From: Heesob Park <redmine@...>
Date: 2010-12-01T10:43:38+09:00
Subject: [ruby-core:33500] [Ruby 1.9-Feature#4104][Open] String#hash should return different value for different string.

Feature #4104: String#hash should return different value for different string.
http://redmine.ruby-lang.org/issues/show/4104

Author: Heesob Park
Status: Open, Priority: Normal
Category: core, Target version: 1.9.x

On Ruby 1.9.x, String#hash returns same value for any "\x00" trailing string.

C:\work>irb
irb(main):001:0> "a".hash
=> -242103097
irb(main):002:0> "a\x00".hash
=> -242103097
irb(main):003:0> "a\x00\x00".hash
=> -242103097


On Ruby 1.8.6, String#hash returns different value for different string.

C:\work>irb
irb(main):001:0> "a".hash
=> 100
irb(main):002:0> "a\x00".hash
=> 6561949
irb(main):003:0> "a\x00\x00".hash
=> 826408672

I think that String#hash should return different value for different string.


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