===================================================================
RCS file: /cvs/mandoc/read.c,v
retrieving revision 1.211
retrieving revision 1.212
diff -u -p -r1.211 -r1.212
--- mandoc/read.c	2019/01/11 17:04:44	1.211
+++ mandoc/read.c	2019/03/19 16:26:08	1.212
@@ -1,4 +1,4 @@
-/*	$Id: read.c,v 1.211 2019/01/11 17:04:44 schwarze Exp $ */
+/*	$Id: read.c,v 1.212 2019/03/19 16:26:08 schwarze Exp $ */
 /*
  * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
  * Copyright (c) 2010-2019 Ingo Schwarze <schwarze@openbsd.org>
@@ -255,6 +255,8 @@ mparse_buf_r(struct mparse *curp, struct buf blk, size
 		/* XXX Ugly hack to mark the end of the input. */
 
 		if (i == blk.sz || blk.buf[i] == '\0') {
+			if (pos + 2 > ln.sz)
+				resize_buf(&ln, 256);
 			ln.buf[pos++] = '\n';
 			ln.buf[pos] = '\0';
 		}