From ccd992355df7192993c666236047820244914598 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Tue, 16 Apr 2024 21:19:13 +0200 Subject: Adding upstream version 1.21.8. Signed-off-by: Daniel Baumann --- test/strcopy.go | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) create mode 100644 test/strcopy.go (limited to 'test/strcopy.go') diff --git a/test/strcopy.go b/test/strcopy.go new file mode 100644 index 0000000..6d32bae --- /dev/null +++ b/test/strcopy.go @@ -0,0 +1,29 @@ +// 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. + +// Test that string([]byte(string)) makes a copy and doesn't reduce to +// nothing. (Issue 25834) + +package main + +import ( + "reflect" + "unsafe" +) + +func main() { + var ( + buf = make([]byte, 2<<10) + large = string(buf) + sub = large[10:12] + subcopy = string([]byte(sub)) + subh = *(*reflect.StringHeader)(unsafe.Pointer(&sub)) + subcopyh = *(*reflect.StringHeader)(unsafe.Pointer(&subcopy)) + ) + if subh.Data == subcopyh.Data { + panic("sub and subcopy have the same underlying array") + } +} -- cgit v1.2.3