Index: matcher/msetpostlist.cc
===================================================================
--- matcher/msetpostlist.cc	(revision 13452)
+++ matcher/msetpostlist.cc	(working copy)
@@ -57,6 +57,7 @@
     // can return from now on is the weight of the current item.
     if (decreasing_relevance) {
 	// FIXME: This is actually a reduction in the maxweight...
+	if (at_end()) RETURN(0);
 	RETURN(mset_internal->items[cursor].wt);
     }