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https://github.com/golang/go
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e6066711a0
Previously, cmd/compile rejected constant int->string conversions if the integer value did not fit into an "int" value. Also, runtime incorrectly truncated 64-bit values to 32-bit before checking if they're a valid Unicode code point. According to the Go spec, both of these cases should instead yield "\uFFFD". Fixes #15039. Change-Id: I3c8a3ad9a0780c0a8dc1911386a523800fec9764 Reviewed-on: https://go-review.googlesource.com/21344 Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
26 lines
545 B
Go
26 lines
545 B
Go
// run
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// Copyright 2016 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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func main() {
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const fffd = "\uFFFD"
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// runtime.intstring used to convert int64 to rune without checking
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// for truncation.
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u := uint64(0x10001f4a9)
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big := string(u)
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if big != fffd {
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panic("big != bad")
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}
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// cmd/compile used to require integer constants to fit into an "int".
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const huge = string(1<<100)
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if huge != fffd {
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panic("huge != bad")
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}
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}
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