`@mustBeOverridden operator -()` (unary minus) correctly overridden in the subclass erroneously reports `missing_override_of_must_be_overridden`

[TekExplorer]

import 'package:meta/meta.dart';
class Foo {
  @mustBeOverridden
  void operator -() {}
}

class Bar extends Foo { // Missing concrete implementation of '-'.
  @override
  void operator -() {}
}

Inexplicably, this seems to be specific to just unary minus, as far as i can tell.

Additionally, attempting to auto-fix an unimplemented unary minus, it literally fills as:

  @override
  ReturnType operator unary-() {
    // TODO: implement unary-
  }

Which is obviously incorrect, and implies that the issue lies somewhere in how the lint recognizes the name.

Dart SDK version: 3.10.0-75.1.beta (beta) (Thu Aug 7 07:58:56 2025 -0700) on "windows_x64"

[FMorschel]

The quick-fix was fixed at #61127 (3e7ba3e, which should be out on the new stable 3.10 if I understand the tagging process correctly)

I'll take a look at this one, thanks for opening the issue!

FYI @bwilkerson

[bwilkerson]

Also, the message is terrible. It was obviously copied from non_abstract_class_inherits_abstract_member without modifying it to fit the new rule.

I'd recommend replacing "Missing concrete implementations of" with "Missing a required override of".

[FMorschel]

The problem was using name and lookupName in different places. I'll upload a CL shortly to fix this. I'll make the message change in a different CL.

[FMorschel]

Here is the CL for the fix https://dart-review.googlesource.com/c/sdk/+/461842.

The CL for the message will be separate mostly because of how things around that are changing constantly right now.

[FMorschel]

Here is the second CL https://dart-review.googlesource.com/c/sdk/+/461861