// 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()
}