Fix bad spec using racy behavior and killing a thread for no good reason.
Fix bad spec using racy behavior and killing a thread for no good reason.

eregon/rubyspec,benlovell/rubyspec,sgarciac/spec,lucaspinto/rubyspec,askl56/rubyspec,jannishuebl/rubyspec,yous/rubyspec,nobu/rubyspec,nobu/rubyspec,kidaa/rubyspec,ruby/spec,nobu/rubyspec,BanzaiMan/rubyspec,iliabylich/rubyspec,bl4ckdu5t/rubyspec,benlovell/rubyspec,eregon/rubyspec,kachick/rubyspec,jannishuebl/rubyspec,wied03/rubyspec,sgarciac/spec,iliabylich/rubyspec,lucaspinto/rubyspec,kachick/rubyspec,askl56/rubyspec,ruby/spec,ruby/spec,sgarciac/spec,wied03/rubyspec,bl4ckdu5t/rubyspec,ruby/rubyspec,wied03/rubyspec,BanzaiMan/rubyspec,kidaa/rubyspec,ruby/rubyspec,eregon/rubyspec,yous/rubyspec,kachick/rubyspec