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bpo-38070: visit_decref() calls _PyObject_IsFreed() (GH-15782)

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In debug mode, visit_decref() now calls _PyObject_IsFreed() to ensure
that the object is not freed. If it's freed, the program fails with
an assertion error and Python dumps informations about the freed
object.
(cherry picked from commit d91d4de317)

Co-authored-by: Victor Stinner <vstinner@redhat.com>
This commit is contained in:
Miss Islington (bot) 2019-09-09 10:18:09 -07:00 • committed by GitHub
parent 2d5594fac2
commit 5731172bb1
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Modules/gcmodule.c
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@ -376,6 +376,8 @@ static int
visit_decref(PyObject *op, void *data)
{
assert(op != NULL);
_PyObject_ASSERT(op, !_PyObject_IsFreed(op));
if (PyObject_IS_GC(op)) {
PyGC_Head *gc = AS_GC(op);
/* We're only interested in gc_refs for objects in the