[ruby-core:107722] [Ruby master Bug#18600] Aliased method visibility issue on Ruby 3.1

Issue #18600 has been reported by gmcgibbon (Gannon McGibbon).

----------------------------------------
Bug #18600: Aliased method visibility issue on Ruby 3.1
https://bugs.ruby-lang.org/issues/18600

* Author: gmcgibbon (Gannon McGibbon)
* Status: Open
* Priority: Normal
* ruby -v: 3.1.0
* Backport: 2.6: UNKNOWN, 2.7: UNKNOWN, 3.0: UNKNOWN, 3.1: UNKNOWN
----------------------------------------
It seems methods on classes that were originally private in the parent and made public in the child can no longer be aliased correctly:

```
class C
  public :system
  alias_method :bar, :system
  alias_method :system, :bar
end

p RUBY_VERSION
p [C.new.respond_to?(:system), C.new.respond_to?(:system, true)]
```

On Ruby <= 3.0.3, this returns `[true, true]`, but on Ruby >= 3.1.0 this returns `[false, true]`. The aliased method seems to revert visibility to the parent.



-- 
https://bugs.ruby-lang.org/

Unsubscribe: <mailto:[e-mail]?subject=unsubscribe>
<http://lists.ruby-lang.org/cgi-bin/mailman/options/ruby-core>