Should not use `mrb_float_value()` with `MRB_WITHOUT_FLOAT`.
MODIFY
src/numeric.c
src/numeric.c
@@ -158,7 +158,7 @@ integral_div(mrb_state *mrb, mrb_value xv)
if (y == 0) {
mrb_raise(mrb, E_RUNTIME_ERROR, "devided by zero");
}
- return mrb_float_value(mrb, mrb_fixnum(xv) / y);
+ return mrb_fixnum_value(mrb, mrb_fixnum(xv) / y);
#else
mrb_float x, y;

Should not use `mrb_float_value()` with `MRB_WITHOUT_FLOAT`.