===================================================================
RCS file: /cvs/mandoc/mdoc_validate.c,v
retrieving revision 1.331
retrieving revision 1.332
diff -u -p -r1.331 -r1.332
--- mandoc/mdoc_validate.c	2017/06/07 23:29:48	1.331
+++ mandoc/mdoc_validate.c	2017/06/08 00:23:30	1.332
@@ -1,4 +1,4 @@
-/*	$Id: mdoc_validate.c,v 1.331 2017/06/07 23:29:48 schwarze Exp $ */
+/*	$Id: mdoc_validate.c,v 1.332 2017/06/08 00:23:30 schwarze Exp $ */
 /*
  * Copyright (c) 2008-2012 Kristaps Dzonsons <kristaps@bsd.lv>
  * Copyright (c) 2010-2017 Ingo Schwarze <schwarze@openbsd.org>
@@ -793,6 +793,9 @@ post_lb(POST_ARGS)
 		mdoc->last = n;
 		return;
 	}
+
+	mandoc_vmsg(MANDOCERR_LB_BAD, mdoc->parse, n->child->line,
+	    n->child->pos, "Lb %s", n->child->string);
 
 	roff_word_alloc(mdoc, n->line, n->pos, "library");
 	mdoc->last->flags = NODE_NOSRC;