Ruby

merge revision(s) 58534: [Backport #13533]

    nogvl_wait_for_single_fd must wait as its name

    poll(fds, n, 0) mean no timeout and immediately return. If you want to
    wait something, you need to use -1 instead.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_4@58622 b2dd03c8-39d4-4d8f-98ff-823fe69b080e