From: gfx <gfuji@cpan.org>
Date: Thu, 3 Dec 2009 03:17:53 +0000 (+0900)
Subject: Fix a bug that segv caused on 5.6.2 with -traits
X-Git-Tag: 0.40_09~12
X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=commitdiff_plain;h=3bb9e54e87a3e1a353627d470ee22a0a70b33dbf;p=gitmo%2FMouse.git

Fix a bug that segv caused on 5.6.2 with -traits
---

diff --git a/lib/Mouse/PurePerl.pm b/lib/Mouse/PurePerl.pm
index 383c0c8..c0a8e0a 100644
--- a/lib/Mouse/PurePerl.pm
+++ b/lib/Mouse/PurePerl.pm
@@ -18,15 +18,20 @@ sub is_class_loaded {
     return 0 if ref($class) || !defined($class) || !length($class);
 
     # walk the symbol table tree to avoid autovififying
-    # \*{${main::}{"Foo::"}} == \*main::Foo::
+    # \*{${main::}{"Foo::"}{"Bar::"}} == \*main::Foo::Bar::
 
     my $pack = \%::;
     foreach my $part (split('::', $class)) {
-        my $entry = \$pack->{$part . '::'};
+        $part .= '::';
+        return 0 if !exists $pack->{$part};
+
+        my $entry = \$pack->{$part};
         return 0 if ref($entry) ne 'GLOB';
-        $pack = *{$entry}{HASH} or return 0;
+        $pack = *{$entry}{HASH};
     }
 
+    return 0 if !%{$pack};
+
     # check for $VERSION or @ISA
     return 1 if exists $pack->{VERSION}
              && defined *{$pack->{VERSION}}{SCALAR} && defined ${ $pack->{VERSION} };