GetResultSet causes Segfault

The following code leads to a segfault. If Execute is used instead, everything is fine.

  auto retr_transaction(connection->CreateTransaction());
  retr_transaction->Query("FIND Experiment");
  //retr_transaction->Execute();
  retr_transaction->ExecuteAsynchronously();
  EXPECT_EQ(retr_transaction->GetResultSet().size(), 1);