3 files changed, 74 insertions, 0 deletions
diff --git a/ChangeLog b/ChangeLog
index 424a6a126f..f63766436e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,13 @@
+Wed Dec 12 01:47:02 2012  Shugo Maeda  <shugo@ruby-lang.org>
+
+	* eval.c (rb_using_refinement): make the method table of an iclass
+	  for a refinement that of the refinement, not that of the origin of
+	  the refinement, which is set by rb_include_class_new().  This
+	  change is needed to make module prepend into a refinement work
+	  properly.
+
+	* test/ruby/test_refinement.rb: related test.
+
 Wed Dec 12 01:05:04 2012  NARUSE, Yui  <naruse@ruby-lang.org>
 
 	* tool/make-snapshot: add --disable-rubygem to both MINIRUBY and RUBY.
diff --git a/eval.c b/eval.c
index c32b974363..f6a7b5dfb1 100644
--- a/eval.c
+++ b/eval.c
@@ -1078,6 +1078,7 @@ rb_using_refinement(NODE *cref, VALUE klass, VALUE module)
     FL_SET(module, RMODULE_IS_OVERLAID);
     c = iclass = rb_include_class_new(module, superclass);
     RCLASS_REFINED_CLASS(c) = klass;
+    RCLASS_M_TBL(c) = RCLASS_M_TBL(module);
     module = RCLASS_SUPER(module);
     while (module && module != klass) {
 	FL_SET(module, RMODULE_IS_OVERLAID);
diff --git a/test/ruby/test_refinement.rb b/test/ruby/test_refinement.rb
index d572413def..8b4a4fc4e9 100644
--- a/test/ruby/test_refinement.rb
+++ b/test/ruby/test_refinement.rb
@@ -692,6 +692,69 @@ class TestRefinement < Test::Unit::TestCase
                  IncludeIntoRefinement::User.invoke_baz_on(x))
   end
 
+  module PrependIntoRefinement
+    class C
+      def bar
+        return "C#bar"
+      end
+
+      def baz
+        return "C#baz"
+      end
+    end
+
+    module Mixin
+      def foo
+        return "Mixin#foo"
+      end
+
+      def bar
+        return super << " Mixin#bar"
+      end
+
+      def baz
+        return super << " Mixin#baz"
+      end
+    end
+
+    module M
+      refine C do
+        prepend Mixin
+
+        def baz
+          return super << " M#baz"
+        end
+      end
+    end
+  end
+
+  eval <<-EOF, TOPLEVEL_BINDING
+    using TestRefinement::PrependIntoRefinement::M
+
+    module TestRefinement::PrependIntoRefinement::User
+      def self.invoke_foo_on(x)
+        x.foo
+      end
+
+      def self.invoke_bar_on(x)
+        x.bar
+      end
+
+      def self.invoke_baz_on(x)
+        x.baz
+      end
+    end
+  EOF
+
+  def test_prepend_into_refinement
+    x = PrependIntoRefinement::C.new
+    assert_equal("Mixin#foo", PrependIntoRefinement::User.invoke_foo_on(x))
+    assert_equal("C#bar Mixin#bar",
+                 PrependIntoRefinement::User.invoke_bar_on(x))
+    assert_equal("C#baz M#baz Mixin#baz",
+                 PrependIntoRefinement::User.invoke_baz_on(x))
+  end
+
   private
 
   def eval_using(mod, s)