From: "kosaki (Motohiro KOSAKI)" <kosaki.motohiro@...>
Date: 2012-10-02T03:05:17+09:00
Subject: [ruby-core:47791] [ruby-trunk - Bug #7097][Assigned] Thread locals don't work inside Enumerator


Issue #7097 has been updated by kosaki (Motohiro KOSAKI).

Status changed from Open to Assigned
Assignee set to ko1 (Koichi Sasada)

I guess it's a side effect to use Fiber in Enumerator internal.

ko1: what do you think?

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Bug #7097: Thread locals don't work inside Enumerator
https://bugs.ruby-lang.org/issues/7097#change-29915

Author: tenderlovemaking (Aaron Patterson)
Status: Assigned
Priority: Normal
Assignee: ko1 (Koichi Sasada)
Category: 
Target version: 
ruby -v: ruby 2.0.0dev (2012-09-25 trunk 37032) [x86_64-darwin12.2.0]


I set a thread local outside an Enumerator.  The Enumerator runs inside the same thread where I set the local.  I would expect the thread local to be available since I am in the same thread, but it is not.

Here is a test that shows the problem:

require 'minitest/autorun'

class ThreadLocalBreaks < MiniTest::Unit::TestCase
  def test_thread_local_in_enumerator
    Thread.current[:foo] = "bar"

    thread, value = Enumerator.new { |y|
      y << [Thread.current, Thread.current[:foo]]
    }.next

    assert_equal Thread.current, thread       # passes
    assert_equal Thread.current[:foo], value  # fails
  end
end



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