Index: util.c
===================================================================
--- util.c	(revision 22688)
+++ util.c	(working copy)
@@ -3362,7 +3362,7 @@
         if (i <= 0)
             i = 1;
     }
-    s = s0 = rv_alloc(i);
+    s = s0 = rv_alloc(i+1);
 
 #ifdef Honor_FLT_ROUNDS
     if (mode > 1 && rounding != 1)