Index: head/Mk/Scripts/clean-depends-list.sh
===================================================================
--- head/Mk/Scripts/clean-depends-list.sh	(revision 398928)
+++ head/Mk/Scripts/clean-depends-list.sh	(revision 398929)
@@ -1,50 +1,51 @@
 #!/bin/sh
 # MAINTAINER: portmgr@FreeBSD.org
 # $FreeBSD$
 
 . ${dp_SCRIPTSDIR}/functions.sh
 
 set -e
 validate_env dp_PKGNAME dp_MAKE dp_PORTSDIR
-set -u
 
 arg=$1
-shift
-if [ "${arg}" != "full" -a "${arg}" != "limited" ]; then
-	echo "the first argument can only be 'full' or 'limited'" >&2
+if [ -z "${arg}" ] || [ "${arg}" != "full" -a "${arg}" != "limited" ]; then
+	echo "The first argument can only be 'full' or 'limited'" >&2
 	exit 1
 fi
+shift
+
+set -u
 
 check_dep() {
 	for _dep ; do
 		myifs=${IFS}
 		IFS=:
 		set -- ${_dep}
 		IFS=${myifs}
 
 		case "${2}" in
 			/*) d=${2} ;;
 			*) d=${dp_PORTSDIR}/${2} ;;
 		esac
 
 		case " ${checked} " in
 			*\ ${d}\ *) continue ;; # Already checked
 		esac
 		checked="${checked} ${d}"
 		if [ ! -d ${d} ]; then
 			echo "${dp_PKGNAME}: \"${d}\" non-existent -- dependency list incomplete" >&2
 			continue
 		fi
 		set -- $(${dp_MAKE} -C ${d} -VWRKDIR -V_UNIFIED_DEPENDS)
 		if [ -d ${1} ]; then
 			echo ${d}
 		elif [ "$arg" = "limited" ]; then
 			continue
 		fi
 		shift
 		check_dep $@
 	done
 }
 
 checked=
 check_dep ${dp_ALLDEPENDS}