pkg/front_end/testcases/patterns/issue51410.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.

X id<X>(X x) => x;

void main() {
  var (int Function(int) f) = id;
}