1// errorcheck
2
3// Copyright 2017 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// Issue 20185: type switching on untyped values (e.g. nil or consts)
8// caused an internal compiler error.
9
10package p
11
12func F() {
13	switch t := nil.(type) { // ERROR "cannot type switch on non-interface value|not an interface"
14	default:
15		_ = t
16	}
17}
18
19const x = 1
20
21func G() {
22	switch t := x.(type) { // ERROR "cannot type switch on non-interface value|declared and not used|not an interface"
23	default:
24	}
25}
26