test long_dealloc as well

Objects/longobject.c

@@ -3646,18 +3646,18 @@ _PyLong_ExactDealloc(PyObject *self)
 static void
 long_dealloc(PyObject *self)
 {
-#ifndef Py_GIL_DISABLED
     if (_long_is_small_int(self)) {
         /* This should never get called, but we also don't want to SEGV if
          * we accidentally decref small Ints out of existence. Instead,
          * since small Ints are immortal, re-set the reference count.
          *
          * See PEP 683, section Accidental De-Immortalizing for details
          */
+        printf("rare event: dealloc of small int\n");
+        exit(1);
         _Py_SetImmortal(self);
         return;
     }
-#endif
     if (PyLong_CheckExact(self) && _PyLong_IsCompact((PyLongObject *)self)) {
         _Py_FREELIST_FREE(ints, self, PyObject_Free);
         return;