[ruby-core:27603] [Bug #2609] threaded tests fail in 1.9.1 on OS X 10.5

Bug #2609: threaded tests fail in 1.9.1 on OS X 10.5
http://redmine.ruby-lang.org/issues/show/2609

Author: Michal Suchanek
Status: Open, Priority: Normal
Category: core
ruby -v: ruby 1.9.1p378 (2010-01-10 revision 26273) [i386-darwin]

This is not 100% reliably reproducible but make test often fails.

OS X 10.5.8 9L30

#228 test_io.rb:11:in `<top (required)>': 
     begin
       require "io/nonblock"
       r, w = IO.pipe
       w.nonblock = true
       w.write_nonblock("a" * 100000)
       w.nonblock = false
       t1 = Thread.new { w.write("b" * 4096) }
       t2 = Thread.new { w.write("c" * 4096) }
       sleep 0.5
       r.sysread(4096).length
       sleep 0.5
       r.sysread(4096).length
       t1.join
       t2.join
     rescue LoadError
     end
  #=> not finished in 10 seconds  [ruby-dev:32566]

another test failing less often - also thread related.

#921 test_thread.rb:191:in `<top (required)>': 
   begin
     100.times do |i|
       begin
         Thread.start(Thread.current) {|u| u.raise }
         raise
       rescue
       ensure
       end
     end
   rescue
     100
   end
  #=> "" (expected "100")  [ruby-dev:31371]
FAIL 1/945 tests failed


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