From 2c32154115fc4fe753eff0075d6a204d899f1cb6 Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby.or.jp>
Date: Tue, 28 Apr 2020 11:59:20 +0900
Subject: Fix UTF-8 boundary check; ref #4982

---
 src/string.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'src')

diff --git a/src/string.c b/src/string.c
index 9ea19d107..2ef1ad95a 100644
--- a/src/string.c
+++ b/src/string.c
@@ -463,7 +463,7 @@ str_index_str_by_char_search(mrb_state *mrb, const char *p, const char *pend, co
     }
 
     pivot = p + qstable[(unsigned char)p[slen - 1]];
-    if (pivot > pend || pivot < p /* overflowed */) { return -1; }
+    if (pivot >= pend || pivot < p /* overflowed */) { return -1; }
 
     do {
       p += utf8len(p, pend);
-- 
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