===================================================================
RCS file: /cvs/mandoc/mdoc_term.c,v
retrieving revision 1.62
retrieving revision 1.63
diff -u -p -r1.62 -r1.63
--- mandoc/mdoc_term.c	2009/07/24 12:52:28	1.62
+++ mandoc/mdoc_term.c	2009/07/25 16:03:03	1.63
@@ -1,4 +1,4 @@
-/*	$Id: mdoc_term.c,v 1.62 2009/07/24 12:52:28 kristaps Exp $ */
+/*	$Id: mdoc_term.c,v 1.63 2009/07/25 16:03:03 kristaps Exp $ */
 /*
  * Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@kth.se>
  *
@@ -674,6 +674,7 @@ fmt_block_vspace(struct termp *p, 
 
 	if (MDOC_Bl == bl->tok && arg_hasattr(MDOC_Compact, bl))
 		return;
+	assert(node);
 
 	/*
 	 * Search through our prior nodes.  If we follow a `Ss' or `Sh',