Forum: Ruby-core [ruby-trunk - Bug #7107][Open] Ruby can no longer find constants in methods in anonymous modules

Issue #7107 has been reported by drbrain (Eric Hodel).

----------------------------------------
Bug #7107: Ruby can no longer find constants in methods in anonymous 
modules
https://bugs.ruby-lang.org/issues/7107

Author: drbrain (Eric Hodel)
Status: Open
Priority: Normal
Assignee:
Category: core
Target version: 2.0.0
ruby -v: ruby 2.0.0dev (2012-09-06 trunk 36915) [x86_64-darwin12.1.0]


=begin
With ruby 1.9 and newer C cannot be found if m is duplicated:

  module M
    C = 1

    def self.m
      C
    end
  end

  puts 'named module'
  M.m

  puts 'anonymous module'
  m = M.dup
  m.m

Ruby 1.8:


  $ ruby -v t.rb
  ruby 1.8.7 (2012-02-08 patchlevel 358) [universal-darwin12.0]
  named module
  anonymous module

With Ruby 1.9:

  $ ruby19 -v t.rb
  ruby 1.9.3p194 (2012-04-20 revision 35410) [x86_64-darwin12.2.0]
  named module
  anonymous module
  t.rb:5:in `m': uninitialized constant Module::C (NameError)
    from t.rb:14:in `<main>'

With trunk:

    $ ruby19 -v t.rb
    ruby 1.9.3p194 (2012-04-20 revision 35410) [x86_64-darwin12.2.0]
    named module
    anonymous module
    t.rb:5:in `m': uninitialized constant Module::C (NameError)
      from t.rb:14:in `<main>'

(({m::C})) works in all three versions, though.
=end

Issue #7107 has been updated by drbrain (Eric Hodel).


=begin
Additionally, when the module is given a name it still can't find the 
constant:


  module M
    C = 1

    def self.m
      C
    end
  end

  puts 'named module'
  M.m

  puts 'anonymous module'
  m = M.dup
  begin
    m.m
  rescue NameError
    p $!
  end

  puts 're-named module'
  N = m
  begin
    N.m
  rescue NameError
    p $!
  end

Ruby trunk:

  $ ruby20 -v t.rb
  ruby 2.0.0dev (2012-09-06 trunk 36915) [x86_64-darwin12.1.0]
  named module
  anonymous module
  #<NameError: uninitialized constant Module::C>
  re-named module
  #<NameError: uninitialized constant Module::C>


=end

----------------------------------------
Bug #7107: Ruby can no longer find constants in methods in anonymous 
modules
https://bugs.ruby-lang.org/issues/7107#change-30113

Author: drbrain (Eric Hodel)
Status: Open
Priority: Normal
Assignee:
Category: core
Target version: 2.0.0
ruby -v: ruby 2.0.0dev (2012-09-06 trunk 36915) [x86_64-darwin12.1.0]


=begin
With ruby 1.9 and newer C cannot be found if m is duplicated:

  module M
    C = 1

    def self.m
      C
    end
  end

  puts 'named module'
  M.m

  puts 'anonymous module'
  m = M.dup
  m.m

Ruby 1.8:


  $ ruby -v t.rb
  ruby 1.8.7 (2012-02-08 patchlevel 358) [universal-darwin12.0]
  named module
  anonymous module

With Ruby 1.9:

  $ ruby19 -v t.rb
  ruby 1.9.3p194 (2012-04-20 revision 35410) [x86_64-darwin12.2.0]
  named module
  anonymous module
  t.rb:5:in `m': uninitialized constant Module::C (NameError)
    from t.rb:14:in `<main>'

With trunk:

    $ ruby19 -v t.rb
    ruby 1.9.3p194 (2012-04-20 revision 35410) [x86_64-darwin12.2.0]
    named module
    anonymous module
    t.rb:5:in `m': uninitialized constant Module::C (NameError)
      from t.rb:14:in `<main>'

(({m::C})) works in all three versions, though.
=end

Issue #7107 has been updated by ko1 (Koichi Sasada).

Assignee set to mame (Yusuke Endoh)


----------------------------------------
Bug #7107: Ruby can no longer find constants in methods in anonymous 
modules
https://bugs.ruby-lang.org/issues/7107#change-31732

Author: drbrain (Eric Hodel)
Status: Open
Priority: Normal
Assignee: mame (Yusuke Endoh)
Category: core
Target version: 2.0.0
ruby -v: ruby 2.0.0dev (2012-09-06 trunk 36915) [x86_64-darwin12.1.0]


=begin
With ruby 1.9 and newer C cannot be found if m is duplicated:

  module M
    C = 1

    def self.m
      C
    end
  end

  puts 'named module'
  M.m

  puts 'anonymous module'
  m = M.dup
  m.m

Ruby 1.8:


  $ ruby -v t.rb
  ruby 1.8.7 (2012-02-08 patchlevel 358) [universal-darwin12.0]
  named module
  anonymous module

With Ruby 1.9:

  $ ruby19 -v t.rb
  ruby 1.9.3p194 (2012-04-20 revision 35410) [x86_64-darwin12.2.0]
  named module
  anonymous module
  t.rb:5:in `m': uninitialized constant Module::C (NameError)
    from t.rb:14:in `<main>'

With trunk:

    $ ruby19 -v t.rb
    ruby 1.9.3p194 (2012-04-20 revision 35410) [x86_64-darwin12.2.0]
    named module
    anonymous module
    t.rb:5:in `m': uninitialized constant Module::C (NameError)
      from t.rb:14:in `<main>'

(({m::C})) works in all three versions, though.
=end

Issue #7107 has been updated by mame (Yusuke Endoh).

Status changed from Open to Assigned
Assignee changed from mame (Yusuke Endoh) to nobu (Nobuyoshi Nakada)

Indeed, it looks a bug.  Nobu, could you investigate?

--
Yusuke Endoh <mame@tsg.ne.jp>
----------------------------------------
Bug #7107: Ruby can no longer find constants in methods in anonymous 
modules
https://bugs.ruby-lang.org/issues/7107#change-31788

Author: drbrain (Eric Hodel)
Status: Assigned
Priority: Normal
Assignee: nobu (Nobuyoshi Nakada)
Category: core
Target version: 2.0.0
ruby -v: ruby 2.0.0dev (2012-09-06 trunk 36915) [x86_64-darwin12.1.0]


=begin
With ruby 1.9 and newer C cannot be found if m is duplicated:

  module M
    C = 1

    def self.m
      C
    end
  end

  puts 'named module'
  M.m

  puts 'anonymous module'
  m = M.dup
  m.m

Ruby 1.8:


  $ ruby -v t.rb
  ruby 1.8.7 (2012-02-08 patchlevel 358) [universal-darwin12.0]
  named module
  anonymous module

With Ruby 1.9:

  $ ruby19 -v t.rb
  ruby 1.9.3p194 (2012-04-20 revision 35410) [x86_64-darwin12.2.0]
  named module
  anonymous module
  t.rb:5:in `m': uninitialized constant Module::C (NameError)
    from t.rb:14:in `<main>'

With trunk:

    $ ruby19 -v t.rb
    ruby 1.9.3p194 (2012-04-20 revision 35410) [x86_64-darwin12.2.0]
    named module
    anonymous module
    t.rb:5:in `m': uninitialized constant Module::C (NameError)
      from t.rb:14:in `<main>'

(({m::C})) works in all three versions, though.
=end

Issue #7107 has been updated by tarui (Masaya Tarui).


hi,

I found strange behavior.

$ ruby -e "module M;C=1;def self.f;C end end;d=M.dup;p M.f;p d.f;class 
A;end;p d.f"
1
1
-e:1:in `f': uninitialized constant Module::C (NameError)
        from -e:1:in `<main>'

It seems to hold the problem in InlineCache too.

----------------------------------------
Bug #7107: Ruby can no longer find constants in methods in anonymous 
modules
https://bugs.ruby-lang.org/issues/7107#change-34675

Author: drbrain (Eric Hodel)
Status: Assigned
Priority: Normal
Assignee: nobu (Nobuyoshi Nakada)
Category: core
Target version: 2.0.0
ruby -v: ruby 2.0.0dev (2012-09-06 trunk 36915) [x86_64-darwin12.1.0]


=begin
With ruby 1.9 and newer C cannot be found if m is duplicated:

  module M
    C = 1

    def self.m
      C
    end
  end

  puts 'named module'
  M.m

  puts 'anonymous module'
  m = M.dup
  m.m

Ruby 1.8:


  $ ruby -v t.rb
  ruby 1.8.7 (2012-02-08 patchlevel 358) [universal-darwin12.0]
  named module
  anonymous module

With Ruby 1.9:

  $ ruby19 -v t.rb
  ruby 1.9.3p194 (2012-04-20 revision 35410) [x86_64-darwin12.2.0]
  named module
  anonymous module
  t.rb:5:in `m': uninitialized constant Module::C (NameError)
    from t.rb:14:in `<main>'

With trunk:

    $ ruby19 -v t.rb
    ruby 1.9.3p194 (2012-04-20 revision 35410) [x86_64-darwin12.2.0]
    named module
    anonymous module
    t.rb:5:in `m': uninitialized constant Module::C (NameError)
      from t.rb:14:in `<main>'

(({m::C})) works in all three versions, though.
=end

Issue #7107 has been updated by tarui (Masaya Tarui).


additional sample.
d.f referring to M::C is correct? or d::C?

$ ruby -e "module M;C=1;def self.f;C end end;d=M.dup;p M.f;p 
d.f;d::C=2;p M.f;p d::C;p d.f"
1
1
-e:1: warning: already initialized constant 
#<Module:0x007ffb39f4c860>::C
-e:1: warning: previous definition of C was here
1
2
1
----------------------------------------
Bug #7107: Ruby can no longer find constants in methods in anonymous 
modules
https://bugs.ruby-lang.org/issues/7107#change-34676

Author: drbrain (Eric Hodel)
Status: Assigned
Priority: Normal
Assignee: nobu (Nobuyoshi Nakada)
Category: core
Target version: 2.0.0
ruby -v: ruby 2.0.0dev (2012-09-06 trunk 36915) [x86_64-darwin12.1.0]


=begin
With ruby 1.9 and newer C cannot be found if m is duplicated:

  module M
    C = 1

    def self.m
      C
    end
  end

  puts 'named module'
  M.m

  puts 'anonymous module'
  m = M.dup
  m.m

Ruby 1.8:


  $ ruby -v t.rb
  ruby 1.8.7 (2012-02-08 patchlevel 358) [universal-darwin12.0]
  named module
  anonymous module

With Ruby 1.9:

  $ ruby19 -v t.rb
  ruby 1.9.3p194 (2012-04-20 revision 35410) [x86_64-darwin12.2.0]
  named module
  anonymous module
  t.rb:5:in `m': uninitialized constant Module::C (NameError)
    from t.rb:14:in `<main>'

With trunk:

    $ ruby19 -v t.rb
    ruby 1.9.3p194 (2012-04-20 revision 35410) [x86_64-darwin12.2.0]
    named module
    anonymous module
    t.rb:5:in `m': uninitialized constant Module::C (NameError)
      from t.rb:14:in `<main>'

(({m::C})) works in all three versions, though.
=end

Issue #7107 has been updated by charliesome (Charlie Somerville).


=begin

Nobu, I have found the cause of the bug - the cref_stack of methods are 
not fixed up to point to the new class/module when the class/module is 
duped.

Do you want me to commit it or attach it here for your review?

=end
----------------------------------------
Bug #7107: Ruby can no longer find constants in methods in anonymous 
modules
https://bugs.ruby-lang.org/issues/7107#change-34758

Author: drbrain (Eric Hodel)
Status: Assigned
Priority: Normal
Assignee: nobu (Nobuyoshi Nakada)
Category: core
Target version: 2.0.0
ruby -v: ruby 2.0.0dev (2012-09-06 trunk 36915) [x86_64-darwin12.1.0]


=begin
With ruby 1.9 and newer C cannot be found if m is duplicated:

  module M
    C = 1

    def self.m
      C
    end
  end

  puts 'named module'
  M.m

  puts 'anonymous module'
  m = M.dup
  m.m

Ruby 1.8:


  $ ruby -v t.rb
  ruby 1.8.7 (2012-02-08 patchlevel 358) [universal-darwin12.0]
  named module
  anonymous module

With Ruby 1.9:

  $ ruby19 -v t.rb
  ruby 1.9.3p194 (2012-04-20 revision 35410) [x86_64-darwin12.2.0]
  named module
  anonymous module
  t.rb:5:in `m': uninitialized constant Module::C (NameError)
    from t.rb:14:in `<main>'

With trunk:

    $ ruby19 -v t.rb
    ruby 1.9.3p194 (2012-04-20 revision 35410) [x86_64-darwin12.2.0]
    named module
    anonymous module
    t.rb:5:in `m': uninitialized constant Module::C (NameError)
      from t.rb:14:in `<main>'

(({m::C})) works in all three versions, though.
=end

Issue #7107 has been updated by charliesome (Charlie Somerville).

Assignee changed from nobu (Nobuyoshi Nakada) to charliesome (Charlie 
Somerville)


----------------------------------------
Bug #7107: Ruby can no longer find constants in methods in anonymous 
modules
https://bugs.ruby-lang.org/issues/7107#change-34786

Author: drbrain (Eric Hodel)
Status: Assigned
Priority: Normal
Assignee: charliesome (Charlie Somerville)
Category: core
Target version: 2.0.0
ruby -v: ruby 2.0.0dev (2012-09-06 trunk 36915) [x86_64-darwin12.1.0]


=begin
With ruby 1.9 and newer C cannot be found if m is duplicated:

  module M
    C = 1

    def self.m
      C
    end
  end

  puts 'named module'
  M.m

  puts 'anonymous module'
  m = M.dup
  m.m

Ruby 1.8:


  $ ruby -v t.rb
  ruby 1.8.7 (2012-02-08 patchlevel 358) [universal-darwin12.0]
  named module
  anonymous module

With Ruby 1.9:

  $ ruby19 -v t.rb
  ruby 1.9.3p194 (2012-04-20 revision 35410) [x86_64-darwin12.2.0]
  named module
  anonymous module
  t.rb:5:in `m': uninitialized constant Module::C (NameError)
    from t.rb:14:in `<main>'

With trunk:

    $ ruby19 -v t.rb
    ruby 1.9.3p194 (2012-04-20 revision 35410) [x86_64-darwin12.2.0]
    named module
    anonymous module
    t.rb:5:in `m': uninitialized constant Module::C (NameError)
      from t.rb:14:in `<main>'

(({m::C})) works in all three versions, though.
=end