message: Tweak random test to respect variable lifetime
diff: @@ -462,8 +462,10 @@ TYPED_TEST(ADIOS2_CXX11_API_MultiBlock, Put2File)
  writer.Put(var, &myData[b][0], TypeParam::PutMode);
  }
  - reader.Close();
  + // Close the writer before the reader because the var goes away when the
  + // reader does
  writer.Close();
  + reader.Close();
  this->CheckOutput(filename);
  }
  