From: Lucas Nussbaum <redmine@...>
Date: 2010-03-09T17:30:43+09:00
Subject: [ruby-core:28574] [Bug #2739] ruby 1.8.7 built with pthreads hangs under some circumstances

Issue #2739 has been updated by Lucas Nussbaum.


No, I don't see any improvement with 24402.

I'm using that test case:
<-------
#!/usr/bin/ruby1.8

system("/usr/bin/touch /tmp/7777")
puts "executed without timeout ok"
require 'timeout'
status = Timeout::timeout(1) {
system("/usr/bin/touch /tmp/7777")
}
puts "executed with timeout ok\n"
--------------->
And that test runner, that I execute with ruby 1.9.1 to avoid conflicts:
<-------------
errs = 0
1.upto(100).each do |i|
  system("ruby1.8 t.rb")
  if $?.termsig == 2
    errs += 1
  end
end
puts errs
--------------->

Compiling various revisions from the 1_8 branch, I get the following results:
rev 23262: 100 successes

rev 23268: blocks, not killable with killall ruby1.9 (needs -9) (0 successes)

rev 24394: 29 successes, 71 failures
doesn't block anymore, but raises an exception:
/usr/lib/ruby/1.8/timeout.rb:60: execution expired (Timeout::Error)
	from ../t.rb:6

rev 24402: 24 successes, 76 failures
(same behaviour as r24394)

rev 26851: 24 successes, 76 failures
(same behaviour as r24394)
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http://redmine.ruby-lang.org/issues/show/2739

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