golang issue50729 代码
文件路径：/src/go/types/testdata/fixedbugs/issue50729.go
/ Copyright 2022 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
/ version 1
var x1 T1[B1]
type T1[_ any] struct{}
type A1 T1[B1]
type B1 = T1[A1]
/ version 2
type T2[_ any] struct{}
type A2 T2[B2]
type B2 = T2[A2]
var x2 T2[B2]