--- a/vendor/golang.org/x/sys/unix/xattr_bsd.go	Wed Sep 18 19:17:42 2019 +0200
+++ b/vendor/golang.org/x/sys/unix/xattr_bsd.go	Sun Feb 16 18:54:01 2020 +0100
@@ -81,7 +81,10 @@
 // flags are unused on FreeBSD
 
 func Fsetxattr(fd int, attr string, data []byte, flags int) (err error) {
-	d := unsafe.Pointer(&data[0])
+	var d unsafe.Pointer
+	if len(data) > 0 {
+		d = unsafe.Pointer(&data[0])
+	}
 	datasiz := len(data)
 
 	nsid, a, err := xattrnamespace(attr)
@@ -94,7 +97,10 @@
 }
 
 func Setxattr(file string, attr string, data []byte, flags int) (err error) {
-	d := unsafe.Pointer(&data[0])
+	var d unsafe.Pointer
+	if len(data) > 0 {
+		d = unsafe.Pointer(&data[0])
+	}
 	datasiz := len(data)
 
 	nsid, a, err := xattrnamespace(attr)
@@ -107,7 +113,10 @@
 }
 
 func Lsetxattr(link string, attr string, data []byte, flags int) (err error) {
-	d := unsafe.Pointer(&data[0])
+	var d unsafe.Pointer
+	if len(data) > 0 {
+		d = unsafe.Pointer(&data[0])
+	}
 	datasiz := len(data)
 
 	nsid, a, err := xattrnamespace(attr)