static_access_to_instance_member

Instance member '{0}' can't be accessed using static access.

The analyzer produces this diagnostic when a class name is used to access an instance field. Instance fields don't exist on a class; they exist only on an instance of the class.

The following code produces this diagnostic because x is an instance field:

class C {
  static int a = 0;

  int b = 0;
}

int f() => C.b;

If you intend to access a static field, then change the name of the field to an existing static field:

class C {
  static int a = 0;

  int b = 0;
}

int f() => C.a;

If you intend to access the instance field, then use an instance of the class to access the field:

class C {
  static int a = 0;

  int b = 0;
}

int f(C c) => c.b;

Unless stated otherwise, the documentation on this site reflects Dart 3.8.1. Page last updated on 2025-05-08. View source or report an issue.