Following discussion in #4386, this is a more specific check requested by @bluca rather than a catch-all. Only failures up to the initial bind are considered for fallback to tcpip.
I can't reproduce the error, so I don't know exactly what errno to check for to make the condition even more specific.
Also adds the missing check of the returned rc from make_fd_pair, which should have raised the actual error instead of the cryptic src\epoll.cpp:100 reported in https://github.com/zeromq/pyzmq/issues/1505
closes #4386
Following discussion in #4386, this is a more specific check requested by @bluca rather than a catch-all. Only failures up to the initial bind are considered for fallback to tcpip.
I can't reproduce the error, so I don't know exactly what errno to check for to make the condition even more specific.
Also adds the missing check of the returned rc from make_fd_pair, which should have raised the actual error instead of the cryptic
src\epoll.cpp:100reported in https://github.com/zeromq/pyzmq/issues/1505