go source for verification 2026-05-22

test/typeparam/issue48453.go

@@ -0,0 +1,21 @@
+// 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
+
+//go:noinline
+func CopyMap[M interface{ ~map[K]V }, K comparable, V any](m M) M {
+	out := make(M, len(m))
+	for k, v := range m {
+		out[k] = v
+	}
+	return out
+}
+
+func main() {
+	var m map[*string]int
+	CopyMap(m)
+}