object.c: undef Module#prepend_features on Class

* object.c (Init_Object): undef Module#prepend_features on Class, as
  well as Module#append_features.  [Fixes GH-376]
* test_class.rb: Added test for above. And ensure type checking
  on similar methods as module_function.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42541 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 0 deletions

diff --git a/object.c b/object.c
index 965c83cb84..265601c799 100644
--- a/object.c
+++ b/object.c
@@ -3242,6 +3242,7 @@ Init_Object(void)
     rb_define_alloc_func(rb_cClass, rb_class_s_alloc);
     rb_undef_method(rb_cClass, "extend_object");
     rb_undef_method(rb_cClass, "append_features");
+    rb_undef_method(rb_cClass, "prepend_features");
 
     /*
      * Document-class: Data