// errorcheck
// Copyright 2012 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.
// Issue 4283: nil == nil can't be done as the type is unknown.
package p
func F1() bool {
return nil == nil // ERROR "invalid"
}
func F2() bool {
return nil != nil // ERROR "invalid"
}