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-rw-r--r--src/string.c2
1 files changed, 1 insertions, 1 deletions
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);