[ruby-core:60790] [ruby-trunk - Bug #9187] st_table leaks when exception is raised in Hash#rehash

Issue #9187 has been updated by Tomoyuki Chikanaga.

Backport changed from 1.9.3: DONE, 2.0.0: REQUIRED to 1.9.3: DONE, 2.0.0: DONE

r43942, r43957 and r43975 were backported to ruby_2_0_0 at r45011.

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Bug #9187: st_table leaks when exception is raised in Hash#rehash
https://bugs.ruby-lang.org/issues/9187#change-45205

* Author: Masaki Matsushita
* Status: Closed
* Priority: Normal
* Assignee: Masaki Matsushita
* Category: core
* Target version: 2.1.0
* ruby -v: ruby 2.1.0dev (2013-12-01 trunk 43941) [x86_64-linux]
* Backport: 1.9.3: DONE, 2.0.0: DONE
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Following code causes leakage of st_table:

class Foo
  def initialize
    @raise = false
  end

  def hash
    raise if @raise
    @raise = true
    return 0
  end
end

h = {Foo.new => true}
10_0000.times do
  h.rehash rescue nil
end



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