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syscall: fix Write(nil) on NaCl

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Fixes #7050.

LGTM=crawshaw, r
R=golang-codereviews, crawshaw, r
CC=golang-codereviews
https://golang.org/cl/91590043
This commit is contained in:
Russ Cox 2014-05-20 11:38:34 -04:00
parent a4a1fadfa2
commit 82854d7b39
2 changed files with 25 additions and 0 deletions
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6
src/pkg/syscall/fd_nacl.go
View File

@ -162,7 +162,13 @@ func Read(fd int, b []byte) (int, error) {
return f.impl.read(b)
}
var zerobuf [0]byte
func Write(fd int, b []byte) (int, error) {
if b == nil {
// avoid nil in syscalls; nacl doesn't like that.
b = zerobuf[:]
}
f, err := fdToFile(fd)
if err != nil {
return 0, err

19
test/fixedbugs/issue7050.go Normal file
View File

@ -0,0 +1,19 @@
// run
// Copyright 2014 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 (
"fmt"
"os"
)
func main() {
_, err := os.Stdout.Write(nil)
if err != nil {
fmt.Printf("BUG: os.Stdout.Write(nil) = %v\n", err)
}
}