// run
// 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.
package main
func main() {
x := []uint{0}
x[0] &^= f()
}
func f() uint {
return 1<<31 // doesn't panic with 1<<31 - 1
}