Watchdog blocks eventlet/Flask from running in debug mode.

Simply having watchdog installed causes flask+eventlet to hang. I've filed this issue on eventlet, but I'm not sure where it belongs.
eventlet issue: https://github.com/eventlet/eventlet/issues/634

There was  previous issue here related to eventlet:
previous watchdog issue: https://github.com/gorakhargosh/watchdog/issues/332