https://github.com/python/cpython/commit/b0da7c72691d9a165f7849099aee1a9cc7299fc1
commit: b0da7c72691d9a165f7849099aee1a9cc7299fc1
branch: main
author: Timofei Ivankov <[email protected]>
committer: kumaraditya303 <[email protected]>
date: 2026-08-29T21:57:05+05:30
summary:
gh-156327: Fix asyncio.print_call_graph() reporting its own frame (#156329)
files:
A Misc/NEWS.d/next/Library/2026-08-24-22-20-55.gh-issue-156327.arC8Ph.rst
M Lib/asyncio/graph.py
M Lib/test/test_asyncio/test_graph.py
diff --git a/Lib/asyncio/graph.py b/Lib/asyncio/graph.py
index e240c6dd77d124..94fcd33d7088a6 100644
--- a/Lib/asyncio/graph.py
+++ b/Lib/asyncio/graph.py
@@ -274,4 +274,5 @@ def print_call_graph(
limit: int | None = None,
) -> None:
"""Print the async call graph for the current task or the provided
Future."""
- print(format_call_graph(future, depth=depth, limit=limit), file=file)
+ # gh-156327: print_call_graph() must not report its own frame
+ print(format_call_graph(future, depth=depth + 1, limit=limit), file=file)
diff --git a/Lib/test/test_asyncio/test_graph.py
b/Lib/test/test_asyncio/test_graph.py
index 2c5bb2e8f52e66..50d528fb9fb2c5 100644
--- a/Lib/test/test_asyncio/test_graph.py
+++ b/Lib/test/test_asyncio/test_graph.py
@@ -41,7 +41,7 @@ def walk(s):
return ret
buf = io.StringIO()
- asyncio.print_call_graph(fut, file=buf, depth=depth+1)
+ asyncio.print_call_graph(fut, file=buf, depth=depth)
stack = asyncio.capture_call_graph(fut, depth=depth)
return walk(stack), buf.getvalue()
@@ -484,6 +484,14 @@ def test_capture_call_graph_non_future(self):
with self.assertRaises(TypeError):
asyncio.capture_call_graph("not a future")
+ async def test_print_call_graph_innermost_frame(self):
+ # gh-156327: print_call_graph() must not report its own frame
+ buf = io.StringIO()
+ lineno = sys._getframe().f_lineno + 1
+ asyncio.print_call_graph(file=buf)
+ first_frame = buf.getvalue().splitlines()[2]
+ self.assertIn(f'File {__file__!r}, line {lineno},', first_frame)
+
async def test_call_graph_finished_task(self):
# gh-156408: the call graph must not record a finished coroutine's
None frame
async def boom():
diff --git
a/Misc/NEWS.d/next/Library/2026-08-24-22-20-55.gh-issue-156327.arC8Ph.rst
b/Misc/NEWS.d/next/Library/2026-08-24-22-20-55.gh-issue-156327.arC8Ph.rst
new file mode 100644
index 00000000000000..979db7a733a3ea
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2026-08-24-22-20-55.gh-issue-156327.arC8Ph.rst
@@ -0,0 +1,2 @@
+Fix :func:`asyncio.print_call_graph` including its own frame in the printed
+call stack.
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