add test for a define_method wrapper.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@13564 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

bootstraptest/test_knownbug.rb

@@ -13,3 +13,18 @@ assert_finish 1, %q{
   w.write "a"
 }, '[ruby-dev:31866]'
 
+assert_equal 'ok', %q{
+  class Module
+    def define_method2(name, &block)
+      define_method(name, &block)
+    end
+  end
+  class C
+    define_method2(:m) {|x, y| :fail }
+  end
+  begin
+    C.new.m([1,2])
+  rescue ArgumentError
+    :ok
+  end
+}