| // 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 p | |
| type T[U interface{ M() T[U] }] int // ERROR "invalid recursive type: T refers to itself" | |
| type X int | |
| func (X) M() T[X] { return 0 } |