fix method modifier breakage on 5.10.0

Setting @ISA via the typeglob breaks inheritance on 5.10.0 if the stash
has previously been accessed an then a method called on the class (in
that order!).

Add test nicked from Moo that tickles the bug.

diff --git a/Changes b/Changes
index e87de5f..a82a746 100644 (file)
--- a/Changes
+++ b/Changes
@@ -1,3 +1,5 @@
+  - fix method modifier breakage on 5.10.0
+
 1.002002 - 2012-10-28
   - skip t/around-does.t when Class::Method::Modifiers is not installed
     (RT#80310)

diff --git a/lib/Role/Tiny.pm b/lib/Role/Tiny.pm
index 3062e65..253d80a 100644 (file)
--- a/lib/Role/Tiny.pm
+++ b/lib/Role/Tiny.pm
@@ -214,7 +214,11 @@ sub _composable_package_for {
   return $composed_name if $COMPOSED{role}{$composed_name};
   $me->_install_methods($composed_name, $role);
   my $base_name = $composed_name.'::_BASE';
-  *{_getglob("${composed_name}::ISA")} = [ $base_name ];
+  # Not using _getglob, since setting @ISA via the typeglob breaks
+  # inheritance on 5.10.0 if the stash has previously been accessed an
+  # then a method called on the class (in that order!), which
+  # ->_install_methods (with the help of ->_install_does) ends up doing.
+  { no strict 'refs'; @{"${composed_name}::ISA"} = ( $base_name ); }
   my $modifiers = $INFO{$role}{modifiers}||[];
   my @mod_base;
   foreach my $modified (

diff --git a/t/compose-modifiers.t b/t/compose-modifiers.t
new file mode 100644 (file)
index 0000000..1e67ffc
--- /dev/null
+++ b/t/compose-modifiers.t
@@ -0,0 +1,36 @@
+use strictures 1;
+use Test::More;
+
+BEGIN {
+  plan skip_all => "Class::Method::Modifiers not installed"
+    unless eval "use Class::Method::Modifiers; 1";
+}
+
+{
+  package One; use Role::Tiny;
+  around foo => sub { my $orig = shift; (__PACKAGE__, $orig->(@_)) };
+  package Two; use Role::Tiny;
+  around foo => sub { my $orig = shift; (__PACKAGE__, $orig->(@_)) };
+  package Three; use Role::Tiny;
+  around foo => sub { my $orig = shift; (__PACKAGE__, $orig->(@_)) };
+  package Four; use Role::Tiny;
+  around foo => sub { my $orig = shift; (__PACKAGE__, $orig->(@_)) };
+  package Base; sub foo { __PACKAGE__ }
+}
+
+foreach my $combo (
+  [ qw(One Two Three Four) ],
+  [ qw(Two Four Three) ],
+  [ qw(One Two) ]
+) {
+  my $combined = Role::Tiny->create_class_with_roles('Base', @$combo);
+  is_deeply(
+    [ $combined->foo ], [ reverse(@$combo), 'Base' ],
+    "${combined} ok"
+  );
+  my $object = bless({}, 'Base');
+  Role::Tiny->apply_roles_to_object($object, @$combo);
+  is(ref($object), $combined, 'Object reblessed into correct class');
+}
+
+done_testing;