syscall: fix Write(nil) on NaCl
Fixes #7050.
LGTM=crawshaw, r
R=golang-codereviews, crawshaw, r
CC=golang-codereviews
https://golang.org/cl/91590043
diff --git a/src/pkg/syscall/fd_nacl.go b/src/pkg/syscall/fd_nacl.go
index 19cd98a..7432414 100644
--- a/src/pkg/syscall/fd_nacl.go
+++ b/src/pkg/syscall/fd_nacl.go
@@ -162,7 +162,13 @@
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
