Handle variable definition through out parameters

Author: markshannon

Python/bytecodes.c

@@ -2237,7 +2237,8 @@ dummy_func(
             PyObject *attr_o = FT_ATOMIC_LOAD_PTR_ACQUIRE(*value_ptr);
             DEOPT_IF(attr_o == NULL);
             #ifdef Py_GIL_DISABLED
-            if (!_Py_TryIncrefCompareStackRef(value_ptr, attr_o, &attr)) {
+            int increfed = _Py_TryIncrefCompareStackRef(value_ptr, attr_o, &attr);
+            if (!increfed) {
                 DEOPT_IF(true);
             }
             #else