Index: contrib/scripts/live_ast
===================================================================
--- contrib/scripts/live_ast	(revision 254975)
+++ contrib/scripts/live_ast	(working copy)
@@ -168,7 +168,9 @@
 }
 
 command="$1"
-shift
+if [ $# -gt 0 ]; then
+  shift
+fi
 
 case "$command" in
 configure)