We have detected that RowReader::NarrowWideThreshold() sometimes reads beyond the data provided by view.
Steps to reproduce:

1. Adapt ZXingQtReader.cpp to the following:

  auto options = ReaderOptions()
  			 .setTryDownscale(false)
  			 .setTryInvert(false)
  			 .setTextMode(TextMode::HRI)
  			 .setMaxNumberOfSymbols(1);

2. Add assert(view.isValid()); right to the beginning of RowReader::NarrowWideThreshold() (i.e. line 150 in ODRowReader.h)
3. Build ZXingQtReader and run it with the attached image
4. The assert is fired when ITFReader::decodePattern() is called with rowNumber=1560. Then next._size is 4, next._end-next._data is 12, and thus next.subView(4, 10) creates a view extending 2 bytes beyond next._end.