go source for verification 2026-05-22

test/fixedbugs/issue47771.go

@@ -0,0 +1,19 @@
+// 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.
+
+// gofrontend miscompiled some cases of append(s, make(typ, ln)...).
+
+package main
+
+var g int
+
+func main() {
+	a := []*int{&g, &g, &g, &g}
+	a = append(a[:0], make([]*int, len(a) - 1)...)
+	if len(a) != 3 || a[0] != nil || a[1] != nil || a[2] != nil {
+		panic(a)
+	}
+}