GH-125868: Fix STORE_ATTR_WITH_HINT specialization (GH-125876)

1 files changed, 3 insertions, 4 deletions

diff --git a/Python/generated_cases.c.h b/Python/generated_cases.c.h
index efbf2fb..f658ae5 100644
--- a/Python/generated_cases.c.h
+++ b/Python/generated_cases.c.h
@@ -7443,18 +7443,17 @@
                 assert(PyDict_CheckExact((PyObject *)dict));
                 PyObject *name = GETITEM(FRAME_CO_NAMES, oparg);
                 DEOPT_IF(hint >= (size_t)dict->ma_keys->dk_nentries, STORE_ATTR);
-                PyObject *old_value;
                 DEOPT_IF(!DK_IS_UNICODE(dict->ma_keys), STORE_ATTR);
                 PyDictUnicodeEntry *ep = DK_UNICODE_ENTRIES(dict->ma_keys) + hint;
                 DEOPT_IF(ep->me_key != name, STORE_ATTR);
+                PyObject *old_value = ep->me_value;
+                DEOPT_IF(old_value == NULL, STORE_ATTR);
                 /* Ensure dict is GC tracked if it needs to be */
                 if (!_PyObject_GC_IS_TRACKED(dict) && _PyObject_GC_MAY_BE_TRACKED(PyStackRef_AsPyObjectBorrow(value))) {
                     _PyObject_GC_TRACK(dict);
                 }
-                old_value = ep->me_value;
-                PyDict_WatchEvent event = old_value == NULL ? PyDict_EVENT_ADDED : PyDict_EVENT_MODIFIED;
                 _PyFrame_SetStackPointer(frame, stack_pointer);
-                _PyDict_NotifyEvent(tstate->interp, event, dict, name, PyStackRef_AsPyObjectBorrow(value));
+                _PyDict_NotifyEvent(tstate->interp, PyDict_EVENT_MODIFIED, dict, name, PyStackRef_AsPyObjectBorrow(value));
                 stack_pointer = _PyFrame_GetStackPointer(frame);
                 ep->me_value = PyStackRef_AsPyObjectSteal(value);
                 // old_value should be DECREFed after GC track checking is done, if not, it could raise a segmentation fault,