Issue #6478 has been updated by nobu (Nobuyoshi Nakada). =begin "Method transplanting" is introduced into 2.0, so you can write: class Foo < BasicObject include ::Module.new { [:dup, :initialize_dup, :initialize_copy].each {|m| define_method(m, ::Kernel.instance_method(m)) } } end I expect someone would make such method in (({Module})) as an external library. =end ---------------------------------------- Feature #6478: BasicObject#__class__ https://bugs.ruby-lang.org/issues/6478#change-31593 Author: trans (Thomas Sawyer) Status: Feedback Priority: Normal Assignee: matz (Yukihiro Matsumoto) Category: core Target version: next minor How else is one supposed to get the class of a subclass of BasicObject? -- http://bugs.ruby-lang.org/