\w+)/g;
+        $v = 'foo';
+        iseq "$1", 'bar', '$1 is safe after /g - may fail due ' .
+                          'to specialized config in pp_hot.c'
+    }
 
-    ok($a =~ /^\C\C\C\C/,   'match four \C on three-byte UTF-8 and a byte');
-    ok($a =~ /^\C{4}/,      'match \C{4}');
 
-    ok($a =~ /^\C\C\Cy/,    'match three \Cy');
-    ok($a =~ /^\C{3}y/,     'match \C{3}y');
+    {
+        local $Message = "http://nntp.perl.org/group/perl.perl5.porters/118663";
+        my $qr_barR1 = qr/(bar)\g-1/;
+        ok "foobarbarxyz" =~ $qr_barR1;
+        ok "foobarbarxyz" =~ qr/foo${qr_barR1}xyz/;
+        ok "foobarbarxyz" =~ qr/(foo)${qr_barR1}xyz/;
+        ok "foobarbarxyz" =~ qr/(foo)(bar)\g{-1}xyz/;
+        ok "foobarbarxyz" =~ qr/(foo${qr_barR1})xyz/;
+        ok "foobarbarxyz" =~ qr/(foo(bar)\g{-1})xyz/;
+    } 
 
-    ok($a !~ /^\C\C\C\C\y/, q{don't match four \Cy});
-    ok($a !~ /^\C{4}y/,     q{don't match \C{4}y});
-}
 
-$_ = 'aaaaaaaaaa';
-utf8::upgrade($_); chop $_; $\="\n";
-ok(/[^\s]+/, "m/[^\s]/ utf8");
-ok(/[^\d]+/, "m/[^\d]/ utf8");
-ok(($a = $_, $_ =~ s/[^\s]+/./g), "s/[^\s]/ utf8");
-ok(($a = $_, $a =~ s/[^\d]+/./g), "s/[^\s]/ utf8");
-
-ok("\x{100}" =~ /\x{100}/, "[perl #15397]");
-ok("\x{100}" =~ /(\x{100})/, "[perl #15397]");
-ok("\x{100}" =~ /(\x{100}){1}/, "[perl #15397]");
-ok("\x{100}\x{100}" =~ /(\x{100}){2}/, "[perl #15397]");
-ok("\x{100}\x{100}" =~ /(\x{100})(\x{100})/, "[perl #15397]");
-
-$x = "CD";
-$x =~ /(AB)*?CD/;
-ok(!defined $1, "[perl #7471]");
-
-$x = "CD";
-$x =~ /(AB)*CD/;
-ok(!defined $1, "[perl #7471]");
-
-$pattern = "^(b+?|a){1,2}c";
-ok("bac"    =~ /$pattern/ && $1 eq 'a', "[perl #3547]");
-ok("bbac"   =~ /$pattern/ && $1 eq 'a', "[perl #3547]");
-ok("bbbac"  =~ /$pattern/ && $1 eq 'a', "[perl #3547]");
-ok("bbbbac" =~ /$pattern/ && $1 eq 'a', "[perl #3547]");
-
-{
-    # [perl #18232]
-    "\x{100}" =~ /(.)/;
-    ok( $1 eq "\x{100}", '$1 is utf-8 [perl #18232]' );
-    { 'a' =~ /./; }
-    ok( $1 eq "\x{100}", '$1 is still utf-8' );
-    ok( $1 ne "\xC4\x80", '$1 is not non-utf-8' );
-}
+    {
+        local $BugId   = '41010';
+        local $Message = 'No optimizer bug';
+        my @tails  = ('', '(?(1))', '(|)', '()?');    
+        my @quants = ('*','+');
+        my $doit = sub {
+            my $pats = shift;
+            for (@_) {
+                for my $pat (@$pats) {
+                    for my $quant (@quants) {
+                        for my $tail (@tails) {
+                            my $re = "($pat$quant\$)$tail";
+                            ok /$re/  && $1 eq $_, "'$_' =~ /$re/";
+                            ok /$re/m && $1 eq $_, "'$_' =~ /$re/m";
+                        }
+                    }
+                }
+            }
+        };    
+        
+        my @dpats = ('\d',
+                     '[1234567890]',
+                     '(1|[23]|4|[56]|[78]|[90])',
+                     '(?:1|[23]|4|[56]|[78]|[90])',
+                     '(1|2|3|4|5|6|7|8|9|0)',
+                     '(?:1|2|3|4|5|6|7|8|9|0)');
+        my @spats = ('[ ]', ' ', '( |\t)', '(?: |\t)', '[ \t]', '\s');
+        my @sstrs = ('  ');
+        my @dstrs = ('12345');
+        $doit -> (\@spats, @sstrs);
+        $doit -> (\@dpats, @dstrs);
+    }
 
-{
-    use utf8;
-    my $attr = 'Name-1' ;
 
-    my $NormalChar          = qr/[\p{IsDigit}\p{IsLower}\p{IsUpper}]/;
-    my $NormalWord          = qr/${NormalChar}+?/;
-    my $PredNameHyphen      = qr/^${NormalWord}(\-${NormalWord})*?$/;
+    {
+        local $Message = '$REGMARK';
+        our @r = ();
+        our ($REGMARK, $REGERROR);
+        ok 'foofoo' =~ /foo (*MARK:foo) (?{push @r,$REGMARK}) /x;
+        iseq "@r","foo";           
+        iseq $REGMARK, "foo";
+        ok 'foofoo' !~ /foo (*MARK:foo) (*FAIL) /x;
+        ok !$REGMARK;
+        iseq $REGERROR, 'foo';
+    }
 
-    $attr =~ /^$/;
-    ok( $attr =~ $PredNameHyphen, "[perl #19767] original test" );
-}
 
-{
-    use utf8;
-    "a" =~ m/[b]/;
-    ok ( "0" =~ /\p{N}+\z/, "[perl #19767] variant test" );
-}
+    {
+        local $Message = '\K test';
+        my $x;
+        $x = "abc.def.ghi.jkl";
+        $x =~ s/.*\K\..*//;
+        iseq $x, "abc.def.ghi";
+        
+        $x = "one two three four";
+        $x =~ s/o+ \Kthree//g;
+        iseq $x, "one two  four";
+        
+        $x = "abcde";
+        $x =~ s/(.)\K/$1/g;
+        iseq $x, "aabbccddee";
+    }
 
-{
 
-    $p = 1;
-    foreach (1,2,3,4) {
-	    $p++ if /(??{ $p })/
-    }
-    ok ($p == 5, "[perl #20683] (??{ }) returns stale values");
-    { package P; $a=1; sub TIESCALAR { bless[] } sub FETCH { $a++ } }
-    tie $p, P;
-    foreach (1,2,3,4) {
-	    /(??{ $p })/
+    {
+        sub kt {
+            return '4' if $_[0] eq '09028623';
+        }
+        # Nested EVAL using PL_curpm (via $1 or friends)
+        my $re;
+        our $grabit = qr/ ([0-6][0-9]{7}) (??{ kt $1 }) [890] /x;
+        $re = qr/^ ( (??{ $grabit }) ) $ /x;
+        my @res = '0902862349' =~ $re;
+        iseq join ("-", @res), "0902862349",
+            'PL_curpm is set properly on nested eval';
+
+        our $qr = qr/ (o) (??{ $1 }) /x;
+        ok 'boob'=~/( b (??{ $qr }) b )/x && 1, "PL_curpm, nested eval";
     }
-    ok ( $p == 5, "(??{ }) returns stale values");
-}
 
-{
-  # Subject: Odd regexp behavior
-  # From: Markus Kuhn <Markus.Kuhn@cl.cam.ac.uk>
-  # Date: Wed, 26 Feb 2003 16:53:12 +0000
-  # Message-Id: <E18o4nw-0008Ly-00@wisbech.cl.cam.ac.uk>
-  # To: perl-unicode@perl.org
-    
-  $x = "\x{2019}\nk"; $x =~ s/(\S)\n(\S)/$1 $2/sg;
-  ok($x eq "\x{2019} k", "Markus Kuhn 2003-02-26");
 
-  $x = "b\nk"; $x =~ s/(\S)\n(\S)/$1 $2/sg;
-  ok($x eq "b k", "Markus Kuhn 2003-02-26");
+    {
+        use charnames ":full";
+        ok "\N{ROMAN NUMERAL ONE}" =~ /\p{Alphabetic}/, "I =~ Alphabetic";
+        ok "\N{ROMAN NUMERAL ONE}" =~ /\p{Uppercase}/,  "I =~ Uppercase";
+        ok "\N{ROMAN NUMERAL ONE}" !~ /\p{Lowercase}/,  "I !~ Lowercase";
+        ok "\N{ROMAN NUMERAL ONE}" =~ /\p{IDStart}/,    "I =~ ID_Start";
+        ok "\N{ROMAN NUMERAL ONE}" =~ /\p{IDContinue}/, "I =~ ID_Continue";
+        ok "\N{SMALL ROMAN NUMERAL ONE}" =~ /\p{Alphabetic}/, "i =~ Alphabetic";
+        ok "\N{SMALL ROMAN NUMERAL ONE}" !~ /\p{Uppercase}/,  "i !~ Uppercase";
+        ok "\N{SMALL ROMAN NUMERAL ONE}" =~ /\p{Lowercase}/,  "i =~ Lowercase";
+        ok "\N{SMALL ROMAN NUMERAL ONE}" =~ /\p{IDStart}/,    "i =~ ID_Start";
+        ok "\N{SMALL ROMAN NUMERAL ONE}" =~ /\p{IDContinue}/, "i =~ ID_Continue"
+    }
 
-  ok("\x{2019}" =~ /\S/, "Markus Kuhn 2003-02-26");
-}
 
-{
-    my $i;
-    ok('-1-3-5-' eq join('', split /((??{$i++}))/, '-1-3-5-'),
-	"[perl #21411] (??{ .. }) corrupts split's stack");
-    split /(?{'WOW'})/, 'abc';
-    ok('a|b|c' eq join ('|', @_),
-       "[perl #21411] (?{ .. }) version of the above");
-}
+    {
+        # requirement of Unicode Technical Standard #18, 1.7 Code Points
+        # cf. http://www.unicode.org/reports/tr18/#Supplementary_Characters
+        for my $u (0x7FF, 0x800, 0xFFFF, 0x10000) {
+            no warnings 'utf8'; # oops
+            my $c = chr $u;
+            my $x = sprintf '%04X', $u;
+            ok "A${c}B" =~ /A[\0-\x{10000}]B/, "Unicode range - $x";
+        }
+    }
 
-{
-    # XXX DAPM 13-Apr-06. Recursive split is still broken. It's only luck it
-    # hasn't been crashing. Disable this test until it is fixed properly.
-    # XXX also check what it returns rather than just doing ok(1,...)
-    # split /(?{ split "" })/, "abc";
-    ok(1,'cache_re & "(?{": it dumps core in 5.6.1 & 5.8.0');
-}
 
-{
-    ok("\x{100}\n" =~ /\x{100}\n$/, "UTF8 length cache and fbm_compile");  
-}
+    {
+        my $res="";
+
+        if ('1' =~ /(?|(?<digit>1)|(?<digit>2))/) {
+            $res = "@{$- {digit}}";
+        }
+        iseq $res, "1",
+            "Check that (?|...) doesnt cause dupe entries in the names array";
+        
+        $res = "";
+        if ('11' =~ /(?|(?<digit>1)|(?<digit>2))(?&digit)/) {
+            $res = "@{$- {digit}}";
+        }
+        iseq $res, "1", "Check that (?&..) to a buffer inside " .
+                        "a (?|...) goes to the leftmost";
+    }
 
-{
-    package Str;
-    use overload q/""/ => sub { ${$_[0]}; };
-    sub new { my ($c, $v) = @_; bless \$v, $c; }
 
-    package main;
-    $_ = Str->new("a\x{100}/\x{100}b");
-    ok(join(":", /\b(.)\x{100}/g) eq "a:/", "re_intuit_start and PL_bostr");
-}
+    {
+        use warnings;
+        local $Message = "ASCII pattern that really is UTF-8";
+        my @w;
+        local $SIG {__WARN__} = sub {push @w, "@_"};
+        my $c = qq (\x{DF}); 
+        ok $c =~ /${c}|\x{100}/;
+        ok @w == 0;
+    }    
 
-{
-    $_ = "code:   'x' { '...' }\n"; study;
-    my @x; push @x, $& while m/'[^\']*'/gx;
-    ok(join(":", @x) eq "'x':'...'",
-       "[perl #17757] Parse::RecDescent triggers infinite loop");
-}
 
-{
-    my $re = qq/^([^X]*)X/;
-    utf8::upgrade($re);
-    ok("\x{100}X" =~ /$re/, "S_cl_and ANYOF_UNICODE & ANYOF_INVERTED");
-}
+    {
+        local $Message = "Corruption of match results of qr// across scopes";
+        my $qr = qr/(fo+)(ba+r)/;
+        'foobar' =~ /$qr/;
+        iseq "$1$2", "foobar";
+        {
+            'foooooobaaaaar' =~ /$qr/;
+            iseq "$1$2", 'foooooobaaaaar';    
+        }
+        iseq "$1$2", "foobar";
+    }
 
-# bug #22354
-sub func ($) {
-    ok( "a\nb" !~ /^b/, $_[0] );
-    ok( "a\nb" =~ /^b/m, "$_[0] - with /m" );
-}
-func "standalone";
-$_ = "x"; s/x/func "in subst"/e;
-$_ = "x"; s/x/func "in multiline subst"/em;
-#$_ = "x"; /x(?{func "in regexp"})/;
-#$_ = "x"; /x(?{func "in multiline regexp"})/m;
 
-# bug #19049
-$_="abcdef\n";
-@x = m/./g;
-ok("abcde" eq "$`", '# TODO #19049 - global match not setting $`');
+    {
+        local $Message = "HORIZWS";
+        local $_ = "\t \r\n \n \t".chr(11)."\n";
+        s/\H/H/g;
+        s/\h/h/g;
+        iseq $_, "hhHHhHhhHH";
+        $_ = "\t \r\n \n \t" . chr (11) . "\n";
+        utf8::upgrade ($_);
+        s/\H/H/g;
+        s/\h/h/g;
+        iseq $_, "hhHHhHhhHH";
+    }    
 
-ok("123\x{100}" =~ /^.*1.*23\x{100}$/, 'uft8 + multiple floating substr');
 
-# LATIN SMALL/CAPITAL LETTER A WITH MACRON
-ok("  \x{101}" =~ qr/\x{100}/i,
-   "<20030808193656.5109.1@llama.ni-s.u-net.com>");
+    {
+        local $Message = "Various whitespace special patterns";
+        my @h = map {chr $_}   0x09,   0x20,   0xa0, 0x1680, 0x180e, 0x2000,
+                             0x2001, 0x2002, 0x2003, 0x2004, 0x2005, 0x2006,
+                             0x2007, 0x2008, 0x2009, 0x200a, 0x202f, 0x205f,
+                             0x3000;
+        my @v = map {chr $_}   0x0a,   0x0b,   0x0c,   0x0d,   0x85, 0x2028,
+                             0x2029;
+        my @lb = ("\x0D\x0A", map {chr $_} 0x0A .. 0x0D, 0x85, 0x2028, 0x2029);
+        foreach my $t ([\@h,  qr/\h/, qr/\h+/],
+                       [\@v,  qr/\v/, qr/\v+/],
+                       [\@lb, qr/\R/, qr/\R+/],) {
+            my $ary = shift @$t;
+            foreach my $pat (@$t) {
+                foreach my $str (@$ary) {
+                    ok $str =~ /($pat)/, $pat;
+                    iseq $1, $str, $pat;
+                    utf8::upgrade ($str);
+                    ok $str =~ /($pat)/, "Upgraded string - $pat";
+                    iseq $1, $str, "Upgraded string - $pat";
+                }
+            }
+        }
+    }
 
-# LATIN SMALL/CAPITAL LETTER A WITH RING BELOW
-ok("  \x{1E01}" =~ qr/\x{1E00}/i,
-   "<20030808193656.5109.1@llama.ni-s.u-net.com>");
 
-# DESERET SMALL/CAPITAL LETTER LONG I
-ok("  \x{10428}" =~ qr/\x{10400}/i,
-   "<20030808193656.5109.1@llama.ni-s.u-net.com>");
+    {
+        local $Message = "Check that \\xDF match properly in its various forms";
+        # Test that \xDF matches properly. this is pretty hacky stuff,
+        # but its actually needed. The malarky with '-' is to prevent
+        # compilation caching from playing any role in the test.
+        my @df = (chr (0xDF), '-', chr (0xDF));
+        utf8::upgrade ($df [2]);
+        my @strs = ('ss', 'sS', 'Ss', 'SS', chr (0xDF));
+        my @ss = map {("$_", "$_")} @strs;
+        utf8::upgrade ($ss [$_ * 2 + 1]) for 0 .. $#strs;
+
+        for my $ssi (0 .. $#ss) {
+            for my $dfi (0 .. $#df) {
+                my $pat = $df [$dfi];
+                my $str = $ss [$ssi];
+                my $utf_df = ($dfi > 1) ? 'utf8' : '';
+                my $utf_ss = ($ssi % 2) ? 'utf8' : '';
+                (my $sstr = $str) =~ s/\xDF/\\xDF/;
+
+                if ($utf_df || $utf_ss || length ($ss [$ssi]) == 1) {
+                    my $ret = $str =~ /$pat/i;
+                    next if $pat eq '-';
+                    ok $ret, "\"$sstr\" =~ /\\xDF/i " .
+                             "(str is @{[$utf_ss||'latin']}, pat is " .
+                             "@{[$utf_df||'latin']})";
+                }
+                else {
+                    my $ret = $str !~ /$pat/i;
+                    next if $pat eq '-';
+                    ok $ret, "\"$sstr\" !~ /\\xDF/i " .
+                             "(str is @{[$utf_ss||'latin']}, pat is " .
+                             "@{[$utf_df||'latin']})";
+                }
+            }
+        }
+    }
 
-# LATIN SMALL/CAPITAL LETTER A WITH RING BELOW + 'X'
-ok("  \x{1E01}x" =~ qr/\x{1E00}X/i,
-   "<20030808193656.5109.1@llama.ni-s.u-net.com>");
 
-{
-    # [perl #23769] Unicode regex broken on simple example
-    # regrepeat() didn't handle UTF-8 EXACT case right.
+    {
+        local $Message = "BBC(Bleadperl Breaks CPAN) Today: String::Multibyte";
+        my $re  = qr/(?:[\x00-\xFF]{4})/;
+        my $hyp = "\0\0\0-";
+        my $esc = "\0\0\0\\";
 
-    my $s = "\x{a0}\x{a0}\x{a0}\x{100}"; chop $s;
+        my $str = "$esc$hyp$hyp$esc$esc";
+        my @a = ($str =~ /\G(?:\Q$esc$esc\E|\Q$esc$hyp\E|$re)/g);
 
-    ok($s =~ /\x{a0}/,       "[perl #23769]");
-    ok($s =~ /\x{a0}+/,      "[perl #23769]");
-    ok($s =~ /\x{a0}\x{a0}/, "[perl #23769]");
+        iseq @a,3;
+        local $" = "=";
+        iseq "@a","$esc$hyp=$hyp=$esc$esc";
+    }
 
-    ok("aaa\x{100}" =~ /(a+)/, "[perl #23769] easy invariant");
-    ok($1 eq "aaa", "[perl #23769]");
 
-    ok("\xa0\xa0\xa0\x{100}" =~ /(\xa0+)/, "[perl #23769] regrepeat invariant");
-    ok($1 eq "\xa0\xa0\xa0", "[perl #23769]");
+    {
+        # Test for keys in %+ and %-
+        local $Message = 'Test keys in %+ and %-';
+        no warnings 'uninitialized';
+        my $_ = "abcdef";
+        /(?<foo>a)|(?<foo>b)/;
+        iseq ((join ",", sort keys %+), "foo");
+        iseq ((join ",", sort keys %-), "foo");
+        iseq ((join ",", sort values %+), "a");
+        iseq ((join ",", sort map "@$_", values %-), "a ");
+        /(?<bar>a)(?<bar>b)(?<quux>.)/;
+        iseq ((join ",", sort keys %+), "bar,quux");
+        iseq ((join ",", sort keys %-), "bar,quux");
+        iseq ((join ",", sort values %+), "a,c"); # leftmost
+        iseq ((join ",", sort map "@$_", values %-), "a b,c");
+        /(?<un>a)(?<deux>c)?/; # second buffer won't capture
+        iseq ((join ",", sort keys %+), "un");
+        iseq ((join ",", sort keys %-), "deux,un");
+        iseq ((join ",", sort values %+), "a");
+        iseq ((join ",", sort map "@$_", values %-), ",a");
+    }
 
-    ok("ababab\x{100}  " =~ /((?:ab)+)/, "[perl #23769] hard invariant");
-    ok($1 eq "ababab", "[perl #23769]");
 
-    ok("\xa0\xa1\xa0\xa1\xa0\xa1\x{100}" =~ /((?:\xa0\xa1)+)/, "[perl #23769] hard variant");
-    ok($1 eq "\xa0\xa1\xa0\xa1\xa0\xa1", "[perl #23769]");
+    {
+        # length() on captures, the numbered ones end up in Perl_magic_len
+        my $_ = "aoeu \xe6var ook";
+        /^ \w+ \s (?<eek>\S+)/x;
+
+        iseq length ($`),      0, q[length $`];
+        iseq length ($'),      4, q[length $'];
+        iseq length ($&),      9, q[length $&];
+        iseq length ($1),      4, q[length $1];
+        iseq length ($+{eek}), 4, q[length $+{eek} == length $1];
+    }
 
-    ok("aaa\x{100}     " =~ /(a+?)/, "[perl #23769] easy invariant");
-    ok($1 eq "a", "[perl #23769]");
 
-    ok("\xa0\xa0\xa0\x{100}    " =~ /(\xa0+?)/, "[perl #23769] regrepeat variant");
-    ok($1 eq "\xa0", "[perl #23769]");
+    {
+        my $ok = -1;
+
+        $ok = exists ($-{x}) ? 1 : 0 if 'bar' =~ /(?<x>foo)|bar/;
+        iseq $ok, 1, '$-{x} exists after "bar"=~/(?<x>foo)|bar/';
+        iseq scalar (%+), 0, 'scalar %+ == 0 after "bar"=~/(?<x>foo)|bar/';
+        iseq scalar (%-), 1, 'scalar %- == 1 after "bar"=~/(?<x>foo)|bar/';
+
+        $ok = -1;
+        $ok = exists ($+{x}) ? 1 : 0 if 'bar' =~ /(?<x>foo)|bar/;
+        iseq $ok, 0, '$+{x} not exists after "bar"=~/(?<x>foo)|bar/';
+        iseq scalar (%+), 0, 'scalar %+ == 0 after "bar"=~/(?<x>foo)|bar/';
+        iseq scalar (%-), 1, 'scalar %- == 1 after "bar"=~/(?<x>foo)|bar/';
+
+        $ok = -1;
+        $ok = exists ($-{x}) ? 1 : 0 if 'foo' =~ /(?<x>foo)|bar/;
+        iseq $ok, 1, '$-{x} exists after "foo"=~/(?<x>foo)|bar/';
+        iseq scalar (%+), 1, 'scalar %+ == 1 after "foo"=~/(?<x>foo)|bar/';
+        iseq scalar (%-), 1, 'scalar %- == 1 after "foo"=~/(?<x>foo)|bar/';
+
+        $ok = -1;
+        $ok = exists ($+{x}) ? 1 : 0 if 'foo'=~/(?<x>foo)|bar/;
+        iseq $ok, 1, '$+{x} exists after "foo"=~/(?<x>foo)|bar/';
+    }
 
-    ok("ababab\x{100}  " =~ /((?:ab)+?)/, "[perl #23769] hard invariant");
-    ok($1 eq "ab", "[perl #23769]");
 
-    ok("\xa0\xa1\xa0\xa1\xa0\xa1\x{100}" =~ /((?:\xa0\xa1)+?)/, "[perl #23769] hard variant");
-    ok($1 eq "\xa0\xa1", "[perl #23769]");
+    {
+        local $_;
+        ($_ = 'abc') =~ /(abc)/g;
+        $_ = '123'; 
+        iseq "$1", 'abc', "/g leads to unsafe match vars: $1";
+    }
 
-    ok("\xc4\xc4\xc4" !~ /(\x{100}+)/, "[perl #23769] don't match first byte of utf8 representation");
-    ok("\xc4\xc4\xc4" !~ /(\x{100}+?)/, "[perl #23769] don't match first byte of utf8 representation");
-}
 
-for (120 .. 130) {
-    my $head = 'x' x $_;
-    for my $tail ('\x{0061}', '\x{1234}') {
-	ok(
-	    eval qq{ "$head$tail" =~ /$head$tail/ },
-	    '\x{...} misparsed in regexp near 127 char EXACT limit'
-	);
+    {
+        local $Message = 'Message-ID: <20070818091501.7eff4831@r2d2>';
+        my $str = "";
+        for (0 .. 5) {
+            my @x;
+            $str .= "@x"; # this should ALWAYS be the empty string
+            'a' =~ /(a|)/;
+            push @x, 1;
+        }
+        iseq length ($str), 0, "Trie scope error, string should be empty";
+        $str = "";
+        my @foo = ('a') x 5;
+        for (@foo) {
+            my @bar;
+            $str .= "@bar";
+            s/a|/push @bar, 1/e;
+        }
+        iseq length ($str), 0, "Trie scope error, string should be empty";
     }
-}
 
-# perl #25269: panic: pp_match start/end pointers
-ok("a-bc" eq eval {
-	my($x, $y) = "bca" =~ /^(?=.*(a)).*(bc)/;
-	"$x-$y";
-}, 'captures can move backwards in string');
-
-# perl #27940: \cA not recognized in character classes
-ok("a\cAb" =~ /\cA/, '\cA in pattern');
-ok("a\cAb" =~ /[\cA]/, '\cA in character class');
-ok("a\cAb" =~ /[\cA-\cB]/, '\cA in character class range');
-ok("abc" =~ /[^\cA-\cB]/, '\cA in negated character class range');
-ok("a\cBb" =~ /[\cA-\cC]/, '\cB in character class range');
-ok("a\cCbc" =~ /[^\cA-\cB]/, '\cC in negated character class range');
-ok("a\cAb" =~ /(??{"\cA"})/, '\cA in ??{} pattern');
-
-# perl #28532: optional zero-width match at end of string is ignored
-ok(("abc" =~ /^abc(\z)?/) && defined($1),
-    'optional zero-width match at end of string');
-ok(("abc" =~ /^abc(\z)??/) && !defined($1),
-    'optional zero-width match at end of string');
-
-
-
-{ # TRIE related
-    my @got=();
-    "words"=~/(word|word|word)(?{push @got,$1})s$/;
-    ok(@got==1,"TRIE optimation is working") or warn "# @got";
-    @got=();
-    "words"=~/(word|word|word)(?{push @got,$1})s$/i;
-    ok(@got==1,"TRIEF optimisation is working") or warn "# @got";
-
-    my @nums=map {int rand 1000} 1..100;
-    my $re="(".(join "|",@nums).")";
-    $re=qr/\b$re\b/;
-
-    foreach (@nums) {
-        ok($_=~/$re/,"Trie nums");
-    }
-    $_=join " ", @nums;
-    @got=();
-    push @got,$1 while /$re/g;
-
-    my %count;
-    $count{$_}++ for @got;
-    my $ok=1;
-    for (@nums) {
-        $ok=0 if --$count{$_}<0;
-    }
-    ok($ok,"Trie min count matches");
-}
 
+    {
+        local $BugId = '45605';
+        # [perl #45605] Regexp failure with utf8-flagged and byte-flagged string
 
-# TRIE related
-# LATIN SMALL/CAPITAL LETTER A WITH MACRON
-ok(("foba  \x{101}foo" =~ qr/(foo|\x{100}foo|bar)/i) && $1 eq "\x{101}foo",
-   "TRIEF + LATIN SMALL/CAPITAL LETTER A WITH MACRON");
+        my $utf_8 = "\xd6schel";
+        utf8::upgrade ($utf_8);
+        $utf_8 =~ m {(\xd6|&Ouml;)schel};
+        iseq $1, "\xd6", "Upgrade error";
+    }
 
-# LATIN SMALL/CAPITAL LETTER A WITH RING BELOW
-ok(("foba  \x{1E01}foo" =~ qr/(foo|\x{1E00}foo|bar)/i) && $1 eq "\x{1E01}foo",
-   "TRIEF + LATIN SMALL/CAPITAL LETTER A WITH RING BELOW");
+    {
+# more TRIE/AHOCORASICK problems with mixed utf8 / latin-1 and case folding
+	for my $chr (160 .. 255) {
+	    my $chr_byte = chr($chr);
+	    my $chr_utf8 = chr($chr); utf8::upgrade($chr_utf8);
+	    my $rx = qr{$chr_byte|X}i;
+	    ok($chr_utf8 =~ $rx, "utf8/latin, codepoint $chr");
+	}
+    }
 
-# DESERET SMALL/CAPITAL LETTER LONG I
-ok(("foba  \x{10428}foo" =~ qr/(foo|\x{10400}foo|bar)/i) &&  $1 eq "\x{10428}foo",
-   "TRIEF + DESERET SMALL/CAPITAL LETTER LONG I");
+    {
+        # Regardless of utf8ness any character matches itself when 
+        # doing a case insensitive match. See also [perl #36207] 
+        local $BugId = '36207';
+        for my $o (0 .. 255) {
+            my @ch = (chr ($o), chr ($o));
+            utf8::upgrade ($ch [1]);
+            for my $u_str (0, 1) {
+                for my $u_pat (0, 1) {
+                    ok $ch [$u_str] =~ /\Q$ch[$u_pat]\E/i,
+                    "\$c =~ /\$c/i : chr ($o) : u_str = $u_str u_pat = $u_pat";
+                    ok $ch [$u_str] =~ /\Q$ch[$u_pat]\E|xyz/i,
+                    "\$c=~/\$c|xyz/i : chr($o) : u_str = $u_str u_pat = $u_pat";
+                }
+            }
+        }
+    }
 
-# LATIN SMALL/CAPITAL LETTER A WITH RING BELOW + 'X'
-ok(("foba  \x{1E01}xfoo" =~ qr/(foo|\x{1E00}Xfoo|bar)/i) &&  $1 eq "\x{1E01}xfoo",
-   "TRIEF + LATIN SMALL/CAPITAL LETTER A WITH RING BELOW + 'X'");
 
-{# TRIE related
+    {
+        our $a = 3; "" =~ /(??{ $a })/;
+        our $b = $a;
+        iseq $b, $a, "Copy of scalar used for postponed subexpression";
+    }
 
-use charnames ':full';
 
-$s="\N{LATIN SMALL LETTER SHARP S}";
-ok(("foba  ba$s" =~ qr/(foo|Ba$s|bar)/i)
-    &&  $1 eq "ba$s",
-   "TRIEF + LATIN SMALL LETTER SHARP S =~ ss");
-ok(("foba  ba$s" =~ qr/(Ba$s|foo|bar)/i)
-    &&  $1 eq "ba$s",
-   "TRIEF + LATIN SMALL LETTER SHARP S =~ ss");
-ok(("foba  ba$s" =~ qr/(foo|bar|Ba$s)/i)
-    &&  $1 eq "ba$s",
-   "TRIEF + LATIN SMALL LETTER SHARP S =~ ss");
+    {
+         local $BugId   = '49190';
+         local $Message = '$REGMARK in replacement';
+         our $REGMARK;
+         my $_ = "A";
+         ok s/(*:B)A/$REGMARK/;
+         iseq $_, "B";
+         $_ = "CCCCBAA";
+         ok s/(*:X)A+|(*:Y)B+|(*:Z)C+/$REGMARK/g;
+         iseq $_, "ZYX";
+    }
 
-ok(("foba  ba$s" =~ qr/(foo|Bass|bar)/i)
-    &&  $1 eq "ba$s",
-   "TRIEF + LATIN SMALL LETTER SHARP S =~ ss");
 
-ok(("foba  ba$s" =~ qr/(foo|BaSS|bar)/i)
-    &&  $1 eq "ba$s",
-   "TRIEF + LATIN SMALL LETTER SHARP S =~ SS");
-}
+    {
+        our @ctl_n = ();
+        our @plus = ();
+        our $nested_tags;
+        $nested_tags = qr{
+            <
+               (\w+)
+               (?{
+                       push @ctl_n,$^N;
+                       push @plus,$+;
+               })
+            >
+            (??{$nested_tags})*
+            </\s* \w+ \s*>
+        }x;
+
+        my $match = '<bla><blubb></blubb></bla>' =~ m/^$nested_tags$/;
+        ok $match, 'nested construct matches';
+        iseq "@ctl_n", "bla blubb", '$^N inside of (?{}) works as expected';
+        iseq "@plus",  "bla blubb", '$+  inside of (?{}) works as expected';
+    }
 
 
+    {
+        local $BugId   = '52658';
+        local $Message = 'Substitution evaluation in list context';
+        my $reg = '../xxx/';
+        my @te  = ($reg =~ m{^(/?(?:\.\./)*)},
+                   $reg =~ s/(x)/'b'/eg > 1 ? '##' : '++');
+        iseq $reg, '../bbb/';
+        iseq $te [0], '../';
+    }
 
-{
-    my @normal=qw(these are some normal words);
-    my $psycho=join "|",@normal,map chr $_,255..20000;
-    ok(('these'=~/($psycho)/) && $1 eq 'these','Pyscho');
-}
+	# This currently has to come before any "use encoding" in this file.
+    {
+        local $Message;
+        local $BugId   = '59342';
+        must_warn 'qr/\400/', '^Use of octal value above 377';
+    }
 
-# [perl #36207] mixed utf8 / latin-1 and case folding
 
-{
-    my $utf8 = "\xe9\x{100}"; chop $utf8;
-    my $latin1 = "\xe9";
+    SKIP: {
+        # XXX: This set of tests is essentially broken, POSIX character classes
+        # should not have differing definitions under Unicode. 
+        # There are property names for that.
+        skip "Tests assume ASCII", 4 unless $IS_ASCII;
 
-    ok($utf8 =~ /\xe9/i, "utf8/latin");
-    ok($utf8 =~ /$latin1/i, "utf8/latin runtime");
-    ok($utf8 =~ /(abc|\xe9)/i, "utf8/latin trie");
-    ok($utf8 =~ /(abc|$latin1)/i, "utf8/latin trie runtime");
+        my @notIsPunct = grep {/[[:punct:]]/ and not /\p{IsPunct}/}
+                                map {chr} 0x20 .. 0x7f;
+        iseq join ('', @notIsPunct), '$+<=>^`|~',
+            '[:punct:] disagress with IsPunct on Symbols';
 
-    ok("\xe9" =~ /$utf8/i, "# TODO latin/utf8");
-    ok("\xe9" =~ /(abc|$utf8)/i, "# latin/utf8 trie");
-    ok($latin1 =~ /$utf8/i, "# TODO latin/utf8 runtime");
-    ok($latin1 =~ /(abc|$utf8)/i, "# latin/utf8 trie runtime");
-}
+        my @isPrint = grep {not /[[:print:]]/ and /\p{IsPrint}/}
+                            map {chr} 0 .. 0x1f, 0x7f .. 0x9f;
+        iseq join ('', @isPrint), "\x09\x0a\x0b\x0c\x0d\x85",
+            'IsPrint disagrees with [:print:] on control characters';
 
-# [perl #37038] Global regular matches generate invalid pointers
+        my @isPunct = grep {/[[:punct:]]/ != /\p{IsPunct}/}
+                            map {chr} 0x80 .. 0xff;
+        iseq join ('', @isPunct), "\xa1\xab\xb7\xbb\xbf",	# ¡ « · » ¿
+            'IsPunct disagrees with [:punct:] outside ASCII';
 
-{
-    my $s = "abcd";
-    $s =~ /(..)(..)/g;
-    $s = $1;
-    $s = $2;
-    ok($s eq 'cd',
-       "# assigning to original string should not corrupt match vars");
-}
+        my @isPunctLatin1 = eval q {
+            use encoding 'latin1';
+            grep {/[[:punct:]]/ != /\p{IsPunct}/} map {chr} 0x80 .. 0xff;
+        };
+        skip "Eval failed ($@)", 1 if $@;
+        skip "PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS set to 0", 1
+              if $ENV {REAL_POSIX_CC};
+        iseq join ('', @isPunctLatin1), '', 
+            'IsPunct agrees with [:punct:] with explicit Latin1';
+    } 
 
-{
-    package wooosh;
-    sub gloople {
-      "!";
-    }
-    package main;
-    
-    my $aeek = bless {}, 'wooosh';
-    eval {$aeek->gloople() =~ /(.)/g;};
-    ok($@ eq "", "//g match against return value of sub") or print "# $@\n";
-}
 
-{
-    sub gloople {
-      "!";
+    {
+        local $BugId =  '60034';
+        my $a = "xyzt" x 8192;
+        ok $a =~ /\A(?>[a-z])*\z/,
+                '(?>) does not cause wrongness on long string';
+        my $b = $a . chr 256;
+        chop $b;
+        {
+            iseq $a, $b;
+        }
+        ok $b =~ /\A(?>[a-z])*\z/,
+           '(?>) does not cause wrongness on long string with UTF-8';
     }
-    eval {gloople() =~ /(.)/g;};
-    ok($@ eq "", "# 26410 didn't affect sub calls for some reason")
-	or print "# $@\n";
-}
-
-{
-    package lv;
-    $var = "abc";
-    sub variable : lvalue { $var }
 
-    package main;
-    my $o = bless [], "lv";
-    my $f = "";
-    eval { for (1..2) { $f .= $1 if $o->variable =~ /(.)/g } };
-    ok($f eq "ab", "pos retained between calls # TODO") or print "# $@\n";
-}
 
-{
-    $var = "abc";
-    sub variable : lvalue { $var }
+    #
+    # Keep the following tests last -- they may crash perl
+    #
+    print "# Tests that follow may crash perl\n";
+    {   
+        local $BugId   = '19049/38869';
+        local $Message = 'Pattern in a loop, failure should not ' .
+                         'affect previous success';
+        my @list = (
+            'ab cdef',             # Matches regex
+            ('e' x 40000 ) .'ab c' # Matches not, but 'ab c' matches part of it
+        );
+        my $y;
+        my $x;
+        foreach (@list) {
+            m/ab(.+)cd/i; # The ignore-case seems to be important
+            $y = $1;      # Use $1, which might not be from the last match!
+            $x = substr ($list [0], $- [0], $+ [0] - $- [0]);
+        }
+        iseq $y, ' ';
+        iseq $x, 'ab cd';
+    }
 
-    my $f = "";
-    eval { for (1..2) { $f .= $1 if variable() =~ /(.)/g } };
-    ok($f eq "ab", "pos retained between calls # TODO") or print "# $@\n";
-}
 
-# [perl #37836] Simple Regex causes SEGV when run on specific data
-if ($ordA == 193) {
-    print "ok $test # Skip: in EBCDIC\n"; $test++;
-} else {
-    no warnings 'utf8';
-    $_ = pack('U0C2', 0xa2, 0xf8); # ill-formed UTF-8
-    my $ret = 0;
-    eval { $ret = s/[\0]+//g };
-    ok($ret == 0, "ill-formed UTF-8 doesn't match NUL in class");
-}
+    {
+        local $BugId = '24274';
 
-{ # [perl #38293] chr(65535) should be allowed in regexes
-    no warnings 'utf8'; # to allow non-characters
-    my($c, $r, $s);
+        ok (("a" x (2 ** 15 - 10)) =~ /^()(a|bb)*$/, "Recursive stack cracker");
+        ok ((q(a)x 100) =~ /^(??{'(.)'x 100})/, 
+            "Regexp /^(??{'(.)'x 100})/ crashes older perls");
+    }
 
-    $c = chr 0xffff;
-    $c =~ s/$c//g;
-    ok($c eq "", "U+FFFF, parsed as atom");
 
-    $c = chr 0xffff;
-    $r = "\\$c";
-    $c =~ s/$r//g;
-    ok($c eq "", "U+FFFF backslashed, parsed as atom");
+    {
+        eval '/\k/';
+        ok $@ =~ /\QSequence \k... not terminated in regex;\E/,
+           'Lone \k not allowed';
+    }
 
-    $c = chr 0xffff;
-    $c =~ s/[$c]//g;
-    ok($c eq "", "U+FFFF, parsed in class");
 
-    $c = chr 0xffff;
-    $r = "[\\$c]";
-    $c =~ s/$r//g;
-    ok($c eq "", "U+FFFF backslashed, parsed in class");
+    {
+        local $Message = "Substitution with lookahead (possible segv)";
+        $_ = "ns1ns1ns1";
+        s/ns(?=\d)/ns_/g;
+        iseq $_, "ns_1ns_1ns_1";
+        $_ = "ns1";
+        s/ns(?=\d)/ns_/;
+        iseq $_, "ns_1";
+        $_ = "123";
+        s/(?=\d+)|(?<=\d)/!Bang!/g;
+        iseq $_, "!Bang!1!Bang!2!Bang!3!Bang!";
+    }
 
-    $s = "A\x{ffff}B";
-    $s =~ s/\x{ffff}//i;
-    ok($s eq "AB", "U+FFFF, EXACTF");
 
-    $s = "\x{ffff}A";
-    $s =~ s/\bA//;
-    ok($s eq "\x{ffff}", "U+FFFF, BOUND");
+    {
+        # [perl #45337] utf8 + "[a]a{2}" + /$.../ = panic: sv_len_utf8 cache
+        local $BugId = '45337';
+        local ${^UTF8CACHE} = -1;
+        local $Message = "Shouldn't panic";
+        my $s = "[a]a{2}";
+        utf8::upgrade $s;
+        ok "aaa" =~ /$s/;
+    }
+    {
+        local $BugId = '57042';
+	local $Message = "Check if tree logic breaks \$^R";
+	my $cond_re = qr/\s*
+	    \s* (?:
+		   \( \s* A  (?{1})
+		 | \( \s* B  (?{2})
+	       )
+	   /x;
+	my @res;
+	for my $line ("(A)","(B)") {
+	   if ($line =~ m/$cond_re/) {
+	       push @res, $^R ? "#$^R" : "UNDEF";
+	   }
+	}
+	iseq "@res","#1 #2";
+    }
+    {
+	no warnings 'closure';
+	my $re = qr/A(??{"1"})/;
+	ok "A1B" =~ m/^((??{ $re }))((??{"B"}))$/;
+	ok $1 eq "A1";
+	ok $2 eq "B";
+    }
 
-    $s = "\x{ffff}!";
-    $s =~ s/\B!//;
-    ok($s eq "\x{ffff}", "U+FFFF, NBOUND");
-} # non-characters end
 
+    {
+        use re 'eval';
+        local $Message = 'Test if $^N and $+ work in (?{{})';
+        our @ctl_n = ();
+        our @plus = ();
+        our $nested_tags;
+        $nested_tags = qr{
+            <
+               ((\w)+)
+               (?{
+                       push @ctl_n, (defined $^N ? $^N : "undef");
+                       push @plus, (defined $+ ? $+ : "undef");
+               })
+            >
+            (??{$nested_tags})*
+            </\s* \w+ \s*>
+        }x;
+
+
+        my $c = 0;
+        for my $test (
+            [ 1, qr#^$nested_tags$#, "bla blubb bla", "a b a" ],
+            [ 1, qr#^($nested_tags)$#, "bla blubb <bla><blubb></blubb></bla>", "a b a" ],
+            [ 1, qr#^(|)$nested_tags$#, "bla blubb bla", "a b a" ],
+            [ 1, qr#^(?:|)$nested_tags$#, "bla blubb bla", "a b a" ],
+            [ 1, qr#^<(bl|bla)>$nested_tags<(/\1)>$#, "blubb /bla", "b /bla" ],
+            [ 1, qr#(??{"(|)"})$nested_tags$#, "bla blubb bla", "a b a" ],
+            [ 1, qr#^(??{"(bla|)"})$nested_tags$#, "bla blubb bla", "a b a" ],
+            [ 1, qr#^(??{"(|)"})(??{$nested_tags})$#, "bla blubb undef", "a b undef" ],
+            [ 1, qr#^(??{"(?:|)"})$nested_tags$#, "bla blubb bla", "a b a" ],
+            [ 1, qr#^((??{"(?:bla|)"}))((??{$nested_tags}))$#, "bla blubb <bla><blubb></blubb></bla>", "a b <bla><blubb></blubb></bla>" ],
+            [ 1, qr#^((??{"(?!)?"}))((??{$nested_tags}))$#, "bla blubb <bla><blubb></blubb></bla>", "a b <bla><blubb></blubb></bla>" ],
+            [ 1, qr#^((??{"(?:|<(/?bla)>)"}))((??{$nested_tags}))\1$#, "bla blubb <bla><blubb></blubb></bla>", "a b <bla><blubb></blubb></bla>" ],
+            [ 0, qr#^((??{"(?!)"}))?((??{$nested_tags}))(?!)$#, "bla blubb undef", "a b undef" ],
+
+        ) {
+            $c++;
+            @ctl_n = ();
+            @plus = ();
+            my $match = (("<bla><blubb></blubb></bla>" =~ $test->[1]) ? 1 : 0);
+            push @ctl_n, (defined $^N ? $^N : "undef");
+            push @plus, (defined $+ ? $+ : "undef");
+            ok($test->[0] == $match, "match $c");
+            if ($test->[0] != $match) {
+              # unset @ctl_n and @plus
+              @ctl_n = @plus = ();
+            }
+            iseq("@ctl_n", $test->[2], "ctl_n $c");
+            iseq("@plus", $test->[3], "plus $c");
+        }
+    }
 
-# Keep the following test last -- it may crash perl
+    {
+        use re 'eval';
+        local $BugId = '56194';
+
+	our $f;
+	local $f;
+	$f = sub {
+            defined $_[0] ? $_[0] : "undef";
+        };
+
+        ok("123" =~ m/^(\d)(((??{1 + $^N})))+$/);
+
+        our @ctl_n;
+        our @plus;
+
+        my $re  = qr#(1)((??{ push @ctl_n, $f->($^N); push @plus, $f->($+); $^N + 1}))*(?{$^N})#;
+        my $re2 = qr#(1)((??{ push @ctl_n, $f->($^N); push @plus, $f->($+); $^N + 1}))*(?{$^N})(|a(b)c|def)(??{"$^R"})#;
+        my $re3 = qr#(1)((??{ push @ctl_n, $f->($^N); push @plus, $f->($+); $^N + 1})){2}(?{$^N})(|a(b)c|def)(??{"$^R"})#;
+        our $re5;
+        local $re5 = qr#(1)((??{ push @ctl_n, $f->($^N); push @plus, $f->($+); $^N + 1})){2}(?{$^N})#;
+        my $re6 = qr#(??{ push @ctl_n, $f->($^N); push @plus, $f->($+); $^N + 1})#;
+        my $re7 = qr#(??{ push @ctl_n, $f->($^N); push @plus, $f->($+); $^N + 1})#;
+        my $re8 = qr/(\d+)/;
+        my $c = 0;
+        for my $test (
+             [
+                  "1233",
+                  qr#^(1)((??{ push @ctl_n, $f->($^N); push @plus, $f->($+); $^N + 1}))+(??{$^N})$#,
+                  "1 2 3 3",
+                  "1 2 3 3",
+                  "\$1 = 1, \$2 = 3, \$3 = undef, \$4 = undef, \$5 = undef",
+             ],
+             [
+                  "1233",
+                  qr#^(1)((??{ push @ctl_n, $f->($^N); push @plus, $f->($+); $^N + 1}))+(abc|def|)?(??{$+})$#,
+                  "1 2 3 3",
+                  "1 2 3 3",
+                  "\$1 = 1, \$2 = 3, \$3 = undef, \$4 = undef, \$5 = undef",
+             ],
+             [
+                  "1233",
+                  qr#^(1)((??{ push @ctl_n, $f->($^N); push @plus, $f->($+); $^N + 1}))+(|abc|def)?(??{$+})$#,
+                  "1 2 3 3",
+                  "1 2 3 3",
+                  "\$1 = 1, \$2 = 3, \$3 = undef, \$4 = undef, \$5 = undef",
+             ],
+             [
+                  "1233",
+                  qr#^(1)((??{ push @ctl_n, $f->($^N); push @plus, $f->($+); $^N + 1}))+(abc|def|)?(??{$^N})$#,
+                  "1 2 3 3",
+                  "1 2 3 3",
+                  "\$1 = 1, \$2 = 3, \$3 = undef, \$4 = undef, \$5 = undef",
+             ],
+             [
+                  "1233",
+                  qr#^(1)((??{ push @ctl_n, $f->($^N); push @plus, $f->($+); $^N + 1}))+(|abc|def)?(??{$^N})$#,
+                  "1 2 3 3",
+                  "1 2 3 3",
+                  "\$1 = 1, \$2 = 3, \$3 = undef, \$4 = undef, \$5 = undef",
+              ],
+              [
+                  "123abc3",
+                   qr#^($re)(|a(b)c|def)(??{$^R})$#,
+                   "1 2 3 abc",
+                   "1 2 3 b",
+                   "\$1 = 123, \$2 = 1, \$3 = 3, \$4 = abc, \$5 = b",
+              ],
+              [
+                  "123abc3",
+                   qr#^($re2)$#,
+                   "1 2 3 123abc3",
+                   "1 2 3 b",
+                   "\$1 = 123abc3, \$2 = 1, \$3 = 3, \$4 = abc, \$5 = b",
+              ],
+              [
+                  "123abc3",
+                   qr#^($re3)$#,
+                   "1 2 123abc3",
+                   "1 2 b",
+                   "\$1 = 123abc3, \$2 = 1, \$3 = 3, \$4 = abc, \$5 = b",
+              ],
+              [
+                  "123abc3",
+                   qr#^(??{$re5})(|abc|def)(??{"$^R"})$#,
+                   "1 2 abc",
+                   "1 2 abc",
+                   "\$1 = abc, \$2 = undef, \$3 = undef, \$4 = undef, \$5 = undef",
+              ],
+              [
+                  "123abc3",
+                   qr#^(??{$re5})(|a(b)c|def)(??{"$^R"})$#,
+                   "1 2 abc",
+                   "1 2 b",
+                   "\$1 = abc, \$2 = b, \$3 = undef, \$4 = undef, \$5 = undef",
+              ],
+              [
+                  "1234",
+                   qr#^((\d+)((??{push @ctl_n, $f->($^N); push @plus, $f->($+);$^N + 1}))((??{push @ctl_n, $f->($^N); push @plus, $f->($+);$^N + 1}))((??{push @ctl_n, $f->($^N); push @plus, $f->($+);$^N + 1})))$#,
+                   "1234 123 12 1 2 3 1234",
+                   "1234 123 12 1 2 3 4",
+                   "\$1 = 1234, \$2 = 1, \$3 = 2, \$4 = 3, \$5 = 4",
+              ],
+              [
+                   "1234556",
+                   qr#^(\d+)($re6)($re6)($re6)$re6(($re6)$re6)$#,
+                   "1234556 123455 12345 1234 123 12 1 2 3 4 4 5 56",
+                   "1234556 123455 12345 1234 123 12 1 2 3 4 4 5 5",
+                   "\$1 = 1, \$2 = 2, \$3 = 3, \$4 = 4, \$5 = 56",
+              ],
+              [
+                  "12345562",
+                   qr#^((??{$re8}))($re7)($re7)($re7)$re7($re7)($re7(\2))$#,
+                   "12345562 1234556 123455 12345 1234 123 12 1 2 3 4 4 5 62",
+                   "12345562 1234556 123455 12345 1234 123 12 1 2 3 4 4 5 2",
+                   "\$1 = 1, \$2 = 2, \$3 = 3, \$4 = 4, \$5 = 5",
+              ],
+        ) {
+            $c++;
+            @ctl_n = ();
+            @plus = ();
+            undef $^R;
+            my $match = $test->[0] =~ $test->[1];
+            my $str = join(", ", '$1 = '.$f->($1), '$2 = '.$f->($2), '$3 = '.$f->($3), '$4 = '.$f->($4),'$5 = '.$f->($5));
+            push @ctl_n, $f->($^N);
+            push @plus, $f->($+);
+            ok($match, "match $c");
+            if (not $match) {
+                # unset $str, @ctl_n and @plus
+                $str = "";
+                @ctl_n = @plus = ();
+            }
+            iseq("@ctl_n", $test->[2], "ctl_n $c");
+            iseq("@plus", $test->[3], "plus $c");
+            iseq($str, $test->[4], "str $c");
+        }
+        SKIP: {
+            if ($] le '5.010') {
+                skip "test segfaults on perl < 5.10", 4;
+            }
+
+            @ctl_n = ();
+            @plus = ();
+
+            our $re4;
+            local $re4 = qr#(1)((??{push @ctl_n, $f->($^N); push @plus, $f->($+);$^N + 1})){2}(?{$^N})(|abc|def)(??{"$^R"})#;
+            undef $^R;
+            my $match = "123abc3" =~ m/^(??{$re4})$/;
+            my $str = join(", ", '$1 = '.$f->($1), '$2 = '.$f->($2), '$3 = '.$f->($3), '$4 = '.$f->($4),'$5 = '.$f->($5),'$^R = '.$f->($^R));
+            push @ctl_n, $f->($^N);
+            push @plus, $f->($+);
+            ok($match);
+            if (not $match) {
+                # unset $str
+                @ctl_n = ();
+                @plus = ();
+                $str = "";
+            }
+            iseq("@ctl_n", "1 2 undef");
+            iseq("@plus", "1 2 undef");
+            iseq($str, "\$1 = undef, \$2 = undef, \$3 = undef, \$4 = undef, \$5 = undef, \$^R = undef");
+       }
+    }
+    #
+    # This should be the last test.
+    #
+    iseq $test + 1, $EXPECTED_TESTS, "Got the right number of tests!";
 
-ok(("a" x (2**15 - 10)) =~ /^()(a|bb)*$/, "Recursive stack cracker: #24274")
-    or print "# Unexpected outcome: should pass or crash perl\n";
+} # End of sub run_tests
 
-# last test 1200
+1;