1 files changed, 5 insertions, 1 deletions

diff --git a/vendor/golang.org/x/sys/unix/syscall_unix.go b/vendor/golang.org/x/sys/unix/syscall_unix.go
index 0ed1d58..3de3756 100644
--- a/vendor/golang.org/x/sys/unix/syscall_unix.go
+++ b/vendor/golang.org/x/sys/unix/syscall_unix.go
@@ -351,7 +351,11 @@ func SetsockoptLinger(fd, level, opt int, l *Linger) (err error) {
 }
 
 func SetsockoptString(fd, level, opt int, s string) (err error) {
-        return setsockopt(fd, level, opt, unsafe.Pointer(&[]byte(s)[0]), uintptr(len(s)))
+        var p unsafe.Pointer
+        if len(s) > 0 {
+                p = unsafe.Pointer(&[]byte(s)[0])
+        }
+        return setsockopt(fd, level, opt, p, uintptr(len(s)))
 }
 
 func SetsockoptTimeval(fd, level, opt int, tv *Timeval) (err error) {