String hash keys should be copied
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Key: JRUBY-4029
URL: http://jira.codehaus.org/browse/JRUBY-4029
Project: JRuby
Issue Type: Bug
Components: Core Classes/Modules
Environment: JRuby 1.5.0dev
Reporter: Yutaka HARA
Priority: Minor
CRuby copies the hash key if it is a String (in case the key is modified).
Exmaple:
s = "foo"
h = {s => 1}
s.reverse!
p h["foo"] #=> 1 in Ruby 1.8/1.9 ; nil in JRuby 1.5.0dev
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