!143 fix for a crash if one of the expressions in an arithmetic for command expands to NULL

From: @xiao-zai-kylinos 
Reviewed-by: @dillon_chen 
Signed-off-by: @dillon_chen

Fix-for-a-crash-if-one-of-the-expressions-in-an-arit.patch

@@ -0,0 +1,26 @@
+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
+

bash.spec

@@ -1,6 +1,6 @@
 Name:     bash
 Version:  5.2.15
-Release:  8
+Release:  9
 Summary:  It is the Bourne Again Shell
 License:  GPLv3
 URL:      https://www.gnu.org/software/bash
@@ -33,6 +33,7 @@ Patch6005: backport-fixes-for-LINENO-in-multi-line-simple-commands-print.patch
 Patch6006: backport-changes-to-SIGINT-handler-while-waiting-for-a-child-.patch
 Patch6007: backport-renamed-several-functions-beginning-with-legal_-chan.patch
 Patch6008: backport-fix-for-cd-when-curent-directory-doesn-t-exist-fix-w.patch
+Patch6009: Fix-for-a-crash-if-one-of-the-expressions-in-an-arit.patch
 
 BuildRequires: gcc bison texinfo autoconf ncurses-devel
 # Required for bash tests
@@ -161,6 +162,9 @@ make check
 %exclude %{_infodir}/dir
 
 %changelog
+* Wed May 08 2024 xiaozai <xiaozai@kylinos.cn> -5.2.15-9
+- fix for a crash if one of the expressions in an arithmetic for command expands to NULL 
+
 * Fri Apr 26 2024 wangyuhang <wangyuhang27@huawei.com> -5.2.15-8
 - sync patches from bash community