1// errorcheck
2
3// Copyright 2012 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// Issue 3757: unhelpful typechecking loop message
8// for constants that refer to themselves.
9
10package main
11
12const a = a // ERROR "refers to itself|definition loop|initialization cycle"
13
14const (
15	X    = A
16	A    = B // ERROR "refers to itself|definition loop|initialization cycle"
17	B    = D
18	C, D = 1, A
19)
20
21func main() {
22}
23