| // 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 | |
| // test case 1 | |
| type T /* ERROR illegal cycle */ [U interface{ M() T[U] }] int | |
| type X int | |
| func (X) M() T[X] { return 0 } | |
| // test case 2 | |
| type A /* ERROR illegal cycle */ [T interface{ A[T] }] interface{} | |
| // test case 3 | |
| type A2 /* ERROR illegal cycle */ [U interface{ A2[U] }] interface{ M() A2[U] } | |
| type I interface{ A2[I]; M() A2[I] } |