969     range->ar_start = -1;  in _PyLineTable_InitAddressRange()
995     while (bounds->ar_start > lasti) {  in _PyCode_CheckLineNumber()
1026     if (bounds->ar_start == 0) {  in previous_code_delta()
1074     assert(bounds->ar_start >= 0);  in retreat()
1079     bounds->ar_end = bounds->ar_start;  in retreat()
1080     bounds->ar_start -= previous_code_delta(bounds);  in retreat()
1101     bounds->ar_start = bounds->ar_end;  in advance()
1116     bounds->ar_start = bounds->ar_end;  in advance_with_locations()
1117     bounds->ar_end = bounds->ar_start + ((first_byte & 7) + 1) * sizeof(_Py_CODEUNIT);  in advance_with_locations()
1193     if (range->ar_start <= 0) {  in _PyLineTable_PreviousAddressRange()
1197     assert(range->ar_end > range->ar_start);  in _PyLineTable_PreviousAddressRange()
1208     assert(range->ar_end > range->ar_start);  in _PyLineTable_NextAddressRange()
1269             int bdelta = bounds.ar_start - code_offset;  in decode_linetable()
1275             code_offset = bounds.ar_start;  in decode_linetable()
1313     int start = bounds->ar_start;  in lineiter_next()