Fix memory leak at the same named alias [Bug #18516]

When aliasing a method to the same name method, set a separate bit
flag on that method definition, instead of the reference count
increment.  Although this kind of alias has no actual effect at
runtime, is used as the hack to suppress the method re-definition
warning.

1 files changed, 1 insertions, 0 deletions

diff --git a/method.h b/method.h
index 815fd9da47..2f4504bfec 100644
--- a/method.h
+++ b/method.h
@@ -181,6 +181,7 @@ struct rb_method_definition_struct {
     unsigned int iseq_overload: 1;
     int alias_count : 27;
     int complemented_count : 28;
+    unsigned int no_redef_warning: 1;
 
     union {
         rb_method_iseq_t iseq;