message: Check offsets in hasWritableData()
  Summary: Check offsets in hasWritableData()
diff: @@ -366,6 +366,7 @@ struct QuicStreamState : public QuicStreamLike {
  // needs to have writeBuffer, or it has EOF to send.
  bool hasWritableData() const {
  if (!writeBuffer.empty()) {
  + CHECK_GE(flowControlState.peerAdvertisedMaxOffset, currentWriteOffset);
  return flowControlState.peerAdvertisedMaxOffset - currentWriteOffset > 0;
  }
  if (finalWriteOffset) {
  