1// run
2
3// Copyright 2010 The Go Authors. All rights reserved.
4// Use of this source code is governed by a BSD-style
5// license that can be found in the LICENSE file.
6
7// https://golang.org/issue/749
8
9package main
10
11func f() (ok bool) { return false }
12
13func main() {
14	var i interface{}
15	i = f
16	_ = i.(func()bool)
17	_ = i.(func()(bool))
18}
19