guard/guard — pull request #486 by cablegram (2013-09-29 17:32:58+00:00)
Title: Accommodate differences in Thread class under MRI 1.9.3, MRI 2.0.0 and jruby

On a newly killed thread, Thread#alive? behaves differently under MRI 2.0.0 than under MRI 1.9.3, and jruby and Thread#status behaves differently under jruby than under MRI 1.9.3, and MRI 2.0.0.

t=Thread.new{}.kill; puts "#{t.alive?}--#{t.status}"

On MRI 1.9.3 => true--aborting
On MRI 2.0.0 => true--run
On jruby => false--aborting