// $G $D/$F.go && $L $F.$A && ./$A.out

// 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

type S struct {
	a []int;
}
var s = &S{make([]int, 10)}

func main() {
	s.a[f()] = 1	// 6g used to call f twice here
}

var n int
func f() int{
	if n++; n > 1 {
		panicln("f twice");
	}
	return 0
}