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avoid-bottom-type-in-records

added in: 1.5.0
warning
Dart 3.0+

Warns when a record type declaration contains fields with void, Never or Null.

Presence of these types inside a record is most likely a bug.

Example​

❌ Bad:

typedef NullableRecord = ({String str, void hello}); // LINT

(Null, int) nullable() => (null, 1); // LINT

(void hell, Never never) function() => (null, null); // LINT

✅ Good:

typedef NullableRecord = ({String str, Future<void> hello});

(int?, int) nullable() => (null, 1);

(String, int) correct() => ('str', 1);