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-rw-r--r--test/fixedbugs/issue24187.go33
1 files changed, 33 insertions, 0 deletions
diff --git a/test/fixedbugs/issue24187.go b/test/fixedbugs/issue24187.go
new file mode 100644
index 0000000..45fc929
--- /dev/null
+++ b/test/fixedbugs/issue24187.go
@@ -0,0 +1,33 @@
+// +build amd64p32
+// 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.
+
+package main
+
+import (
+ "bytes"
+ "fmt"
+ "unsafe"
+)
+
+func main() {
+ b := make([]byte, 128)
+ for i := range b {
+ b[i] = 1
+ }
+ if bytes.IndexByte(b, 0) != -1 {
+ panic("found 0")
+ }
+ for i := range b {
+ b[i] = 0
+ c := b
+ *(*int)(unsafe.Pointer(uintptr(unsafe.Pointer(&c)) + unsafe.Sizeof(uintptr(0)))) = 1<<31 - 1
+ if bytes.IndexByte(c, 0) != i {
+ panic(fmt.Sprintf("missing 0 at %d\n", i))
+ }
+ b[i] = 1
+ }
+}