Fix from Dave Mitchell to the recent from lib/Devel/SelfStubber.t:

Variable "$nested" is not available at (re_eval 4) line 2, <DATA> line 8.
which was on old bug unearthed by the change #20559.
Basically, qr// + (??{$lexical}) combination is very, VERY broken.
Workaround is not to use lexicals.
p4raw-link: @20559 on //depot/perl: 2740392c45d51e34cd904b51afcc00544a78cf82

p4raw-id: //depot/perl@20578

diff --git a/lib/SelfLoader.pm b/lib/SelfLoader.pm
index 59defe0..3b810dd 100644 (file)
--- a/lib/SelfLoader.pm
+++ b/lib/SelfLoader.pm
@@ -10,10 +10,12 @@ $DEBUG = 0;
 my %Cache;      # private cache for all SelfLoader's client packages
 
 # allow checking for valid ': attrlist' attachments
-my $nested;
+# (we use 'our' rather than 'my' here, due to the rather complex and buggy
+# behaviour of lexicals with qr// and (??{$lex}) )
+our $nested;
 $nested = qr{ \( (?: (?> [^()]+ ) | (??{ $nested }) )* \) }x;
-my $one_attr = qr{ (?> (?! \d) \w+ (?:$nested)? ) (?:\s*\:\s*|\s+(?!\:)) }x;
-my $attr_list = qr{ \s* : \s* (?: $one_attr )* }x;
+our $one_attr = qr{ (?> (?! \d) \w+ (?:$nested)? ) (?:\s*\:\s*|\s+(?!\:)) }x;
+our $attr_list = qr{ \s* : \s* (?: $one_attr )* }x;
 
 sub croak { require Carp; goto &Carp::croak }