From c377d504f68e44f719f8314b1492b86409b1289c Mon Sep 17 00:00:00 2001 From: "Yukihiro \"Matz\" Matsumoto" Date: Wed, 5 Jul 2017 02:48:00 +0900 Subject: Avoid undefined behavior of signed integer overflow; fix #3728 --- src/string.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'src/string.c') diff --git a/src/string.c b/src/string.c index e0b491bfb..bfa751332 100644 --- a/src/string.c +++ b/src/string.c @@ -1521,13 +1521,13 @@ mrb_str_hash(mrb_state *mrb, mrb_value str) struct RString *s = mrb_str_ptr(str); mrb_int len = RSTR_LEN(s); char *p = RSTR_PTR(s); - mrb_int key = 0; + uint64_t key = 0; while (len--) { key = key*65599 + *p; p++; } - return key + (key>>5); + return (mrb_int)(key + (key>>5)); } /* 15.2.10.5.20 */ -- cgit v1.2.3