ko1 fa4e516db9 * method.h: introduce rb_method_definition_t::complemented_count.
* vm_method.c (method_definition_addref_complement): introduced.

  def->alias_count is used to decide warn or do not warn at method
  redefinition. Complented methods should not prevent redefiniton
  warnings.

* vm_method.c (rb_method_definition_release): release def iff
  alias_count == 0 && complemented_count == 0.

* test/ruby/test_module.rb: add a test.




git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52614 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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