This adds error recovery for mixin and extension declarations with primary constructors. This avoids cascading errors when primary constructors are used with these declarations which do not support primary constructors.
Closes#63157
Change-Id: I17bfab4a7eabac1c75e7cfb580295dcf619c991d
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/499180
Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>
Reviewed-by: Konstantin Shcheglov <scheglov@google.com>
Commit-Queue: Johnni Winther <johnniwinther@google.com>
Johnni Winther
01a26f9022