b022ecae70
If a mixin refers to a non-existing class (or Function) it doesn't get the otherwise expected number of implementedTypes and crashes. Fixes https://github.com/dart-lang/sdk/issues/59870 Change-Id: I482e997751b36c5d62d2151b31bd58875d86ebf3 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/403602 Reviewed-by: Johnni Winther <johnniwinther@google.com> Commit-Queue: Jens Johansen <jensj@google.com>