// run
// 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.
// Test static interface conversion of interface value nil.
package main
type R interface { R() }
type RW interface { R(); W() }
var e interface {}
var r R
var rw RW
func main() {
r = r
r = rw
e = r
e = rw
rw = rw
}