// run
// Copyright 2010 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.
// https://golang.org/issue/662
package main
import "fmt"
func f() (int, int) { return 1, 2 }
func main() {
s := fmt.Sprint(f())
if s != "1 2" { // with bug, was "{1 2}"
println("BUG")
}
}