// 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
import os "os"
type _ os.FileInfo
func f() (os int) {
// In the next line "os" should refer to the result variable, not
// to the package.
v := os.Open("", 0, 0); // ERROR "undefined"
return 0
}