merge revision(s) 44583: [Backport #9302]
* ext/thread/thread.c (rb_szqueue_push): check GET_SZQUEUE_WAITERS instead of GET_QUEUE_WAITERS to prevent deadlock. Patch by Eric Wong. [Bug #9302] [ruby-core:59324] * test/thread/test_queue.rb: add test
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_1@44847 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merge revision(s) 44583: [Backport #9302]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_1@44847 b2dd03c8-39d4-4d8f-98ff-823fe69b080e