1// compile
2
3// Copyright 2020 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// Ensure that late expansion correctly handles an OpIData with type interface{}
8
9package p
10
11type S struct{}
12
13func (S) M() {}
14
15type I interface {
16	M()
17}
18
19func f(i I) {
20	o := i.(interface{})
21	if _, ok := i.(*S); ok {
22		o = nil
23	}
24	println(o)
25}
26