From: Charles Nutter <redmine@...>
Date: 2011-01-26T16:56:43+09:00
Subject: [ruby-core:34863] [Ruby 1.9-Bug#4323] Proc#hash is Ill-Behaved

Issue #4323 has been updated by Charles Nutter.


I believe your example case, run in IRB, is also flawed. Witness:

~/projects/jruby ��� irb1.9
>> ->{}
=> #<Proc:0x00000100aba6c0@(irb):1 (lambda)>
>> ->{}
=> #<Proc:0x00000100ab8cf8@(irb):2 (lambda)>
>> ->{}
=> #<Proc:0x00000100ab64a8@(irb):3 (lambda)>

Oh ho you say, but that doesn't mean they should not be equivalent. Au contraire:

>> a = []
=> []
>> a << ->{}
=> [#<Proc:0x00000100afee60@(irb):2 (lambda)>]
>> a << ->{}
=> [#<Proc:0x00000100afee60@(irb):2 (lambda)>, #<Proc:0x00000100afb170@(irb):3 (lambda)>]
>> a[0].eql?(a[1])
=> false

IRB is a bad place to demonstrate such things because the bindings are changing around all the time. Your examples do show different hash values (and your expected eql? results) within a script, however.
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