in lib/src/eager_span_scanner.dart [32:41]
set state(LineScannerState state) {
if (state is! _EagerSpanScannerState || !identical(state._scanner, this)) {
throw ArgumentError('The given LineScannerState was not returned by '
'this LineScanner.');
}
super.position = state.position;
_line = state.line;
_column = state.column;
}