https://github.com/python/cpython/commit/d619015ecd1c57bde9babc8defaf4c9f8f583be1
commit: d619015ecd1c57bde9babc8defaf4c9f8f583be1
branch: 3.14
author: Kumar Aditya <[email protected]>
committer: hugovk <[email protected]>
date: 2025-08-22T17:27:49+03:00
summary:
[3.14] gh-137384: fix crash when accessing warnings state late in runtime
shutdown (GH-138027) (#138065)
files:
A
Misc/NEWS.d/next/Core_and_Builtins/2025-08-22-11-39-40.gh-issue-137384.j4b_in.rst
M Lib/test/test_gc.py
M Python/pystate.c
diff --git a/Lib/test/test_gc.py b/Lib/test/test_gc.py
index d9e9622992f543..969d290c259f73 100644
--- a/Lib/test/test_gc.py
+++ b/Lib/test/test_gc.py
@@ -1522,6 +1522,19 @@ def test_ast_fini(self):
""")
assert_python_ok("-c", code)
+ def test_warnings_fini(self):
+ # See https://github.com/python/cpython/issues/137384
+ code = textwrap.dedent('''
+ import asyncio
+ from contextvars import ContextVar
+
+ context_loop = ContextVar("context_loop", default=None)
+ loop = asyncio.new_event_loop()
+ context_loop.set(loop)
+ ''')
+
+ assert_python_ok("-c", code)
+
def setUpModule():
global enabled, debug
diff --git
a/Misc/NEWS.d/next/Core_and_Builtins/2025-08-22-11-39-40.gh-issue-137384.j4b_in.rst
b/Misc/NEWS.d/next/Core_and_Builtins/2025-08-22-11-39-40.gh-issue-137384.j4b_in.rst
new file mode 100644
index 00000000000000..583d751a460eb6
--- /dev/null
+++
b/Misc/NEWS.d/next/Core_and_Builtins/2025-08-22-11-39-40.gh-issue-137384.j4b_in.rst
@@ -0,0 +1 @@
+Fix a crash when using the :mod:`warnings` module in a finalizer at shutdown.
Patch by Kumar Aditya.
diff --git a/Python/pystate.c b/Python/pystate.c
index aa2c4bd51814c3..02621f36d91c8a 100644
--- a/Python/pystate.c
+++ b/Python/pystate.c
@@ -914,7 +914,6 @@ interpreter_clear(PyInterpreterState *interp, PyThreadState
*tstate)
_Py_ClearExecutorDeletionList(interp);
#endif
_PyAST_Fini(interp);
- _PyWarnings_Fini(interp);
_PyAtExit_Fini(interp);
// All Python types must be destroyed before the last GC collection. Python
@@ -925,6 +924,9 @@ interpreter_clear(PyInterpreterState *interp, PyThreadState
*tstate)
_PyGC_CollectNoFail(tstate);
_PyGC_Fini(interp);
+ // Finalize warnings after last gc so that any finalizers can
+ // access warnings state
+ _PyWarnings_Fini(interp);
/* We don't clear sysdict and builtins until the end of this function.
Because clearing other attributes can execute arbitrary Python code
which requires sysdict and builtins. */
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