rational.c: check integer overflow in `rational_minus`.
@@ -403,7 +403,9 @@ static mrb_value
rational_minus(mrb_state *mrb, mrb_value x)
{
struct mrb_rational *p = rational_ptr(mrb, x);
- return rational_new(mrb, -p->numerator, p->denominator);
+ mrb_int n = p->numerator;
+ if (n == MRB_INT_MIN) rat_overflow(mrb);
+ return rational_new(mrb, -n, p->denominator);
}
mrb_int mrb_num_div_int(mrb_state*, mrb_int, mrb_int);
