fix null m_tbl

* class.c (rb_obj_singleton_methods): m_tbl in prepended class/module
  is NULL.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@36238 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 6 insertions, 0 deletions

diff --git a/test/ruby/test_module.rb b/test/ruby/test_module.rb
index 7f66911e43..aa48e1793c 100644
--- a/test/ruby/test_module.rb
+++ b/test/ruby/test_module.rb
@@ -1284,4 +1284,10 @@ class TestModule < Test::Unit::TestCase
     bug6655 = '[ruby-core:45915]'
     assert_equal(Object.instance_methods, Class.new {prepend Module.new}.instance_methods, bug6655)
   end
+
+  def test_prepend_singleton_methods
+    o = Object.new
+    o.singleton_class.class_eval {prepend Module.new}
+    assert_equal([], o.singleton_methods)
+  end
 end