From 0058ed803d611d1d585f7d96b80c3b0586f64560 Mon Sep 17 00:00:00 2001
From: GeorgianaElena <georgiana.dolocan@gmail.com>
Date: Thu, 22 Aug 2019 15:06:08 +0300
Subject: [PATCH] Address feedback

---
 jupyterhub/handlers/pages.py | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/jupyterhub/handlers/pages.py b/jupyterhub/handlers/pages.py
index 68264afc..53525dc8 100644
--- a/jupyterhub/handlers/pages.py
+++ b/jupyterhub/handlers/pages.py
@@ -175,16 +175,14 @@ class SpawnHandler(BaseHandler):
             done, pending = await asyncio.wait([f], timeout=1)
             # If spawn_single_user throws an exception, raise a 500 error
             # otherwise it may cause a redirect loop
-            if f in done:
-                future, = done
-                exc = future.exception()
+            if f.done() and f.exception():
+                exc = f.exception()
                 if exc:
                     raise web.HTTPError(
                         500,
                         "Error in Authenticator.pre_spawn_start: %s %s"
                         % (type(exc).__name__, str(exc)),
                     )
-                    return
             self.redirect(pending_url)
 
     @web.authenticated