BASH PATCH REPORT
			     =================

Bash-Release:	5.2
Patch-ID:	bash52-001

Bug-Reported-by:	Emanuele Torre <torreemanuele6@gmail.com>
Bug-Reference-ID:	<CAA7hNqeR1eSdiGK8mjQSqJPo815JYoG-Ekz-5PrAJTEYy2e6hg@mail.gmail.com>
Bug-Reference-URL:	https://lists.gnu.org/archive/html/bug-bash/2022-09/msg00060.html

Bug-Description:

Expanding unset arrays in an arithmetic context can cause a segmentation fault.

--- 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_ */
--- a/subst.c
+++ b/subst.c
@@ -10857,7 +10857,7 @@ expand_array_subscript (string, sindex,
   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);