go source for verification 2026-05-22

test/typeparam/issue48711.go

@@ -0,0 +1,18 @@
+// errorcheck
+
+// 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
+
+func f[T interface{ ~[]P }, P any](t T) { // ERROR "instantiation cycle"
+	if t == nil {
+		return
+	}
+	f[[]T, T]([]T{t})
+}
+
+func main() {
+	f[[]int](nil)
+}