From: Chet Ramey <chet.ramey@case.edu>
Date: Wed, 5 Oct 2022 14:36:55 +0000 (-0400)
Subject: Bash-5.2 patch 1: fix crash with unset arrays in arithmetic contexts
X-Git-Tag: bash-5.3-alpha~28
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=a1e58b8c064cbf3cb0180b63e581770de7ccea5b;p=thirdparty%2Fbash.git

Bash-5.2 patch 1: fix crash with unset arrays in arithmetic contexts
---

diff --git a/patchlevel.h b/patchlevel.h
index 165390c15..c0dbb500d 100644
--- a/patchlevel.h
+++ b/patchlevel.h
@@ -25,6 +25,6 @@
    regexp `^#define[ 	]*PATCHLEVEL', since that's what support/mkversion.sh
    looks for to find the patch level (for the sccs version string). */
 
-#define PATCHLEVEL 0
+#define PATCHLEVEL 1
 
 #endif /* _PATCHLEVEL_H_ */
diff --git a/subst.c b/subst.c
index d9feabca9..93b91606c 100644
--- a/subst.c
+++ b/subst.c
@@ -10857,7 +10857,7 @@ expand_array_subscript (string, sindex, quoted, flags)
   exp = substring (string, si+1, ni);
   t = expand_subscript_string (exp, quoted & ~(Q_ARITH|Q_DOUBLE_QUOTES));
   free (exp);
-  exp = sh_backslash_quote (t, abstab, 0);
+  exp = t ? sh_backslash_quote (t, abstab, 0) : savestring ("");
   free (t);
 
   slen = STRLEN (exp);