Merge 3.5 (issue #28372)

Lib/asyncio/coroutines.py

@@ -261,6 +261,25 @@ def iscoroutine(obj):
 def _format_coroutine(coro):
     assert iscoroutine(coro)
 
+    if not hasattr(coro, 'cr_code') and not hasattr(coro, 'gi_code'):
+        # Most likely a Cython coroutine.
+        coro_name = getattr(coro, '__qualname__', coro.__name__)
+        coro_name = '{}()'.format(coro_name)
+
+        running = False
+        try:
+            running = coro.cr_running
+        except AttributeError:
+            try:
+                running = coro.gi_running
+            except AttributeError:
+                pass
+
+        if running:
+            return '{} running'.format(coro_name)
+        else:
+            return coro_name
+
     coro_name = None
     if isinstance(coro, CoroWrapper):
         func = coro.func