SplashBitmap::~SplashBitmap() {
  if (rowSize < 0) {
    gfree(data + (height - 1) * rowSize);
  } else {
    gfree(data);
  }
  gfree(alpha);
}

This weakness involves numeric computation errors, such as integer overflows, underflows, or precision losses, which can lead to miscalculations and exploitable behaviors in software.