[ruby-core:122558] [Ruby Bug#21446] StackOverflow when changing visibility in reopened refinement

19 Jun 2025

      Issue #21446 has been reported by luke-gru (Luke Gruber).

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Bug #21446: StackOverflow when changing visibility in reopened refinement
https://bugs.ruby-lang.org/issues/21446

* Author: luke-gru (Luke Gruber)
* Status: Open
* ruby -v: 3.5.0
* Backport: 3.2: UNKNOWN, 3.3: UNKNOWN, 3.4: UNKNOWN
----------------------------------------
```ruby
class A
  def a
    :a
  end
end
class B < A
end

module R
  refine B do
    private :a
  end
end
module R
  refine B do
    public :a
  end
end
using R
B.new.a # StackOverflow
```

I would expect it to change the visibility, not to overflow the stack.

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