From 43f9fbf1c67bd7237ef7670c2fd3019a4bbc84f0 Mon Sep 17 00:00:00 2001
From: Ingo Schwarze <schwarze@openbsd.org>
Date: Sun, 24 Apr 2022 13:38:46 +0000
Subject: If a .shift request has a negative argument, do not use a negative
 array index but use 0 instead of the argument, just like groff. Warn about
 the invalid argument. While here, fix the column number in another warning
 message.

Segfault reported by tb@, found with afl(1).
---
 regress/roff/shift/bad.in | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

(limited to 'regress/roff/shift/bad.in')

diff --git a/regress/roff/shift/bad.in b/regress/roff/shift/bad.in
index 809832de..22eff7e0 100644
--- a/regress/roff/shift/bad.in
+++ b/regress/roff/shift/bad.in
@@ -1,5 +1,5 @@
-.\" $OpenBSD: bad.in,v 1.1 2018/08/23 14:16:12 schwarze Exp $
-.TH SHIFT_BAD 1 "August 23, 2018"
+.\" $OpenBSD: bad.in,v 1.2 2022/04/24 13:34:53 schwarze Exp $
+.TH SHIFT_BAD 1 "April 24, 2022"
 .SH NAME
 .B shift-bad
 \(en wrong usage of macro arguments
@@ -22,6 +22,10 @@ argument used after call: "\$1"
 .de mym
 .shift badarg
 after shift badarg: "\\$1"
+.br
+.shift -1
+after shift \-1: "\\$1"
+.br
 .shift 2
 after excessive shift: \\n(.$ "\\$1"
 ..
-- 
cgit