forwardable.rb: full qualify names

* lib/forwardable.rb (def_instance_delegator, def_single_delegator):
  match backtraces against ::Forwardable in case the target class
  is a subclass of BasicObject and does not include Kernel.
  [ruby-core:71176] [Bug #11616]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52259 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 13 insertions, 0 deletions

diff --git a/test/test_forwardable.rb b/test/test_forwardable.rb
index 9b26019893..6dd015e5a4 100644
--- a/test/test_forwardable.rb
+++ b/test/test_forwardable.rb
@@ -110,6 +110,19 @@ class TestForwardable < Test::Unit::TestCase
     assert_not_match(/\/forwardable\.rb/, e.backtrace[0])
   end
 
+  class Foo2 < BasicObject
+    extend ::Forwardable
+
+    def_delegator :bar, :baz
+  end
+
+  def test_basicobject_subclass
+    bug11616 = '[ruby-core:71176] [Bug #11616]'
+    assert_raise_with_message(NameError, /`bar'/, bug11616) {
+      Foo2.new.baz
+    }
+  end
+
   private
 
   def forwardable_class(&block)