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Backport #4578

Updated by jeremyevans0 (Jeremy Evans) 11 months ago

=begin 
 
 Using ruby 1.8.7 p334 

 a = 5; a.freeze 

 Expect:    true == a.frozen? 
 Result:    false == a.frozen? 

 I realize Fixnum is already immutable, however consider the following code: 

 class Demanding 
     attr_reader :important 

     def initialize(important) 
         @important = important 
         @important.freeze 
     end 
 end 

 Demanding wants to be able to rely on identifier not changing over its lifespan.    I could make it demanding with some other mechanism such as: 
  * Force important to be a particular type 
  * Force important to respond_to? particular messages during initialization 

 These are all slippery and don't address the concern of mutability of important objects.    Freeze seemed like the obvious solution, but it's probably best for me to just take a deep copy of important for Demanding's own use. 

 In the meantime, I thought I should share that freeze is not working for all objects in Ruby 1.8.7 p334. 
 
 =end 
 

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