Annotation required parameters are ignored

[Ehesp]

This bug appears on both:

• Dart SDK version: 2.16.2 (stable)
• Dart 2.18.0 (build 2.18.0-91.0.dev)

Given the following code snippet:

class MyAnnotation {
  final String foo;

  const MyAnnotation({
    required this.foo,
  });
}

@MyAnnotation()
class MyClass {}

void main() {
  MyAnnotation();
}

The analyzer does not complain that the required foo parameter is missing when used as an annotation. However, it does when the class is instantiated (within main). I am able to omit the required values from the annotation when they should be required.

[bwilkerson]

@scheglov

[scheglov]

https://dart-review.googlesource.com/c/sdk/+/243925

[Ehesp]

Dang thanks for the quick action!