Issue #12483: ctypes: Fix a crash when the destruction of a callback
object triggers the garbage collector.
diff --git a/Lib/ctypes/test/test_callbacks.py b/Lib/ctypes/test/test_callbacks.py
index 621a019..901456d 100644
--- a/Lib/ctypes/test/test_callbacks.py
+++ b/Lib/ctypes/test/test_callbacks.py
@@ -140,6 +140,14 @@
if isinstance(x, X)]
self.assertEqual(len(live), 0)
+ def test_issue12483(self):
+ import gc
+ class Nasty:
+ def __del__(self):
+ gc.collect()
+ CFUNCTYPE(None)(lambda x=Nasty(): None)
+
+
try:
WINFUNCTYPE
except NameError:
diff --git a/Misc/NEWS b/Misc/NEWS
index 41328fd..7984e17 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -192,6 +192,9 @@
Extension Modules
-----------------
+- Issue #12483: ctypes: Fix a crash when the destruction of a callback
+ object triggers the garbage collector.
+
- Issue #12950: Fix passing file descriptors in multiprocessing, under
OpenIndiana/Illumos.
diff --git a/Modules/_ctypes/callbacks.c b/Modules/_ctypes/callbacks.c
index 2b54a85..47dbe05 100644
--- a/Modules/_ctypes/callbacks.c
+++ b/Modules/_ctypes/callbacks.c
@@ -18,6 +18,7 @@
CThunkObject_dealloc(PyObject *_self)
{
CThunkObject *self = (CThunkObject *)_self;
+ PyObject_GC_UnTrack(self);
Py_XDECREF(self->converters);
Py_XDECREF(self->callable);
Py_XDECREF(self->restype);