PyThreadState_GET() complains if the tstate is NULL, but only in debug mode.
/* We can arrive here with a NULL tstate during initialization:
try running "python -Wi" for an example related to string
interning. Let's just hope that no exception occurs then... */
- tstate = PyThreadState_GET();
+ tstate = _PyThreadState_Current;
if (tstate != NULL && tstate->curexc_type != NULL) {
/* preserve the existing exception */
PyObject *err_type, *err_value, *err_tb;