bpo-31620: have asyncio/queues not leak memory when you've exceptions during waiting (#3813)
diff --git a/Lib/asyncio/queues.py b/Lib/asyncio/queues.py
index 2d38972..1c66d67 100644
--- a/Lib/asyncio/queues.py
+++ b/Lib/asyncio/queues.py
@@ -167,6 +167,12 @@
yield from getter
except:
getter.cancel() # Just in case getter is not done yet.
+
+ try:
+ self._getters.remove(getter)
+ except ValueError:
+ pass
+
if not self.empty() and not getter.cancelled():
# We were woken up by put_nowait(), but can't take
# the call. Wake up the next in line.
diff --git a/Lib/test/test_asyncio/test_queues.py b/Lib/test/test_asyncio/test_queues.py
index fe5a6db..2137cde 100644
--- a/Lib/test/test_asyncio/test_queues.py
+++ b/Lib/test/test_asyncio/test_queues.py
@@ -295,6 +295,23 @@
loop=self.loop),
)
+ def test_cancelled_getters_not_being_held_in_self_getters(self):
+ def a_generator():
+ yield 0.1
+ yield 0.2
+
+ self.loop = self.new_test_loop(a_generator)
+ @asyncio.coroutine
+ def consumer(queue):
+ try:
+ item = yield from asyncio.wait_for(queue.get(), 0.1, loop=self.loop)
+ except asyncio.TimeoutError:
+ pass
+
+ queue = asyncio.Queue(loop=self.loop, maxsize=5)
+ self.loop.run_until_complete(self.loop.create_task(consumer(queue)))
+ self.assertEqual(len(queue._getters), 0)
+
class QueuePutTests(_QueueTestBase):