--- /usr/bin/abs	2012-09-07 18:51:04.000000000 +0200
+++ /tmp/abs	2014-04-25 11:59:13.607794680 +0200
@@ -241,6 +241,18 @@
 done
 
 if [ "$#" -gt "0" ]; then
+	# Check if params are actually repositories
+	for arg in "$@" ; do
+		# allow core/pkg and wildcards
+		[ "$arg" != "${arg/\/}" ] && continue
+		[ "$arg" != "${arg/\*}" ] && continue
+
+ 		for repo in "${REPOS[@]}" ; do
+			[ "$arg" = "$repo" ] && continue 2
+		done
+
+		error "$arg is not a valid repository"
+	done
 	CLPARAM=1
 	REPOS=("$@")
 fi