TMemoryBuffer buffer may overflow when resizing

  uint32_t new_size = bufferSize_;
  while (len > avail) {
    new_size = new_size > 0 ? new_size * 2 : 1;
    avail = available_write() + (new_size - bufferSize_);
  }

  // Allocate into a new pointer so we don't bork ours if it fails.
  uint8_t* new_buffer = static_cast<uint8_t*>(std::realloc(buffer_, new_size));
  if (new_buffer == NULL) {
    throw std::bad_alloc();
  }

  rBase_ = new_buffer + (rBase_ - buffer_);
  rBound_ = new_buffer + (rBound_ - buffer_);
  wBase_ = new_buffer + (wBase_ - buffer_);
  wBound_ = new_buffer + new_size;
  buffer_ = new_buffer;
  bufferSize_ = new_size;

avail = available_write() + (new_size - bufferSize_) 

  wBase_ = new_buffer + (wBase_ - buffer_);
  wBound_ = new_buffer + new_size;