From: "drbrain (Eric Hodel)" <drbrain@...7.net>
Date: 2013-12-03T09:05:30+09:00
Subject: [ruby-core:58809] [ruby-trunk - Bug #9202][Assigned] Array#uniq	freezes duplicate strings


Issue #9202 has been reported by drbrain (Eric Hodel).

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Bug #9202: Array#uniq freezes duplicate strings
https://bugs.ruby-lang.org/issues/9202

Author: drbrain (Eric Hodel)
Status: Assigned
Priority: Normal
Assignee: charliesome (Charlie Somerville)
Category: core
Target version: current: 2.1.0
ruby -v: ruby 2.0.0dev (2012-11-29 trunk 37968) [x86_64-darwin12.2.0]
Backport: 1.9.3: DONTNEED, 2.0.0: DONTNEED


I imagine this is related to the recent frozen string changes.  This behavior change in Array#uniq breaks RubyGems:

$ cat test.rb
p unique: %w[a].uniq.any? { |item| item.frozen? }
p duplicate: %w[a a].uniq.any? { |item| item.frozen? }
$ ruby -v test.rb
ruby 2.0.0p247 (2013-06-27 revision 41674) [x86_64-darwin12.4.0]
{:unique=>false}
{:duplicate=>false}
$ make runruby
./miniruby -I../trunk/lib -I. -I.ext/common  ../trunk/tool/runruby.rb --extout=.ext  -- --disable-gems ../trunk/test.rb
{:unique=>false}
{:duplicate=>true}



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