initializer_for_static_field

'{0}' is a static field in the enclosing class. Fields initialized in a constructor can't be static.

The analyzer produces this diagnostic when a static field is initialized in a constructor using either an initializing formal parameter or an assignment in the initializer list.

The following code produces this diagnostic because the static field a is being initialized by the initializing formal parameter this.a:

class C {
  static int? a;
  C(this.a);
}

If the field should be an instance field, then remove the keyword static:

class C {
  int? a;
  C(this.a);
}

If you intended to initialize an instance field and typed the wrong name, then correct the name of the field being initialized:

class C {
  static int? a;
  int? b;
  C(this.b);
}

If you really want to initialize the static field, then move the initialization into the constructor body:

class C {
  static int? a;
  C(int? c) {
    a = c;
  }
}

Unless stated otherwise, the documentation on this site reflects Dart 3.7.3. Page last updated on 2025-05-08. View source or report an issue.