proper-super-calls

added in: 1.2.0

warning

🛠

Pro+

preset: recommended

Checks that super calls in the initState and dispose methods are called in the correct order.

Calling these super methods in the wrong order can lead to bugs when some properties are not yet initialized or have already been disposed.

Example

❌ Bad:

class _MyHomePageState<T> extends State<MyHomePage> {
  int _counter = 0;

  @override
  void initState() {
    someWork();

    // LINT: This 'super' call must come first.
    super.initState();
  }

  @override
  void dispose() {
    // LINT: This 'super' call must come last.
    super.dispose();

    someWork();
  }
}

✅ Good:

class _MyHomePageState<T> extends State<MyHomePage> {
  int _counter = 0;

  @override
  void initState() {
    super.initState();

    someWork();
  }

  @override
  void dispose() {
    someWork();

    super.dispose();
  }
}