Fix Property GC tracking for Python 3.11

The GC was not untracked when PySide Property was deleted.
This was found by the new deeper error tracking in debug Python 3.11 .

Fixes: PYSIDE-1960
Change-Id: I5ecdfb88529c22a44575ca9460d6753b1e389079
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
(cherry picked from commit ace680f4c5fc8564df9daaa41bf8779c9fffa671)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/sources/pyside6/libpyside/pysideproperty.cpp b/sources/pyside6/libpyside/pysideproperty.cpp
index 5e68253d8..b9f788b61 100644
--- a/sources/pyside6/libpyside/pysideproperty.cpp
+++ b/sources/pyside6/libpyside/pysideproperty.cpp
@@ -103,6 +103,7 @@ static PyType_Slot PySidePropertyType_slots[] = {
     {Py_tp_init, reinterpret_cast<void *>(qpropertyTpInit)},
     {Py_tp_new, reinterpret_cast<void *>(qpropertyTpNew)},
     {Py_tp_getset, PySidePropertyType_getset},
+    {Py_tp_del, reinterpret_cast<void *>(PyObject_GC_Del)},
     {0, nullptr}
 };
 
@@ -271,6 +272,7 @@ static void qpropertyDeAlloc(PyObject *self)
         // This was not needed before Python 3.8 (Python issue 35810)
         Py_DECREF(Py_TYPE(self));
     }
+    PyObject_GC_UnTrack(self);
     Py_TYPE(self)->tp_free(self);
 }