_handle_exception in testing.py ignores passed exception

diff --git a/tornado/testing.py b/tornado/testing.py
index 61c8430611edb028dfc77b61c959179b58248218..5d8f6342eca157435d73a9602ee6622b7a469f4b 100644 (file)
--- a/tornado/testing.py
+++ b/tornado/testing.py
@@ -169,7 +169,7 @@ class AsyncTestCase(unittest.TestCase):
         return IOLoop()
 
     def _handle_exception(self, typ, value, tb):
-        self.__failure = sys.exc_info()
+        self.__failure = (typ, value, tb)
         self.stop()
         return True