clean up type type searching

diff --git a/lib/MooseX/Types/TypeDecorator.pm b/lib/MooseX/Types/TypeDecorator.pm
index fa97bb7..6f02813 100644 (file)
--- a/lib/MooseX/Types/TypeDecorator.pm
+++ b/lib/MooseX/Types/TypeDecorator.pm
@@ -173,13 +173,16 @@ sub _try_delegate {
     my ($self, $method, @args) = @_;
     my $tc = $self->__type_constraint;
     my $class;
-    my $search_tc = $tc;
-    while ($search_tc->is_subtype_of('Object')) {
-        if ($search_tc->isa('Moose::Meta::TypeConstraint::Class')) {
-            $class = $search_tc->class;
-            last;
+    if ($tc->can('is_subtype_of')) { # Union can't
+        my $search_tc = $tc;
+        while (1) {
+            if ($search_tc->isa('Moose::Meta::TypeConstraint::Class')) {
+                $class = $search_tc->class;
+                last;
+            }
+            $search_tc = $search_tc->parent;
+            last unless $search_tc->is_subtype_of('Object');
         }
-        $search_tc = $search_tc->parent;
     }
         
     my $inv = (