Use `mrb_raise()` instead of `mrb_raisef()`; ref
@@ -709,7 +709,7 @@ mrb_str_resize(mrb_state *mrb, mrb_value str, mrb_int len)
struct RString *s = mrb_str_ptr(str);
if (len < 0) {
- mrb_raisef(mrb, E_ARGUMENT_ERROR, "negative (or overflowed) string size");
+ mrb_raise(mrb, E_ARGUMENT_ERROR, "negative (or overflowed) string size");
}
mrb_str_modify(mrb, s);
slen = RSTR_LEN(s);
