===================================================================
RCS file: /cvsrepo/anoncvs/cvs/src/usr.bin/mandoc/read.c,v
retrieving revision 1.190
retrieving revision 1.191
diff -u -r1.190 -r1.191
--- src/usr.bin/mandoc/read.c	2020/04/24 11:58:02	1.190
+++ src/usr.bin/mandoc/read.c	2021/06/27 17:57:13	1.191
@@ -1,4 +1,4 @@
-/* $OpenBSD: read.c,v 1.190 2020/04/24 11:58:02 schwarze Exp $ */
+/* $OpenBSD: read.c,v 1.191 2021/06/27 17:57:13 schwarze Exp $ */
 /*
  * Copyright (c) 2010-2020 Ingo Schwarze <schwarze@openbsd.org>
  * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
@@ -152,6 +152,7 @@
 	struct buf	*firstln, *lastln, *thisln, *loop;
 	char		*cp;
 	size_t		 pos; /* byte number in the ln buffer */
+	size_t		 spos; /* at the start of the current line parse */
 	int		 line_result, result;
 	int		 of;
 	int		 lnn; /* line number in the real file */
@@ -178,6 +179,7 @@
 			    curp->filenc & MPARSE_LATIN1)
 				curp->filenc = preconv_cue(&blk, i);
 		}
+		spos = pos;
 
 		while (i < blk.sz && (start || blk.buf[i] != '\0')) {
 
@@ -277,7 +279,8 @@
 
 		of = 0;
 rerun:
-		line_result = roff_parseln(curp->roff, curp->line, &ln, &of);
+		line_result = roff_parseln(curp->roff, curp->line,
+		    &ln, &of, start && spos == 0 ? pos : 0);
 
 		/* Process options. */