set-related false positive rejection.

[modulovalue]

void main() {
  final set = 0;
  set;
}

The grammar appears to reject this program, but a single identifier named "set" is a valid expression.

[TimWhiting]

Yeah, set / get has always been tricky. I really don't have the time to look into this, but feel free to make a PR, I'm pretty good at getting to those.