.

wcfs/wcfs_test.py

@@ -423,6 +423,9 @@ class tWatch:
         # ask wcfs to close its tx & rx sides; close(wcfs.tx) wakes up
         # _serveRecv on client (= on us).
         t._send(1, b'bye')
+        # XXX we can get stuck here if wcfs does not behave as we want.
+        # XXX in particular if there is a silly - e.g. syntax or type error in
+        #     test code - we curently get stuck here.
         t._serveDone.recv()
 
         t.wtx.close()