Adding upstream version 1.21.8.upstream/1.21.8

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

1 files changed, 38 insertions, 0 deletions

diff --git a/test/fixedbugs/issue14591.go b/test/fixedbugs/issue14591.go
new file mode 100644
index 0000000..626fbbc
--- /dev/null
+++ b/test/fixedbugs/issue14591.go
@@ -0,0 +1,38 @@
+// run
+
+// Copyright 2016 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 to make sure we don't think values are dead
+// when they are assigned to a PPARAMOUT slot before
+// the last GC safepoint.
+
+package main
+
+import (
+	"fmt"
+	"runtime"
+)
+
+// When a T is deallocated, T[1] is certain to
+// get clobbered (the runtime writes 0xdeaddeaddeaddead there).
+type T [4]int
+
+func f() (r, s *T) {
+	r = &T{0x30, 0x31, 0x32, 0x33}
+	runtime.GC()
+	s = &T{0x40, 0x41, 0x42, 0x43}
+	runtime.GC()
+	return
+}
+
+func main() {
+	r, s := f()
+	if r[1] != 0x31 {
+		fmt.Printf("bad r[1], want 0x31 got %x\n", r[1])
+	}
+	if s[1] != 0x41 {
+		fmt.Printf("bad s[1], want 0x41 got %x\n", s[1])
+	}
+}