From 708cc7f694738c6dde2dbb5317749a5a9e6d26e2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E8=82=96=E5=9C=A8?= <xiaozai@kylinos.cn>
Date: Wed, 8 May 2024 17:04:43 +0800
Subject: [PATCH] fix for a crash if one of the expressions in an arithmetic
 for command expands to NULL

---
 execute_cmd.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/execute_cmd.c b/execute_cmd.c
index ce221a2..46b671d 100644
--- a/execute_cmd.c
+++ b/execute_cmd.c
@@ -3056,7 +3056,7 @@ eval_arith_for_expr (l, okp)
   temp = expand_arith_string (expr, Q_DOUBLE_QUOTES|Q_ARITH);
   if (l->next)
     free (expr);
-  new = make_word_list (make_word (temp), (WORD_LIST *)NULL);
+  new = make_word_list (make_word (temp ? temp : ""), (WORD_LIST *)NULL);
   free (temp);
 
   if (new)
-- 
2.33.0

