--- a/src/luan/modules/lucene/LuceneIndex.java	Wed Sep 25 08:09:05 2019 -0600
+++ b/src/luan/modules/lucene/LuceneIndex.java	Mon Sep 30 16:58:28 2019 -0600
@@ -675,6 +675,8 @@
 				doc.add(newField( name, value, indexed, boost ));
 			} else { // list
 				LuanTable list = (LuanTable)value;
+				if( !list.isList() )
+					throw new LuanException("table value for '"+name+"' must be a list");
 				for( Object el : list.asList() ) {
 					doc.add(newField( name, el, indexed, boost ));
 				}