if (a == argsLeft.end())
        throw TypeError(format("job `%1%' requires an argument named `%2%'")
            % attrPath % cur->name);

    if (a == argsLeft.end()) {
        if (!cur->def)
            throw TypeError(format("job `%1%' requires an argument named `%2%'")
                % attrPath % cur->name);
        tryJobAlts(state, doc, argsUsed, argsLeft, attrPath, fun, next, last, actualArgs);
        return;
    }