message: Only set temp_dir if valid value
diff: @@ -182,8 +182,9 @@ void Realm::open_with_config(const Config& config,
  SharedGroupOptions options;
  options.durability = config.in_memory ? SharedGroupOptions::Durability::MemOnly :
  SharedGroupOptions::Durability::Full;
  -
  + if (!config.fifo_files_fallback_path.empty()) {
  options.temp_dir = util::normalize_dir(config.fifo_files_fallback_path);
  + }
  options.encryption_key = config.encryption_key.data();
  options.allow_file_format_upgrade = !config.disable_format_upgrade &&
  config.schema_mode != SchemaMode::ResetFile;
  