// 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" } }