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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
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// Copyright 2021 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package main
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import "reflect"
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type T [129]byte
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func main() {
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m := map[string]T{}
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v := reflect.ValueOf(m)
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v.SetMapIndex(reflect.ValueOf("a"), reflect.ValueOf(T{}))
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g = m["a"]
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}
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var g T
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