message: Fix logic bug: should use logical-AND, not bitwise-AND.
diff: @@ -67,7 +67,7 @@ Status SessionMgr::CreateSession(const string& session,
  worker_name = WorkerNameFromServerDef(server_def);
  }
  - if (worker_cache != nullptr & default_worker_cache_.get() != nullptr) {
  + if (worker_cache != nullptr && default_worker_cache_.get() != nullptr) {
  worker_cache->SetLogging(this->is_logging_active_);
  }
  