do not allow _PyGen_Finalize to fail (closes #27811)
Patch from Armin Rigo.
diff --git a/Lib/test/test_coroutines.py b/Lib/test/test_coroutines.py
index d0cefb0..79cbec9 100644
--- a/Lib/test/test_coroutines.py
+++ b/Lib/test/test_coroutines.py
@@ -1565,6 +1565,14 @@
finally:
aw.close()
+ def test_fatal_coro_warning(self):
+ # Issue 27811
+ async def func(): pass
+ with warnings.catch_warnings():
+ warnings.filterwarnings("error")
+ func()
+ support.gc_collect()
+
class CoroAsyncIOCompatTest(unittest.TestCase):
diff --git a/Misc/NEWS b/Misc/NEWS
index 90f0bdd..8558db4 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -10,6 +10,9 @@
Core and Builtins
-----------------
+- Issue #27811: Fix a crash when a coroutine that has not been awaited is
+ finalized with warnings-as-errors enabled.
+
- Issue #27587: Fix another issue found by PVS-Studio: Null pointer check
after use of 'def' in _PyState_AddModule().
Initial patch by Christian Heimes.
diff --git a/Objects/genobject.c b/Objects/genobject.c
index b3e0a46..a9ea5c2 100644
--- a/Objects/genobject.c
+++ b/Objects/genobject.c
@@ -24,18 +24,6 @@
PyObject *res;
PyObject *error_type, *error_value, *error_traceback;
- /* If `gen` is a coroutine, and if it was never awaited on,
- issue a RuntimeWarning. */
- if (gen->gi_code != NULL
- && ((PyCodeObject *)gen->gi_code)->co_flags & CO_COROUTINE
- && gen->gi_frame != NULL
- && gen->gi_frame->f_lasti == -1
- && !PyErr_Occurred()
- && PyErr_WarnFormat(PyExc_RuntimeWarning, 1,
- "coroutine '%.50S' was never awaited",
- gen->gi_qualname))
- return;
-
if (gen->gi_frame == NULL || gen->gi_frame->f_stacktop == NULL)
/* Generator isn't paused, so no need to close */
return;
@@ -43,7 +31,20 @@
/* Save the current exception, if any. */
PyErr_Fetch(&error_type, &error_value, &error_traceback);
- res = gen_close(gen, NULL);
+ /* If `gen` is a coroutine, and if it was never awaited on,
+ issue a RuntimeWarning. */
+ if (gen->gi_code != NULL
+ && ((PyCodeObject *)gen->gi_code)->co_flags & CO_COROUTINE
+ && gen->gi_frame->f_lasti == -1
+ && !PyErr_Occurred()
+ && PyErr_WarnFormat(PyExc_RuntimeWarning, 1,
+ "coroutine '%.50S' was never awaited",
+ gen->gi_qualname)) {
+ res = NULL; /* oops, exception */
+ }
+ else {
+ res = gen_close(gen, NULL);
+ }
if (res == NULL)
PyErr_WriteUnraisable(self);