#
# Tests derived from Japhs.
#
+# These test use obscure features of Perl, or surprising combinations
+# of features. The tests were added because in the past, they have
+# exposed several bugs in Perl.
+#
+# Some of these tests may actually (mis)use bugs or use undefined behaviour.
+# These tests are still useful - behavioural changes or bugfixes will be
+# noted, and a remark can be put in the documentation. (Don't forget to
+# disable the test!)
+#
+# Getting everything to run well on the myriad of platforms Perl runs on
+# is unfortunately not a trivial task.
+#
+# WARNING: these tests are obfuscated. Do not get frustrated.
+# Ask Abigail <abigail@foad.org>, or use the Deparse or Concise
+# modules (the former parses Perl to Perl, the latter shows the
+# op syntax tree) like this:
+# ./perl -Ilib -MO=Deparse foo.pl
+# ./perl -Ilib -MO=Concise foo.pl
+#
BEGIN {
if (ord("A") == 193) {
undef &skip;
}
+skip_all "Unhappy on MacOS" if $^O eq 'MacOS';
+
#
# ./test.pl does real evilness by jumping to a label.
# This function copies the skip from ./test, omitting the goto.
{
my $datafile = "datatmp000";
1 while -f ++ $datafile;
- END {unlink_all $datafile}
+ END {unlink_all $datafile if $datafile}
open MY_DATA, "> $datafile" or die "Failed to open $datafile: $!";
print MY_DATA << " --";
{
my $progfile = "progtmp000";
1 while -f ++ $progfile;
- END {unlink_all $progfile}
+ END {unlink_all $progfile if $progfile}
my @programs = (<< ' --', << ' --');
-#!./perl -- # No trailing newline after the last line!
+#!./perl
BEGIN{$|=$SIG{__WARN__}=sub{$_=$_[0];y-_- -;print/(.)"$/;seek _,-open(_
,"+<$0"),2;truncate _,tell _;close _;exec$0}}//rekcaH_lreP_rehtona_tsuJ
--
-#!./perl -- # Remove trailing newline!
+#!./perl
BEGIN{$SIG{__WARN__}=sub{$_=pop;y-_- -;print/".*(.)"/;
truncate$0,-1+-s$0;exec$0;}}//rekcaH_lreP_rehtona_tsuJ
--