mirror of
https://github.com/golang/go
synced 2024-11-18 08:04:40 -07:00
ac40c9872f
CL 345486 introduced an optimization to reflect's map accesses which is not quite correct. We can't use the optimized code if the value type is >128 bytes. See cmd/compile/internal/walk/walk.go:mapfast Fixes #48357 Change-Id: I8e3c7858693083dd4393a8de48ca5fa47bab66f2 Reviewed-on: https://go-review.googlesource.com/c/go/+/349593 Trust: Keith Randall <khr@golang.org> Trust: Joe Tsai <joetsai@digital-static.net> Trust: Josh Bleecher Snyder <josharian@gmail.com> Trust: Martin Möhrmann <martin@golang.org> Run-TryBot: Keith Randall <khr@golang.org> Run-TryBot: Joe Tsai <joetsai@digital-static.net> Reviewed-by: Joe Tsai <joetsai@digital-static.net> Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com> Reviewed-by: Martin Möhrmann <martin@golang.org> TryBot-Result: Go Bot <gobot@golang.org>
21 lines
360 B
Go
21 lines
360 B
Go
// run
|
|
|
|
// Copyright 2021 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 main
|
|
|
|
import "reflect"
|
|
|
|
type T [129]byte
|
|
|
|
func main() {
|
|
m := map[string]T{}
|
|
v := reflect.ValueOf(m)
|
|
v.SetMapIndex(reflect.ValueOf("a"), reflect.ValueOf(T{}))
|
|
g = m["a"]
|
|
}
|
|
|
|
var g T
|