compilation error

[fiurthorn]

Steps to reproduce

https://github.com/fiurthorn/bug

flutter run -d chrome                                 
Launching lib/main.dart on Chrome in debug mode...
lib/second.dart:3:14: Error: Type 'Entity' can't use itself as a bound.
Try breaking the cycle by removing at least on of the 'extends' clauses in the cycle.
class Second<Entity extends entity.Entity> {
             ^^^^^^

import 'package:bug/entity.dart' as entity;

class Second<Entity extends entity.Entity> {
  Entity entity;

  Second(this.entity);
}

Expected results

until 3.13 the import rename work fine, the dart compiler itself, (and the language server) reports no error, but
the dart2js compiler wont resolve the symbols since 3.16.

Actual results

flutter run -d chrome                                 
Launching lib/main.dart on Chrome in debug mode...
lib/second.dart:3:14: Error: Type 'Entity' can't use itself as a bound.
Try breaking the cycle by removing at least on of the 'extends' clauses in the cycle.
class Second<Entity extends entity.Entity> {
             ^^^^^^

[fishythefish]

AFAIK, that error comes from the CFE.

[sigmundch]

I've confirmed this is a CFE regression. Simple repro that fails also on the VM and fasta:

a.dart:

class A {}

b.dart:

import 'a.dart' as a;
class B<A extends a.A> {}
main() => B();

[chloestefantsova]

This issue seems to share the underlying cause with #54097. I'm working on a fix at https://dart-review.googlesource.com/c/sdk/+/337183.