From: Peter Rabbitson <ribasushi@cpan.org>
Date: Thu, 16 Jun 2016 22:21:23 +0000 (+0200)
Subject: Remove useless eval in the leaktracer on 5.8.3+
X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?p=dbsrgits%2FDBIx-Class.git;a=commitdiff_plain;h=7bba735de0eb5d431bb3b36e6aec4b19370f9158

Remove useless eval in the leaktracer on 5.8.3+

As a bonus fix a subtle bug where the very first ref encountered was never
traced, as the postincrement caused its slot to be deleted - ARGH!
---

diff --git a/lib/DBIx/Class/_Util.pm b/lib/DBIx/Class/_Util.pm
index f6e04fe..d077124 100644
--- a/lib/DBIx/Class/_Util.pm
+++ b/lib/DBIx/Class/_Util.pm
@@ -23,6 +23,9 @@ BEGIN {
 
     BROKEN_GOTO => ( "$]" < 5.008003 ) ? 1 : 0,
 
+    # perl -MScalar::Util=weaken -e 'weaken( $hash{key} = \"value" )'
+    BROKEN_WEAK_SCALARREF_VALUES => ( "$]" < 5.008003 ) ? 1 : 0,
+
     HAS_ITHREADS => $Config{useithreads} ? 1 : 0,
 
     UNSTABLE_DOLLARAT => ( "$]" < 5.013002 ) ? 1 : 0,
diff --git a/t/lib/DBICTest/Util/LeakTracer.pm b/t/lib/DBICTest/Util/LeakTracer.pm
index 6f1bcb6..8002e69 100644
--- a/t/lib/DBICTest/Util/LeakTracer.pm
+++ b/t/lib/DBICTest/Util/LeakTracer.pm
@@ -48,18 +48,23 @@ sub populate_weakregistry {
       for keys %$reg;
   }
 
+  return $target if (
+    DBIx::Class::_ENV_::BROKEN_WEAK_SCALARREF_VALUES
+      and
+    ref $target eq 'SCALAR'
+  );
+
   if (! defined $weak_registry->{$refaddr}{weakref}) {
+
+    # replace slot entirely
     $weak_registry->{$refaddr} = {
       stacktrace => stacktrace(1),
       weakref => $target,
     };
 
-    # on perl < 5.8.3 sometimes a weaken can throw (can't find RT)
-    # so guard against that unlikely event
-    local $SIG{__DIE__} if $SIG{__DIE__};
-    local $@;
-    eval { weaken( $weak_registry->{$refaddr}{weakref} ); $refs_traced++ }
-      or delete $weak_registry->{$refaddr};
+    weaken( $weak_registry->{$refaddr}{weakref} );
+
+    $refs_traced++;
   }
 
   my $desc = refdesc $target;