Adding upstream version 1.21.8.upstream/1.21.8

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 51 insertions, 0 deletions

diff --git a/test/fixedbugs/issue45045.go b/test/fixedbugs/issue45045.go
new file mode 100644
index 0000000..6e6db64
--- /dev/null
+++ b/test/fixedbugs/issue45045.go
@@ -0,0 +1,51 @@
+// run
+
+// Copyright 2021 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"
+	"runtime"
+	"unsafe"
+)
+
+func k(c chan string, val string) string {
+	b := make([]byte, 1000)
+	runtime.SetFinalizer(&b[0], func(*byte) {
+		c <- val
+	})
+	var s string
+	h := (*reflect.StringHeader)(unsafe.Pointer(&s))
+	h.Data = uintptr(unsafe.Pointer(&b[0]))
+	h.Len = len(b)
+	return s
+}
+
+func main() {
+	{
+		c := make(chan string, 2)
+		m := make(map[string]int)
+		m[k(c, "first")] = 0
+		m[k(c, "second")] = 0
+		runtime.GC()
+		if s := <-c; s != "first" {
+			panic("map[string], second key did not retain.")
+		}
+		runtime.KeepAlive(m)
+	}
+
+	{
+		c := make(chan string, 2)
+		m := make(map[[2]string]int)
+		m[[2]string{k(c, "first")}] = 0
+		m[[2]string{k(c, "second")}] = 0
+		runtime.GC()
+		if s := <-c; s != "first" {
+			panic("map[[2]string], second key did not retain.")
+		}
+		runtime.KeepAlive(m)
+	}
+}