golang issue48529 代码
文件路径：/src/cmd/compile/internal/types2/testdata/fixedbugs/issue48529.go
/ 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 /* ERROR illegal cycle */ [U interface{ M() T[U, int] }] int
type X int
func (X) M() T[X] { return 0 }