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+Wed Nov 18 17:08:18 2015 Koichi Sasada <ko1@atdot.net>
+
+ * method.h: introduce the folliwing field and macros.
+
+ * rb_method_definition_t::complemented_count to count shared method
+ entries because of complemented method entries and separate from
+ alias_count.
+
+ Shared `def' only by complemented method entries should not prevent
+ method re-definition warning.
+
+ * METHOD_ENTRY_COMPLEMENTED(me) to represent complemented method entry.
+ * METHOD_ENTRY_COMPLEMENTED_SET(me) to check it as complemented me.
+
+ * vm_insnhelper.c (aliased_callable_method_entry): should also
+ check me->def->complemented_count.
+
+ * vm_method.c (method_definition_addref_complement): add to count
+ complemented method entries number.
+
+ * vm_method.c (rb_method_definition_release): release `def' iff
+ alias_count == 0 and complemented_count == 0.
+
+ * test/ruby/test_module.rb: add a test.
+
Wed Nov 18 17:06:19 2015 Koichi Sasada <ko1@atdot.net>
* gc.c (rb_raw_obj_info): fix trivial issues.