From: "tagomoris (Satoshi Tagomori) via ruby-core" <ruby-core@...>
Date: 2025-12-09T12:57:28+00:00
Subject: [ruby-core:124100] [Ruby Bug#21320] Namespaces leak with constant lookup

Issue #21320 has been updated by tagomoris (Satoshi Tagomori).

Status changed from Open to Closed

This issue is fixed now.

```
MBA:build s-tagomori$ cat b.rb
X = :top

class C
  X = :super
end

class D < C
  p X
end
MBA:build s-tagomori$ RUBY_BOX=1 ./exe/ruby -ve 'puts "in main"; require "./b"; puts "in box"; Ruby::Box.new.require "./b"' 
ruby 4.0.0dev (2025-12-09T12:29:36Z box-news-documents.. c998717de8) +PRISM [arm64-darwin24]
./exe/ruby: warning: Ruby::Box is experimental, and the behavior may change in the future!
See doc/language/box.md for known issues, etc.
in main
:super
in box
:super
MBA:build s-tagomori$ ./exe/ruby -v
ruby 4.0.0dev (2025-12-09T12:29:36Z box-news-documents.. c998717de8) +PRISM [arm64-darwin24]
MBA:build s-tagomori$ 
```

----------------------------------------
Bug #21320: Namespaces leak with constant lookup
https://bugs.ruby-lang.org/issues/21320#change-115544

* Author: fxn (Xavier Noria)
* Status: Closed
* Assignee: tagomoris (Satoshi Tagomori)
* Backport: 3.2: UNKNOWN, 3.3: UNKNOWN, 3.4: UNKNOWN
----------------------------------------
The following program

```ruby
X = :top

class C
  X = :super
end

class D < C
  p X
end
```

prints `:super` normally, and `:top` if running under a namespace.



-- 
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