1006     if (state->last_str) {  in FstringParser_check_invariants()
1007         assert(PyUnicode_CheckExact(state->last_str));  in FstringParser_check_invariants()
1016     state->last_str = NULL;  in _PyPegen_FstringParser_Init()
1027     Py_XDECREF(state->last_str);  in _PyPegen_FstringParser_Dealloc()
1072     if (!state->last_str) {  in _PyPegen_FstringParser_ConcatAndDel()
1074         state->last_str = str;  in _PyPegen_FstringParser_ConcatAndDel()
1077         PyUnicode_AppendAndDel(&state->last_str, str);  in _PyPegen_FstringParser_ConcatAndDel()
1078         if (!state->last_str) {  in _PyPegen_FstringParser_ConcatAndDel()
1141         if (!state->last_str) {  in _PyPegen_FstringParser_ConcatFstring()
1145             expr_ty last_str = make_str_node_and_del(p, &state->last_str, first_token, last_token);  in _PyPegen_FstringParser_ConcatFstring()  local
1146             if (!last_str || ExprList_Append(&state->expr_list, last_str) < 0) {  in _PyPegen_FstringParser_ConcatFstring()
1186         if (!state->last_str) {  in _PyPegen_FstringParser_Finish()
1188             state->last_str = PyUnicode_FromStringAndSize(NULL, 0);  in _PyPegen_FstringParser_Finish()
1189             if (!state->last_str) {  in _PyPegen_FstringParser_Finish()
1193         return make_str_node_and_del(p, &state->last_str, first_token, last_token);  in _PyPegen_FstringParser_Finish()
1198     if (state->last_str) {  in _PyPegen_FstringParser_Finish()
1199         expr_ty str = make_str_node_and_del(p, &state->last_str, first_token, last_token);  in _PyPegen_FstringParser_Finish()
1205     assert(state->last_str == NULL);  in _PyPegen_FstringParser_Finish()