golang issue35518 代码
文件路径：/test/fixedbugs/issue35518.go
/ errorcheck -0 -l -m=2
/ Copyright 2019 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.
/ This test makes sure that -m=2's escape analysis diagnostics don't
/ go into an infinite loop when handling negative dereference
/ cycles. The critical thing being tested here is that compilation
/ succeeds ("errorcheck -0"), not any particular diagnostic output,
/ hence the very lax ERROR patterns below.
package p
type Node struct {
Orig *Node
}
var sink *Node
func f1() {
var n Node / ERROR "."
n.Orig = &n
m := n / ERROR "."
sink = &m
}
func f2() {
var n1, n2 Node / ERROR "."
n1.Orig = &n2
n2 = n1
m := n2 / ERROR "."
sink = &m
}
func f3() {
var n1, n2 Node / ERROR "."
n1.Orig = &n1
n1.Orig = &n2
sink = n1.Orig.Orig
}