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go/test/escape_selfassign.go
Matthew Dempsky ff3ae455d9 test: add regress test cases for self-assignment
Cherry pointed out this case in review for CL 136496. That CL was
slightly too aggressive, and I likely would have made the same mistake
if I tried it myself.

Updates #27772.

Change-Id: I1fafabb9f8d9aba0494aa71333a4e17cf1bac5c8
Reviewed-on: https://go-review.googlesource.com/c/go/+/172421
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2019-04-17 16:36:56 +00:00

33 lines
538 B
Go

// errorcheck -0 -m -l
// 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.
// Test escape analysis for self assignments.
package escape
type S struct {
i int
pi *int
}
var sink S
func f(p *S) { // ERROR "leaking param: p"
p.pi = &p.i
sink = *p
}
// BAD: "leaking param: p" is too conservative
func g(p *S) { // ERROR "leaking param: p"
p.pi = &p.i
}
func h() {
var s S // ERROR "moved to heap: s"
g(&s)
sink = s
}