await_in_late_local_variable_initializer

The 'await' expression can't be used in a 'late' local variable's initializer.

The analyzer produces this diagnostic when a local variable that has the late modifier uses an await expression in the initializer.

The following code produces this diagnostic because an await expression is used in the initializer for v, a local variable that is marked late:

Future<int> f() async {
  late var v = await 42;
  return v;
}

If the initializer can be rewritten to not use await, then rewrite it:

Future<int> f() async {
  late var v = 42;
  return v;
}

If the initializer can't be rewritten, then remove the late modifier:

Future<int> f() async {
  var v = await 42;
  return v;
}

Unless stated otherwise, the documentation on this site reflects Dart 3.8.0. Page last updated on 2025-05-08. View source or report an issue.