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// $G $D/$F.go && $L $F.$A && ./$A.out || echo BUG: interface/noeq

// Copyright 2011 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.

// Interface values containing types that cannot be compared for equality.

package main

func main() {

        cmp(1)

        var (

                m map[int]int

                s struct{ x []int }

                f func()

        )

        noCmp(m)

        noCmp(s)

        noCmp(f)

}

func cmp(x interface{}) bool {

        return x == x

}

func noCmp(x interface{}) {

        shouldPanic(func() { cmp(x) })

}

func shouldPanic(f func()) {

        defer func() {

                if recover() == nil {

                        panic("function should panic")

                }

        }()

        f()

}