Forum: Ruby-core [Closed] class_variable_set issue with duped Module

Issue #3080 has been updated by nobu (Nobuyoshi Nakada).

Status changed from Assigned to Closed


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Bug #3080: class_variable_set issue with duped Module
https://bugs.ruby-lang.org/issues/3080#change-35124

Author: dolzenko (Evgeniy Dolzhenko)
Status: Closed
Priority: Normal
Assignee: nobu (Nobuyoshi Nakada)
Category:
Target version: 2.0.0
ruby -v: ruby 1.9.2dev (2010-04-02 trunk 27162) [i686-linux]


=begin
 Below is the test case which is failing for me on ruby 1.9.2dev 
(2010-04-02 trunk 27162) [i686-linux] but works on ruby 1.8.7 
(2009-12-24 patchlevel 248) [i686-linux]:

 ---
 module Original
   @@cvar = nil

   def self.module_get_cvar
     @@cvar
   end

   def function_get_cvar
     @@cvar
   end
 end

 Duped = Original.dup

 Original.send(:class_variable_set, :@@cvar, "cvar in Original")
 Duped.send(:class_variable_set, :@@cvar, "cvar in Duped")

 class IncludesOriginal
   include Original
 end

 class IncludesDuped
   include Duped
 end

 puts IncludesOriginal.new.function_get_cvar # => cvar in Original
 puts IncludesDuped.new.function_get_cvar # => cvar in Duped

 puts Original.module_get_cvar # => cvar in Original

 puts Duped.module_get_cvar # => 
19_duped_module_class_variable_set_bug.rb:3: warning: class variable 
access from toplevel
                            # 
19_duped_module_class_variable_set_bug.rb:3:in `get_cvar': uninitialized 
class variable @@cvar in Object (NameError)
                            #            from 
19_duped_module_class_variable_set_bug.rb:13:in `<main>'
 ---
=end