diff -r c040f992052f -r 1c52a0eeb952 vendor/golang.org/x/sys/unix/zsyscall_darwin_amd64.1_13.go
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/vendor/golang.org/x/sys/unix/zsyscall_darwin_amd64.1_13.go	Sun Feb 16 18:54:01 2020 +0100
@@ -0,0 +1,41 @@
+// go run mksyscall.go -tags darwin,amd64,go1.13 syscall_darwin.1_13.go
+// Code generated by the command above; see README.md. DO NOT EDIT.
+
+// +build darwin,amd64,go1.13
+
+package unix
+
+import (
+	"syscall"
+	"unsafe"
+)
+
+var _ syscall.Errno
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func closedir(dir uintptr) (err error) {
+	_, _, e1 := syscall_syscall(funcPC(libc_closedir_trampoline), uintptr(dir), 0, 0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+func libc_closedir_trampoline()
+
+//go:linkname libc_closedir libc_closedir
+//go:cgo_import_dynamic libc_closedir closedir "/usr/lib/libSystem.B.dylib"
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func readdir_r(dir uintptr, entry *Dirent, result **Dirent) (res Errno) {
+	r0, _, _ := syscall_syscall(funcPC(libc_readdir_r_trampoline), uintptr(dir), uintptr(unsafe.Pointer(entry)), uintptr(unsafe.Pointer(result)))
+	res = Errno(r0)
+	return
+}
+
+func libc_readdir_r_trampoline()
+
+//go:linkname libc_readdir_r libc_readdir_r
+//go:cgo_import_dynamic libc_readdir_r readdir_r "/usr/lib/libSystem.B.dylib"