1// errorcheck
2
3// Copyright 2016 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
7package p
8
9func f(e interface{}) {
10	switch e.(type) {
11	case nil, nil: // ERROR "multiple nil cases in type switch|duplicate type in switch|duplicate case nil in type switch"
12	}
13
14	switch e.(type) {
15	case nil:
16	case nil: // ERROR "multiple nil cases in type switch|duplicate type in switch|duplicate case nil in type switch"
17	}
18}
19