Try to fix race in rb_thread_call_without_gvl spec
Try to fix race in rb_thread_call_without_gvl spec

eregon/rubyspec,nobu/rubyspec,sgarciac/spec,eregon/rubyspec,ruby/rubyspec,ruby/spec,nobu/rubyspec,nobu/rubyspec,ruby/spec,sgarciac/spec,eregon/rubyspec,ruby/rubyspec,sgarciac/spec,ruby/spec