concurrent: Fix importability of tornado.wsgi on app engine

2018-01-21 20:12:06 -05:00 · 2018-01-21 20:12:06 -05:00 · 6e8a137e68
parent 606f0b5e90
commit 6e8a137e68
1 changed files with 6 additions and 5 deletions
--- a/tornado/concurrent.py
+++ b/tornado/concurrent.py
@ -337,6 +337,7 @@ class Future(object):

    def _set_done(self):
        self._done = True
+        if self._callbacks:
            from tornado.ioloop import IOLoop
            loop = IOLoop.current()
            for cb in self._callbacks: