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https://github.com/golang/go
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c4db811e44
User code is unlikely to be correct, but don't crash the compiler when the offset of a pointer in an object is not a multiple of the pointer size. Fixes #61187 Change-Id: Ie56bfcb38556c5dd6f702ae4ec1d4534c6acd420 Reviewed-on: https://go-review.googlesource.com/c/go/+/508555 Reviewed-by: Cherry Mui <cherryyz@google.com> Run-TryBot: Keith Randall <khr@golang.org> TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Keith Randall <khr@google.com>
23 lines
458 B
Go
23 lines
458 B
Go
// compile
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// Copyright 2023 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package main
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import (
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"fmt"
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"reflect"
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"unsafe"
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)
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var slice = []byte{'H', 'e', 'l', 'l', 'o', ','}
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func main() {
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ptr := uintptr(unsafe.Pointer(&slice)) + 100
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header := (*reflect.SliceHeader)(unsafe.Pointer(ptr))
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header.Data += 1
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fmt.Printf("%d %d\n", cap(slice), header.Cap)
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}
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