From: Curt Hagenlocher <curth@...>
Date: 2008-10-10T00:20:01+09:00
Subject: [ruby-core:19246] Re: Module.freeze vs Object.freeze

Yukihiro Matsumoto [mailto:matz@ruby-lang.org] writes:

> It initializes internal name field before freezing it.  The following
> code will show the difference:

> # comment out the following line to see the difference.
> Module.send :remove_method, :freeze
> m = Module.new
> m.freeze
> M = m
> p m

Thanks, but I don't see any difference in 1.8.6 (patchlevel 111).  Is this something that has changed in 1.8.7 or 1.9?

C:\dd\vsl_dynamic_2\src\Merlin\Main\Hosts\IronRails>irb
irb(main):001:0> m = Module.new
=> #<Module:0x38cde78>
irb(main):002:0> m.freeze
=> #<Module:0x38cde78>
irb(main):003:0> M = m
=> M
irb(main):004:0> p m
M
=> nil
irb(main):005:0>

C:\dd\vsl_dynamic_2\src\Merlin\Main\Hosts\IronRails>irb
irb(main):001:0> Module.send :remove_method, :freeze
=> Module
irb(main):002:0> m = Module.new
=> #<Module:0x3077a8>
irb(main):003:0> m.freeze
=> #<Module:0x3077a8>
irb(main):004:0> M = m
=> M
irb(main):005:0> p m
M
=> nil
irb(main):006:0>

--
Curt Hagenlocher
curth@microsoft.com