swift

91209d31 - [concurrency] Ban associated objects from being set on instances of actor classes that do not inherit from NSObject.

[concurrency] Ban associated objects from being set on instances of actor classes that do not inherit from NSObject. Associated objects are actively dangerous there because they’re non-isolated actor state, and it’s “new” code wher no backward compatibility concerns that make it more difficult to ban this on other forms of classes. rdar://69769048