From 7274faabe97ce53d6b464272d7e6ab6c1392837b Mon Sep 17 00:00:00 2001
From: Chet Ramey <chet.ramey@case.edu>
Date: Wed, 5 Oct 2022 10:41:16 -0400
Subject: Readline-8.2 patch 1: fix crash when readline is started with an
 invalid locale specification

---
 nls.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/nls.c b/nls.c
index 5c6a13b..8c027d6 100644
--- a/nls.c
+++ b/nls.c
@@ -141,6 +141,10 @@ _rl_init_locale (void)
   if (lspec == 0)
     lspec = "";
   ret = setlocale (LC_CTYPE, lspec);	/* ok, since it does not change locale */
+  if (ret == 0 || *ret == 0)
+    ret = setlocale (LC_CTYPE, (char *)NULL);
+  if (ret == 0 || *ret == 0)
+    ret = RL_DEFAULT_LOCALE;
 #else
   ret = (lspec == 0 || *lspec == 0) ? RL_DEFAULT_LOCALE : lspec;
 #endif