bpo-46672: fix `NameError` in `asyncio.gather` if type check fails (GH-31187) (GH-31440)

Co-authored-by: Alex Waygood <Alex.Waygood@Gmail.com>
(cherry picked from commit 4ab8167b9c60d1a04b2e3116d0c52db254b68cda)

Co-authored-by: Nikita Sobolev <mail@sobolevn.me>

Co-authored-by: Nikita Sobolev <mail@sobolevn.me>

1 files changed, 14 insertions, 0 deletions

diff --git a/Lib/test/test_asyncio/test_tasks.py b/Lib/test/test_asyncio/test_tasks.py
index 4782c92a7c..398b143d2d 100644
--- a/Lib/test/test_asyncio/test_tasks.py
+++ b/Lib/test/test_asyncio/test_tasks.py
@@ -3593,6 +3593,20 @@ class CoroutineGatherTests(GatherTestsBase, test_utils.TestCase):
         test_utils.run_briefly(self.one_loop)
         self.assertIsInstance(f.exception(), RuntimeError)
 
+    def test_issue46672(self):
+        with mock.patch(
+            'asyncio.base_events.BaseEventLoop.call_exception_handler',
+        ):
+            async def coro(s):
+                return s
+            c = coro('abc')
+
+            with self.assertRaises(TypeError):
+                self._gather(c, {})
+            self._run_loop(self.one_loop)
+            # NameError should not happen:
+            self.one_loop.call_exception_handler.assert_not_called()
+
 
 class RunCoroutineThreadsafeTests(test_utils.TestCase):
     """Test case for asyncio.run_coroutine_threadsafe."""