From: Andrew Grimm <andrew.j.grimm@...>
Date: 2011-12-31T10:06:03+09:00
Subject: [ruby-core:41858] [ruby-trunk - Bug #5828][Open] Non anonymous classes can't be frozen, cloned and then inspected


Issue #5828 has been reported by Andrew Grimm.

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Bug #5828: Non anonymous classes can't be frozen, cloned and then inspected
https://bugs.ruby-lang.org/issues/5828

Author: Andrew Grimm
Status: Open
Priority: Low
Assignee: 
Category: 
Target version: 
ruby -v: ruby 2.0.0dev (2011-11-27 trunk 33860) [x86_64-darwin10.8.0] 


=begin
If you assign a class to a constant (that is, it isn't anonymous), and you freeze it and then clone it, you can't call to_s on it.

    MyClass = Class.new ; MyClass.freeze.clone.to_s
    RuntimeError: can't modify frozen Class
    	from (irb):1:in `to_s'
    	from (irb):1
    	from /Users/agrimm/.rvm/rubies/ruby-head/bin/irb:16:in `<main>'

    MyConstantObject = Object.new ; MyConstantObject.freeze.clone.to_s # => "#<Object:0x00000100884d60>"
    MyClass_2 = Class.new ; MyClass_2.clone.to_s # => "#<Class:0x00000100872930>"
    MyClass_3 = Class.new ; MyClass_3.freeze.to_s # => "MyClass_3" 
    MyClass_4 = Class.new.freeze ; MyClass_4.clone.to_s # => "#<Class:0x0000010088d4d8>" 
    MyClass_5 = Class.new.freeze ; MyClass_5.freeze.clone.to_s # => An exception
    local_variable_class = Class.new ; local_variable_class.freeze.clone.to_s # => "#<Class:0x00000100964028>" 

Presumably this is caused by class only determining whether it's assigned to a constant when it's first inspected.

I don't have a use case for freezing and cloning a class.
=end




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