From c21727c0c4c6e49a5196a270a9a4bc961fcb679e Mon Sep 17 00:00:00 2001
From: schwarze <schwarze@openbsd.org>
Date: Mon, 15 Dec 2014 17:29:58 +0000
Subject: [PATCH] Catch localtime() failure for additional safety; patch from
 Jan Stary <hans at stare dot cz> some time ago.

---
 usr.bin/mandoc/mandoc.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/usr.bin/mandoc/mandoc.c b/usr.bin/mandoc/mandoc.c
index 45793f1752c..16c4f026ee5 100644
--- a/usr.bin/mandoc/mandoc.c
+++ b/usr.bin/mandoc/mandoc.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: mandoc.c,v 1.56 2014/11/28 19:25:03 schwarze Exp $ */
+/*	$OpenBSD: mandoc.c,v 1.57 2014/12/15 17:29:58 schwarze Exp $ */
 /*
  * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
  * Copyright (c) 2011, 2012, 2013, 2014 Ingo Schwarze <schwarze@openbsd.org>
@@ -475,6 +475,8 @@ time2a(time_t t)
 	int		 isz;
 
 	tm = localtime(&t);
+	if (tm == NULL)
+		return(NULL);
 
 	/*
 	 * Reserve space:
-- 
2.20.1