Fix UTF-8 boundary check; ref #4982

d029549c · Yukihiro "Matz" Matsumoto · Hiroshi Mimaki · 6e13467c · d029549c
Commit d029549c authored Apr 28, 2020 by Yukihiro "Matz" Matsumoto Committed by Hiroshi Mimaki May 01, 2020
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src/string.c src/string.c +1 -1

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--- 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);