| // run | |
| // Copyright 2018 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 main | |
| func main() { | |
| m := map[interface{}]int{} | |
| k := []int{} | |
| mustPanic(func() { | |
| _ = m[k] | |
| }) | |
| mustPanic(func() { | |
| _, _ = m[k] | |
| }) | |
| mustPanic(func() { | |
| delete(m, k) | |
| }) | |
| } | |
| func mustPanic(f func()) { | |
| defer func() { | |
| r := recover() | |
| if r == nil { | |
| panic("didn't panic") | |
| } | |
| }() | |
| f() | |
| } |