Bug #21318: Namespaces leak with Module.nesting

• Status: Closed
• Assignee: tagomoris (Satoshi Tagomori)
• Target version: -
• Backport: 3.2: UNKNOWN, 3.3: UNKNOWN, 3.4: UNKNOWN
• Tags: box

[fxn (Xavier Noria)]

Namespaces are not transparent for this program:

Module.nesting

The nesting is empty or not depending on whether it is being executed under a namespace.

[fxn (Xavier Noria)]

• Subject changed from Namespaces leak with permanent names to Namespaces leak with Module.nesting

[Eregon (Benoit Daloze)]

Complete reproducer:

$ RUBY_NAMESPACE=1 ruby -ve 'p Module.nesting; ns = Namespace.new; File.write "ns.rb", "p Module.nesting"; ns.require "./ns"'
ruby 3.5.0dev (2025-05-10T07:50:29Z namespace-on-read-.. bd4f57f96b) +PRISM [x86_64-linux]
ruby: warning: Namespace is experimental, and the behavior may change in the future!
See doc/namespace.md for know issues, etc.
[]
[#<Namespace:24,user,optional>]

[hsbt (Hiroshi SHIBATA)]

• Tags set to namespace

[tagomoris (Satoshi Tagomori)]

• Assignee set to tagomoris (Satoshi Tagomori)

[tagomoris (Satoshi Tagomori)]

• Status changed from Open to Closed

Now Module.nesting doesn't return its box information in a box.

MBA:build s-tagomori$ RUBY_BOX=1 ./exe/ruby -v
ruby 4.0.0dev (2025-12-09T12:29:36Z box-news-documents.. c998717de8) +PRISM [arm64-darwin24]
MBA:build s-tagomori$ RUBY_BOX=1 ./exe/ruby -ve 'p Module.nesting; ns = Ruby::Box.new; File.write "ns.rb", "p Module.nesting"; ns.require "./ns"'
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.
[]
[]
MBA:build s-tagomori$