decompress_R2004_section have a bug

[Dylan-H]

#ifdef NDEBUG
      memmove (&dec->chain[pos], &dec->chain[pos - comp_offset], comp_bytes);
#else
      for (; pos < end; pos++)
        {
          unsigned char b;
          assert ((long)pos >= (long)comp_offset);
          assert (pos - comp_offset < dec->size);
          b = dec->chain[pos - comp_offset];
          assert (pos < dec->size);
          dec->chain[pos] = b;
        }
#endif

In Release mode, the behavior of memmove is not equivalent to the following code.
The result in Debug mode at the same location is as shown below

In the same position Release mode the result is as follows

[JulianMariaCoccaro1030]

#ifdef NDEBUG
memmove (&dec->chain[pos], &dec->chain[pos - comp_offset], comp_bytes);
#else

This is the issue.
Today I reported a issue and it was due to this error.
If I disable NDEBUG in release mode, my issue is getting sloved.
Rurban, I think you can fix it shortly.
Thanks for reporting this issue, Dylan.