Issue #4542 has been reported by Yutaka HARA.

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Bug #4542: test_threaded_flush sometimes fails
http://redmine.ruby-lang.org/issues/4542

Author: Yutaka HARA
Status: Open
Priority: Normal
Assignee: 
Category: core
Target version: 1.9.x
ruby -v: ruby 1.9.2p180 (2011-02-18 revision 30909) [i686-linux]


test-all of Ruby 1.9.2 p180 sometimes shows the following error:

   2) Failure:
 test_threaded_flush(TestIO) [/var/home/yhara/ruby-1.9.2-p180/test/ruby/test_io.rb:1670]:
 <["\"hi!\""]> expected but was
 <[]>.

Unfortunately, this rarely reproduces.
* 1 of 10 tries on CentOS 5.5
* 1 on Ubuntu 10.10


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