From: "tenderlovemaking (Aaron Patterson) via ruby-core" <ruby-core@...>
Date: 2025-05-14T01:28:42+00:00
Subject: [ruby-core:122084] [Ruby Feature#21335] Namespaces should be present in the backtrace

Issue #21335 has been updated by tenderlovemaking (Aaron Patterson).


mame (Yusuke Endoh) wrote in #note-2:
> As the current behavior of the backtrace, if the receiver class is completely bound to the constant names, they are prefixed to the method names in the backtrace.

Ah, ok, I didn't know that.  Thank you.

I'm not sure if printing the address or the `ns_id` is better. Either works for me, but I'm not sure what would be most ergonomic.

----------------------------------------
Feature #21335: Namespaces should be present in the backtrace
https://bugs.ruby-lang.org/issues/21335#change-113239

* Author: tenderlovemaking (Aaron Patterson)
* Status: Open
----------------------------------------
Namespaces can call in to other name spaces. I think it might be helpful if namespace information is in the backtrace.

For example:

```ruby
File.binwrite "foo.rb", <<-eorb
class Foo
  def self.test(ns1, ns2, count)
    if count == 0
      puts caller
    else
      if count % 2 == 0
        ns1::Foo.test(ns1, ns2, count - 1)
      else
        ns2::Foo.test(ns1, ns2, count - 1)
      end
    end
  end
end
eorb

ns1 = Namespace.new
ns1.load "foo.rb"

ns2 = Namespace.new
ns2.load "foo.rb"

ns1::Foo.test(ns1, ns2, 10)
```

The output is like this:

```
See doc/namespace.md for known issues, etc.
/Users/aaron/git/ruby/exe/ruby: warning: Namespace is experimental, and the behavior may change in the future!
See doc/namespace.md for known issues, etc.
/Users/aaron/git/ruby/foo.rb:9:in 'test'
/Users/aaron/git/ruby/foo.rb:7:in 'test'
/Users/aaron/git/ruby/foo.rb:9:in 'test'
/Users/aaron/git/ruby/foo.rb:7:in 'test'
/Users/aaron/git/ruby/foo.rb:9:in 'test'
/Users/aaron/git/ruby/foo.rb:7:in 'test'
/Users/aaron/git/ruby/foo.rb:9:in 'test'
/Users/aaron/git/ruby/foo.rb:7:in 'test'
/Users/aaron/git/ruby/foo.rb:9:in 'test'
/Users/aaron/git/ruby/foo.rb:7:in 'test'
./test.rb:23:in '<main>'
```

`Foo.test` alternates between namespaces when calling a method, but you can't tell from the backtrace.  I think we should include namespaces in the backtrace.



-- 
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