mirror of
https://github.com/golang/go
synced 2024-11-15 01:20:28 -07:00
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
|
|
|
|
// Copyright 2016 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
|
|
|
|
func main() {
|
|
const fffd = "\uFFFD"
|
|
|
|
// runtime.intstring used to convert int64 to rune without checking
|
|
// for truncation.
|
|
u := uint64(0x10001f4a9)
|
|
big := string(u)
|
|
if big != fffd {
|
|
panic("big != bad")
|
|
}
|
|
|
|
// cmd/compile used to require integer constants to fit into an "int".
|
|
const huge = string(1<<100)
|
|
if huge != fffd {
|
|
panic("huge != bad")
|
|
}
|
|
}
|