// errorcheck // Copyright 2016 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. package p func f(e interface{}) { switch e.(type) { case nil, nil: // ERROR "multiple nil cases in type switch|duplicate type in switch|duplicate case nil in type switch" } switch e.(type) { case nil: case nil: // ERROR "multiple nil cases in type switch|duplicate type in switch|duplicate case nil in type switch" } }