Avoid undefined behavior of signed integer overflow; fix
MODIFY
src/string.c
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 */

Avoid undefined behavior of signed integer overflow; fix #3728