// 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 import "io" type T1 interface { io.Reader } type T2 struct { io.SectionReader } type T3 struct { // ERROR "invalid recursive type: T3 refers to itself" T1 T2 parent T3 }