message: Declare all variables
diff: @@ -296,7 +296,7 @@ Connection.prototype.register_bulk;
  */
  Connection.prototype.unregister;
  -default_connection = function (o) {
  +var default_connection = function (o) {
  if (o.default_connection == undefined) {
  o.default_connection = new duckdb.Connection(o);
  }
  