// errorcheck
// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package main
func main() {
// 6g used to compile these as two different
// hash codes so it missed the duplication
// and worse, compiled the wrong code
// for one of them.
var x interface{};
switch x.(type) {
case func(int):
case func(f int): // ERROR "duplicate"
}
}