message: Release mutex_lock before destroying mutex.
diff: @@ -331,8 +331,10 @@ TEST_F(RpcRendezvousMgrTest, RemoteRecvAsyncMany) {
  [&mu_, &status, &counter](const Status& s, const Rendezvous::Args&,
  const Rendezvous::Args&, const Tensor&,
  const bool) {
  + {
  mutex_lock l(mu_);
  status.Update(s);
  + }
  counter.DecrementCount();
  });
  }
  