DEATH_TEST(LtOp, InvalidEooOperand, "Invariant failure _rhs") {
    BSONObj operand;
    LTMatchExpression lt;
    lt.init("", operand.firstElement()).ignore();
}
DEATH_TEST(LtOp, InvalidEooOperand, "Invariant failure _rhs") {
    BSONObj operand;
    LTMatchExpression lt;
    lt.init("", operand.firstElement()).ignore();
}