|  | // run | 
|  |  | 
|  | // 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 main | 
|  |  | 
|  | var out int | 
|  | var zero int | 
|  |  | 
|  | func main() { | 
|  | wantPanic("test1", func() { | 
|  | out = 1 / zero | 
|  | }) | 
|  | wantPanic("test2", func() { | 
|  | _ = 1 / zero | 
|  | }) | 
|  | wantPanic("test3", func() { | 
|  | v := 0 | 
|  | _ = 1 / v | 
|  | }) | 
|  | wantPanic("test4", func() { divby(0) }) | 
|  | } | 
|  |  | 
|  | func wantPanic(test string, fn func()) { | 
|  | defer func() { | 
|  | if e := recover(); e == nil { | 
|  | panic(test + ": expected panic") | 
|  | } | 
|  | }() | 
|  | fn() | 
|  | } | 
|  |  | 
|  | //go:noinline | 
|  | func divby(v int) { | 
|  | _ = 1 / v | 
|  | } |