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// $G $D/$F.go && $L $F.$A && ./$A.out || echo BUG should not crash

// 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

// Interface

type I interface { F() int }

// Implements interface

type S struct { }

func (s *S) F() int { return 1 }

// Allocates S but returns I

// Arg is unused but important:

// if you take it out (and the 0s below)

// then the bug goes away.

func NewI(i int) I {

        return new(S)

}

// Uses interface method.

func Use(x I) {

        x.F()

}

func main() {

        i := NewI(0);

        Use(i);

        // Again, without temporary

        // Crashes because x.F is 0.

        Use(NewI(0));

}