https://github.com/python/cpython/commit/4b7b581193073d100253bef746e9e148309514e2
commit: 4b7b581193073d100253bef746e9e148309514e2
branch: main
author: Timofei Ivankov <[email protected]>
committer: kumaraditya303 <[email protected]>
date: 2026-11-05T11:28:56+05:30
summary:
gh-161166: Fix incorrect exception line in asyncio.Task.print_stack() (#161167)
files:
A Misc/NEWS.d/next/Library/2026-11-02-13-11-30.gh-issue-161166.zfFDlW.rst
M Lib/asyncio/base_tasks.py
M Lib/test/test_asyncio/test_tasks.py
diff --git a/Lib/asyncio/base_tasks.py b/Lib/asyncio/base_tasks.py
index 2e297c6e0802be..ae5c9a514bad24 100644
--- a/Lib/asyncio/base_tasks.py
+++ b/Lib/asyncio/base_tasks.py
@@ -70,10 +70,16 @@ def _task_get_stack(task, limit):
def _task_print_stack(task, limit, file):
+ exc = task._exception
+ tb = exc.__traceback__ if exc is not None else None
extracted_list = []
checked = set()
for f in task.get_stack(limit=limit):
- lineno = f.f_lineno
+ if tb is not None:
+ lineno = tb.tb_lineno
+ tb = tb.tb_next
+ else:
+ lineno = f.f_lineno
co = f.f_code
filename = co.co_filename
name = co.co_name
@@ -83,7 +89,6 @@ def _task_print_stack(task, limit, file):
line = linecache.getline(filename, lineno, f.f_globals)
extracted_list.append((filename, lineno, name, line))
- exc = task._exception
if not extracted_list:
print(f'No stack for {task!r}', file=file)
elif exc is not None:
diff --git a/Lib/test/test_asyncio/test_tasks.py
b/Lib/test/test_asyncio/test_tasks.py
index 277b856f57a136..f16815474e2d19 100644
--- a/Lib/test/test_asyncio/test_tasks.py
+++ b/Lib/test/test_asyncio/test_tasks.py
@@ -335,6 +335,21 @@ async def runner():
self.loop.run_until_complete(runner())
+ def test_print_stack_exception_lineno(self):
+ # gh-161166
+ async def coro():
+ try:
+ 1 / 0
+ finally:
+ cleaned = True
+
+ task = self.new_task(self.loop, coro())
+ test_utils.run_briefly(self.loop)
+ task.exception()
+ file = io.StringIO()
+ task.print_stack(file=file)
+ self.assertIn(' 1 / 0\n', file.getvalue())
+
def test_get_stack_async_generator(self):
# gh-161178
async def gen():
diff --git
a/Misc/NEWS.d/next/Library/2026-11-02-13-11-30.gh-issue-161166.zfFDlW.rst
b/Misc/NEWS.d/next/Library/2026-11-02-13-11-30.gh-issue-161166.zfFDlW.rst
new file mode 100644
index 00000000000000..4d66a399f5e655
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2026-11-02-13-11-30.gh-issue-161166.zfFDlW.rst
@@ -0,0 +1,2 @@
+Fix :meth:`asyncio.Task.print_stack` displaying an incorrect exception line
+after a ``finally`` block. Patch by Timofei Ivankov.
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