require './test.pl';
}
-plan tests => 1;
+plan tests => 11;
eval { for (\2) { $_ = <FH> } };
like($@, 'Modification of a read-only value attempted', '[perl #19566]');
+{
+ open A,"+>a"; $a = 3;
+ is($a .= <A>, 3, '#21628 - $a .= <A> , A eof');
+ close A; $a = 4;
+ is($a .= <A>, 4, '#21628 - $a .= <A> , A closed');
+ unlink "a";
+}
+
+# 82 is chosen to exceed the length for sv_grow in do_readline (80)
+foreach my $k (1, 82) {
+ my $result
+ = runperl (switches => '-l', stdin => '', stderr => 1,
+ prog => "\$x = q(k) x $k; \$a{\$x} = qw(v); \$_ = <> foreach keys %a; print qw(end)",
+ );
+ $result =~ s/\n\z// if $^O eq 'VMS';
+ is ($result, "end", '[perl #21614] for length ' . length('k' x $k));
+}
+
+
+foreach my $k (1, 21) {
+ my $result
+ = runperl (switches => '-l', stdin => ' rules', stderr => 1,
+ prog => "\$x = q(perl) x $k; \$a{\$x} = q(v); foreach (keys %a) {\$_ .= <>; print}",
+ );
+ $result =~ s/\n\z// if $^O eq 'VMS';
+ is ($result, ('perl' x $k) . " rules", 'rcatline to shared sv for length ' . length('perl' x $k));
+}
+
+foreach my $l (1, 82) {
+ my $k = $l;
+ $k = 'k' x $k;
+ my $copy = $k;
+ $k = <DATA>;
+ is ($k, "moo\n", 'catline to COW sv for length ' . length $copy);
+}
+
+
+foreach my $l (1, 21) {
+ my $k = $l;
+ $k = 'perl' x $k;
+ my $perl = $k;
+ $k .= <DATA>;
+ is ($k, "$perl rules\n", 'rcatline to COW sv for length ' . length $perl);
+}
+__DATA__
+moo
+moo
+ rules
+ rules