DEATH_TEST(GtOp, InvalidEooOperand, "Invariant failure _rhs") {
    BSONObj operand;
    GTMatchExpression gt;
    gt.init("", operand.firstElement()).ignore();
}
DEATH_TEST(GtOp, InvalidEooOperand, "Invariant failure _rhs") {
    BSONObj operand;
    GTMatchExpression gt;
    gt.init("", operand.firstElement()).ignore();
}