external/libvisio/ubsan.patch

   1 --- src/lib/VSDContentCollector.cpp
   2 +++ src/lib/VSDContentCollector.cpp
   3 @@ -3220,7 +3220,7 @@
   4      }
   5      if (U_SUCCESS(status) && conv)
   6      {
   7 -      const char *src = (const char *)&characters[0];
   8 +      const char *src = (const char *)characters.data();
   9        const char *srcLimit = (const char *)src + characters.size();
  10        while (src < srcLimit)
  11        {
  12 @@ -3285,6 +3285,7 @@
  13    _handleLevelChange(level);
  14    librevenge::RVNGString text;
  15    std::vector<unsigned char> tmpData(layerMem.m_data.size());
  16 +  if (!layerMem.m_data.empty())
  17    memcpy(&tmpData[0], layerMem.m_data.getDataBuffer(), layerMem.m_data.size());
  18    appendCharacters(text, tmpData, layerMem.m_format);
  19