From fa213a2d89328edf20b0ba2241cf29fb3af3be6a Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby.or.jp>
Date: Mon, 29 Apr 2024 16:35:08 +0900
Subject: [PATCH] string.c (search_nonascii): prevent buffer overrun; ref #6255

---
 src/string.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/string.c b/src/string.c
index 40f7081b0..cd1a01cbc 100644
--- a/src/string.c
+++ b/src/string.c
@@ -332,6 +332,7 @@ search_nonascii(const char *p, const char *e)
   case 2:  if (NOASCII(*p)) return p; ++p;
   case 1:  if (NOASCII(*p)) return p; ++p;
            if (NOASCII(*p)) return p;
+  case 0:  break;
   }
   return e;
 }