1 // -lang=go1.13 2 3 // Copyright 2021 The Go Authors. All rights reserved. 4 // Use of this source code is governed by a BSD-style 5 // license that can be found in the LICENSE file. 6 7 // Check Go language version-specific errors. 8 9 package p 10 11 // interface embedding 12 13 type I interface { m() } 14 15 type _ interface { 16 m() 17 I // ERROR "duplicate method m" 18 } 19 20 type _ interface { 21 I 22 I // ERROR "duplicate method m" 23 } 24