[ruby-core:101395] [Ruby master Bug#17374] Refined methods aren't visible from a refinement's module

Issue #17374 has been updated by Dan0042 (Daniel DeLorme).


I tried testing this and immediately ran into this issue: (in latest master)

```ruby
class Foo
  module Extension
    module Implementation
      def foo
        super(bar)
      end

      def bar
        42
      end
    end

    refine Foo do
      prepend Implementation
    end
  end

  def foo(value = :none)
    p value
  end
end

Foo.new.foo # => :none (ok)

Foo.prepend Foo::Extension::Implementation
Foo.new.foo # => :none ... not 42 as expected
```

So it appears like `Foo.prepend Foo::Extension::Implementation` has no effect. But if I just comment out the `prepend Implementation` line it works as expected. Note that there's no `using` anywhere anyway. I'm at a loss to explain what's going on here. But I think more than ever that module inclusion to define refined methods is not just "not recommended", it should be prevented by raising an error. Or at least output a warning.

----------------------------------------
Bug #17374: Refined methods aren't visible from a refinement's module
https://bugs.ruby-lang.org/issues/17374#change-89155

* Author: marcandre (Marc-Andre Lafortune)
* Status: Rejected
* Priority: Normal
* Assignee: shugo (Shugo Maeda)
* Backport: 2.5: UNKNOWN, 2.6: UNKNOWN, 2.7: UNKNOWN
----------------------------------------




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