| // Copyright 2017 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. |
| // Escape analysis needs to treat the uintptr-typed reflect.*Header fields as pointers. |
| type immutableBytes []byte |
| // Bug was failure to leak param b. |
| func toString(b immutableBytes) string { // ERROR "leaking param: b$" |
| strHeader := (*reflect.StringHeader)(unsafe.Pointer(&s)) // ERROR "toString &s does not escape$" |
| strHeader.Data = (*reflect.SliceHeader)(unsafe.Pointer(&b)).Data // ERROR "toString &b does not escape$" |