From 91b87b34195c39f14396b0285b38cea1971ea3d1 Mon Sep 17 00:00:00 2001
From: Timofey Ivankov <playboicartina@gmail.com>
Date: Mon, 2 Nov 2026 16:29:09 +0300
Subject: [PATCH 1/2] gh-161178: Fix missing async generator frames in
 Task.print_stack()

---
 Lib/asyncio/base_tasks.py                     |  6 +++-
 Lib/test/test_asyncio/test_tasks.py           | 34 +++++++++++++++++++
 ...-11-02-16-28-11.gh-issue-161178.D3-23R.rst |  2 ++
 3 files changed, 41 insertions(+), 1 deletion(-)
 create mode 100644 Misc/NEWS.d/next/Library/2026-11-02-16-28-11.gh-issue-161178.D3-23R.rst

diff --git a/Lib/asyncio/base_tasks.py b/Lib/asyncio/base_tasks.py
index c907b6834137325..831ef1b63704e23 100644
--- a/Lib/asyncio/base_tasks.py
+++ b/Lib/asyncio/base_tasks.py
@@ -42,8 +42,12 @@ def _task_get_stack(task, limit):
     elif hasattr(task._coro, 'ag_frame'):
         # case 3: async generators
         f = task._coro.ag_frame
+    # gh-161178: async gens should not be missed
+    elif not task.done() and hasattr(task._coro, 'aga_gen'):
+        # case 4: pending async generator operations
+        f = task._coro.aga_gen.ag_frame
     else:
-        # case 4: unknown objects
+        # case 5: unknown objects
         f = None
     if f is not None:
         while f is not None:
diff --git a/Lib/test/test_asyncio/test_tasks.py b/Lib/test/test_asyncio/test_tasks.py
index d4d3863923e79e6..277b856f57a1363 100644
--- a/Lib/test/test_asyncio/test_tasks.py
+++ b/Lib/test/test_asyncio/test_tasks.py
@@ -335,6 +335,40 @@ async def runner():
 
         self.loop.run_until_complete(runner())
 
+    def test_get_stack_async_generator(self):
+        # gh-161178
+        async def gen():
+            try:
+                yield
+            except ValueError:
+                pass
+            finally:
+                await asyncio.sleep(0)
+            yield
+
+        async def runner(method, args):
+            agen = gen()
+            await anext(agen)
+            task = self.new_task(self.loop, getattr(agen, method)(*args))
+            await asyncio.sleep(0)
+            frame = agen.ag_frame
+            stack = task.get_stack()
+            await task
+            try:
+                self.assertEqual(stack, [frame])
+                self.assertEqual(task.get_stack(), [])
+            finally:
+                await agen.aclose()
+
+        for method, args in (
+            ('__anext__', ()),
+            ('asend', (None,)),
+            ('athrow', (ValueError(),)),
+            ('aclose', ()),
+        ):
+            with self.subTest(method=method):
+                self.loop.run_until_complete(runner(method, args))
+
     def test_task_repr(self):
         self.loop.set_debug(False)
 
diff --git a/Misc/NEWS.d/next/Library/2026-11-02-16-28-11.gh-issue-161178.D3-23R.rst b/Misc/NEWS.d/next/Library/2026-11-02-16-28-11.gh-issue-161178.D3-23R.rst
new file mode 100644
index 000000000000000..1130fbe95ba0190
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2026-11-02-16-28-11.gh-issue-161178.D3-23R.rst
@@ -0,0 +1,2 @@
+Fix :meth:`asyncio.Task.print_stack` to include frames from async generator
+operations. Patch by Timofei Ivankov

From 03db5d9e9f6de4f0e78a2a43e902a9433ca270af Mon Sep 17 00:00:00 2001
From: Kumar Aditya <kumaraditya@python.org>
Date: Mon, 2 Nov 2026 19:25:22 +0530
Subject: [PATCH 2/2] Update Lib/asyncio/base_tasks.py

---
 Lib/asyncio/base_tasks.py | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/Lib/asyncio/base_tasks.py b/Lib/asyncio/base_tasks.py
index 831ef1b63704e23..2e297c6e0802bea 100644
--- a/Lib/asyncio/base_tasks.py
+++ b/Lib/asyncio/base_tasks.py
@@ -42,9 +42,8 @@ def _task_get_stack(task, limit):
     elif hasattr(task._coro, 'ag_frame'):
         # case 3: async generators
         f = task._coro.ag_frame
-    # gh-161178: async gens should not be missed
     elif not task.done() and hasattr(task._coro, 'aga_gen'):
-        # case 4: pending async generator operations
+        # case 4: async generator's asend/athrow/aclose
         f = task._coro.aga_gen.ag_frame
     else:
         # case 5: unknown objects