you.experience_level++;

        // [ds] Make sure we increment you.experience_level and apply
        // any stat/hp increases only after we've cleared all prompts
        // for this experience level. If we do part of the work before
        // the prompt, and a player on telnet gets disconnected, the
        // SIGHUP will save Crawl in the in-between state and rob the
        // player of their level-up perks.
        const int new_exp = you.experience_level + 1;

        if (you.experience_level <= you.max_level)

        if (new_exp <= you.max_level)

                 "Welcome back to level %d!", you.experience_level );

                 "Welcome back to level %d!", new_exp );

            // No more prompts for this XL past this point.

            you.experience_level = new_exp;

            inc_hp( 4, true );
            inc_mp( 1, true );

            inc_hp(4, true);
            inc_mp(1, true);

            if (you.experience_level == 27)
               mprf(MSGCH_INTRINSIC_GAIN, "You have reached level 27, the final one!");

            if (new_exp == 27)
               mprf(MSGCH_INTRINSIC_GAIN,
                    "You have reached level 27, the final one!");

            {

                    you.experience_level);
            }

                    new_exp);

            if (!(new_exp % 3) && !skip_attribute_increase)
                _attribute_increase();
            // No more prompts for this XL past this point.

            if (you.experience_level > 21)

            if (new_exp > 21)

            else if (you.experience_level > 12)

            else if (new_exp > 12)

            you.experience_level = new_exp;

            if (!(you.experience_level % 3) && !skip_attribute_increase)
                _attribute_increase();

    // Catch up on any experience levels we did not assign last time. This
    // can happen if Crawl sees SIGHUP while it is waiting for the player
    // to dismiss a level-up prompt.
    _prep_input();
    level_change();