pkg/front_end/testcases/extension_types/issue51146.dart

// Copyright (c) 2023, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

extension type I<X, Y>(X value) {}

void f(I<int, String> i) {}

void main() {
  f(I(2));
}