`tlXMLParser.cc:94:read(...,...) return -1` but `read(...)` returns `size_t`, which is unsigned, so this line is broken.

[shamefulCake1]

The code is the following:

  size_t read (char *data, size_t n)
  {
    try {

      if (mp_progress.get ()) {
        mp_progress->set (mp_stream->pos ());
      }

      size_t n0 = n;
      for (const char *rd = 0; n > 0 && (rd = mp_stream->get (1)) != 0; --n) {
        *data++ = *rd;
      }

      if (n0 == n) {
        return -1;
      } else {
        return n0 - n;
      }

    } catch (tl::Exception &ex) {
      m_error = ex.msg ();
      m_has_error = true;
      return -1;
    }
  }

The return type of read is size_t, which cannot be negative.
return -1 is therefore equal to return UINT_MAX.

I think throwing an exception is better.

[klayoutmatthias]

This is only for EXPAT binding, but it is worth fixing it.

Thanks.

Matthias