mirror of
https://github.com/golang/go
synced 2024-11-14 13:20:30 -07:00
5a329c3bfb
CL 541715 added an optimization to copy SSA-able variables. When handling m[k] = append(m[k], ...) case, it uses ir.SameSafeExpr to check that m[k] expressions are the same, then doing type assertion to convert the map index to ir.IndexExpr node. However, this assertion is not safe for m[k] expression in append(m[k], ...), since it may be wrapped by ir.OCONVNOP node. Fixing this by un-wrapping any ir.OCONVNOP before doing type assertion. Fixes #66096 Change-Id: I9ff7165ab97bc7f88d0e9b7b31604da19a8ca206 Reviewed-on: https://go-review.googlesource.com/c/go/+/569716 Auto-Submit: Cuong Manh Le <cuong.manhle.vn@gmail.com> Reviewed-by: Matthew Dempsky <mdempsky@google.com> LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Michael Knyszek <mknyszek@google.com>
18 lines
352 B
Go
18 lines
352 B
Go
// compile
|
|
|
|
// Copyright 2024 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
|
|
|
|
type Message struct {
|
|
Header map[string][]string
|
|
}
|
|
|
|
func f() {
|
|
m := Message{Header: map[string][]string{}}
|
|
m.Header[""] = append([]string(m.Header[""]), "")
|
|
_ = m
|
|
}
|