Closed
Description
In pre-3.0 code the Function class can be implemented, extended and (probably) mixed in, it's just ignored and has absolutely no effect.
In 3.0 code, the Function class will have a final modifier which prevents all of the above.
The following tests seem to be affected by that (according to a grep):
Language/Expressions/Method_Invocation/Ordinary_Invocation/accessible_instance_member_t07.dart:class A extends Function {
Language/Expressions/Method_Invocation/Ordinary_Invocation/accessible_instance_member_t08.dart:class A extends Function {
If there are more examples (didn't find any implements?) or ones that go through indirections, say something like implements IdAlias<Function> with typedef IdAlias<T> = T;, then they might also need fixing.