mirror of
https://github.com/golang/go
synced 2024-11-27 03:01:23 -07:00
b282efa022
Avoids false positive pointer arithmetic panic. Fixes #35027. Change-Id: Idd008caaab25fcf739327ac50a021b835ef13def Reviewed-on: https://go-review.googlesource.com/c/go/+/202560 Run-TryBot: Matthew Dempsky <mdempsky@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
24 lines
395 B
Go
24 lines
395 B
Go
// run -gcflags=-d=checkptr
|
|
|
|
// Copyright 2019 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
|
|
|
|
import (
|
|
"reflect"
|
|
"unsafe"
|
|
)
|
|
|
|
var s []int
|
|
|
|
func main() {
|
|
s = []int{42}
|
|
h := (*reflect.SliceHeader)(unsafe.Pointer(&s))
|
|
x := *(*int)(unsafe.Pointer(h.Data))
|
|
if x != 42 {
|
|
panic(x)
|
|
}
|
|
}
|