ff6ddd2972
If an operator declaration has both too many parameters, and one or more optional parameters, just report the former error. This is better UX, and is closer aligned to what the CFE reports. Change-Id: I1f30ab9564f4bcdc49c1f3317add6c55cca29597 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/185201 Reviewed-by: Konstantin Shcheglov <scheglov@google.com> Commit-Queue: Samuel Rawlins <srawlins@google.com>