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From: Eric Wong <normalperson@yhbt.net>
Newsgroups: gmane.comp.lang.ruby.kgio.general
Subject: Re: kgio test_signal_close failed
Date: Sun, 4 Mar 2012 19:17:52 +0000
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375gnu <375gnu@gmail.com> wrote:
> Sometimes test_signal_close from test_poll.rb fails. Not every time, and only
> with ruby1.9 (1.9.3.0 is my current version). With ruby 1.8.7 it's passed.

Is this also on Debian/kfreebsd?  I have a VM for that lying around
somewhere, will investigate as I find time.

> There is an output:
> 
> Failure: <IOError> exception expected but none was thrown.
> test_signal_close(TestPoll)
> /home/globus/work/pkg-ruby-extras/build-area/ruby-kgio-2.7.2/test/test_poll.rb:61:in
> `test_signal_close'
>     58:     res = nil
>     59:     thr = Thread.new { sleep 0.100; Process.kill(:USR1, $$) }

Does increasing the sleep time there help?  It's a potential race
condition :/

>     60:     t0 = Time.now
>  => 61:     assert_raises(IOError) { Kgio.poll({@rd => Kgio::POLLIN}) }
>     62:     diff = Time.now - t0
>     63:     thr.join
>     64:     assert diff >= 0.010, "diff=#{diff}"