diff -r a1daf32d920e Lib/asyncio/tasks.py
--- a/Lib/asyncio/tasks.py	Fri Aug 14 02:07:41 2015 -0700
+++ b/Lib/asyncio/tasks.py	Fri Aug 14 16:14:59 2015 +0100
@@ -128,7 +128,8 @@
         returned for a suspended coroutine.
         """
         frames = []
-        f = self._coro.gi_frame
+        f = (self._coro.gi_frame if hasattr(self._coro, 'gi_frame') 
+             else self._coro.cr_frame)
         if f is not None:
             while f is not None:
                 if limit is not None: