commit 09cc169a03f865d7ff68e49be01ea9d3588c96de
author Yury Selivanov <yselivanov@sprymix.com> Tue Apr 15 12:01:16 2014 -0400
committer Yury Selivanov <yselivanov@sprymix.com> Tue Apr 15 12:01:16 2014 -0400
tree ff148433e460c3de22ad863ae54afd434fab1cfe
parent 809f90f36905e7623eb98bf216c078a90a4090bd

asyncio.tasks: Make sure CoroWrapper.send proxies one argument correctly

Issue #21209.

Lib/asyncio/tasks.py

diff --git a/Lib/asyncio/tasks.py b/Lib/asyncio/tasks.py
index 0366da3..0785e10 100644
--- a/Lib/asyncio/tasks.py
+++ b/Lib/asyncio/tasks.py
@@ -53,6 +53,8 @@
         # We use `*value` because of a bug in CPythons prior
         # to 3.4.1. See issue #21209 and test_yield_from_corowrapper
         # for details.  This workaround should be removed in 3.5.0.
+        if len(value) == 1:
+            value = value[0]
         return self.gen.send(value)
 
     def throw(self, exc):