bpo-33469: RuntimeError after closing loop that used run_in_executor (GH-7171)

1 files changed, 18 insertions, 0 deletions

diff --git a/Lib/test/test_asyncio/test_events.py b/Lib/test/test_asyncio/test_events.py
index ba28e8ce87..39d85e8df0 100644
--- a/Lib/test/test_asyncio/test_events.py
+++ b/Lib/test/test_asyncio/test_events.py
@@ -347,6 +347,24 @@ class EventLoopTestsMixin:
         self.assertEqual(res, 'yo')
         self.assertNotEqual(thread_id, threading.get_ident())
 
+    def test_run_in_executor_cancel(self):
+        called = False
+
+        def patched_call_soon(*args):
+            nonlocal called
+            called = True
+
+        def run():
+            time.sleep(0.05)
+
+        f2 = self.loop.run_in_executor(None, run)
+        f2.cancel()
+        self.loop.close()
+        self.loop.call_soon = patched_call_soon
+        self.loop.call_soon_threadsafe = patched_call_soon
+        time.sleep(0.4)
+        self.assertFalse(called)
+
     def test_reader_callback(self):
         r, w = socket.socketpair()
         r.setblocking(False)