Weaken the $metaclass closed over by the meta method.

This breaks some cycles (notably in anon metaclasses, where it actually
matters).

diff --git a/lib/Class/MOP/Method/Meta.pm b/lib/Class/MOP/Method/Meta.pm
index 980afe7..bc50405 100644 (file)
--- a/lib/Class/MOP/Method/Meta.pm
+++ b/lib/Class/MOP/Method/Meta.pm
@@ -5,7 +5,7 @@ use strict;
 use warnings;
 
 use Carp         'confess';
-use Scalar::Util 'blessed';
+use Scalar::Util 'blessed', 'weaken';
 
 use constant DEBUG_NO_META => $ENV{DEBUG_NO_META} ? 1 : 0;
 
@@ -20,6 +20,8 @@ sub _is_caller_mop_internal {
 sub _generate_meta_method {
     my $method_self = shift;
     my $metaclass   = shift;
+    weaken($metaclass);
+
     sub {
         # this will be compiled out if the env var wasn't set
         if (DEBUG_NO_META) {