PVS-Studio warning V509 for TortoiseSVN

CCacheFileOutBuffer::~CCacheFileOutBuffer()
{
  if (IsOpen())
  {
    streamOffsets.push_back (GetFileSize());
    size_t lastOffset = streamOffsets[0];
    for (size_t i = 1,
         count = streamOffsets.size();
         i < count; ++i)
    {
      size_t offset = streamOffsets[i];
      size_t size = offset - lastOffset;

      if (size >= (DWORD)(-1))
        throw CStreamException("stream too large");

      Add ((DWORD)size);
      lastOffset = offset;
    }

    Add ((DWORD)(streamOffsets.size()-1));
  }
}

This suspicious code was found in TortoiseSVN project by PVS-Studio static code analyzer.
Warning message is:
V509 The 'throw' operator inside the destructor should be placed within the try..catch block. Raising exception inside the destructor is illegal. cachefileoutbuffer.cpp 52

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