From 4d3c8f6a389beab655f04f2bdd29a623d540a670 Mon Sep 17 00:00:00 2001
From: Baptiste Daroussin <bapt@FreeBSD.org>
Date: Mon, 18 Jan 2016 22:12:07 +0000
Subject: [PATCH] Import misc.c,v 1.46 from OpenBSD (by espie@)

Yet another missed ferror call
---
 usr.bin/m4/misc.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/usr.bin/m4/misc.c b/usr.bin/m4/misc.c
index eeca68e643c1..aeafea98f35d 100644
--- a/usr.bin/m4/misc.c
+++ b/usr.bin/m4/misc.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: misc.c,v 1.45 2014/12/21 09:33:12 espie Exp $	*/
+/*	$OpenBSD: misc.c,v 1.46 2015/12/07 14:12:46 espie Exp $	*/
 /*	$NetBSD: misc.c,v 1.6 1995/09/28 05:37:41 tls Exp $	*/
 
 /*
@@ -424,6 +424,8 @@ do_emit_synchline(void)
 void
 release_input(struct input_file *f)
 {
+	if (ferror(f->file))
+		errx(1, "Fatal error reading from %s\n", f->name);
 	if (f->file != stdin)
 	    fclose(f->file);
 	f->c = EOF;