Program: 164027
Project: 164027
Buggy source:
@Override public boolean act(){
  if (target.isAlive()) {
    int maxDmg=3 + Math.round(4 * target.HP / (float)target.HT);
    int damage=Random.Int(1,maxDmg);
    Buff.detach(target,Chill.class);
    if (target instanceof Hero) {
      Hero hero=(Hero)target;
      if (hero.belongings.armor != null && hero.belongings.armor.hasGlyph(Brimstone.class)) {
        float heal=hero.belongings.armor.level() / 5f;
        if (Random.Float() < heal % 1)         heal++;
        if (heal >= 1 && hero.HP < hero.HT) {
          hero.sprite.emitter().burst(Speck.factory(Speck.HEALING),(int)heal);
          hero.HP=Math.min(hero.HT,hero.HP + (int)heal);
        }
      }
 else {
        hero.damage(damage,this);
        Item item=hero.belongings.randomUnequipped();
        if (item instanceof Scroll && !(item instanceof ScrollOfUpgrade || item instanceof ScrollOfMagicalInfusion)) {
          item=item.detach(hero.belongings.backpack);
          GLog.w(Messages.get(this,"String_Node_Str",Messages.capitalize(item.toString())));
          Heap.burnFX(hero.pos);
        }
 else         if (item instanceof MysteryMeat) {
          item=item.detach(hero.belongings.backpack);
          ChargrilledMeat steak=new ChargrilledMeat();
          if (!steak.collect(hero.belongings.backpack)) {
            Dungeon.level.drop(steak,hero.pos).sprite.drop();
          }
          GLog.w(Messages.get(this,"String_Node_Str",item.toString()));
          Heap.burnFX(hero.pos);
        }
      }
    }
 else {
      target.damage(damage,this);
    }
    if (target instanceof Thief) {
      Item item=((Thief)target).item;
      if (item instanceof Scroll && !(item instanceof ScrollOfUpgrade || item instanceof ScrollOfMagicalInfusion)) {
        target.sprite.emitter().burst(ElmoParticle.FACTORY,6);
        ((Thief)target).item=null;
      }
    }
  }
 else {
    detach();
  }
  if (Level.flamable[target.pos]) {
    GameScene.add(Blob.seed(target.pos,4,Fire.class));
  }
  spend(TICK);
  left-=TICK;
  if (left <= 0 || (Level.water[target.pos] && !target.flying)) {
    detach();
  }
  return true;
}

Fixed version (ground truth):
@Override public boolean act(){
  if (target.isAlive()) {
    int maxDmg=3 + Math.round(4 * target.HP / (float)target.HT);
    int damage=Random.Int(1,maxDmg);
    Buff.detach(target,Chill.class);
    if (target instanceof Hero) {
      Hero hero=(Hero)target;
      if (hero.belongings.armor != null && hero.belongings.armor.hasGlyph(Brimstone.class)) {
        float heal=hero.belongings.armor.level() / 5f;
        if (Random.Float() < heal % 1)         heal++;
        if (heal >= 1 && hero.HP < hero.HT) {
          hero.sprite.emitter().burst(Speck.factory(Speck.HEALING),(int)heal);
          hero.HP=Math.min(hero.HT,hero.HP + (int)heal);
        }
      }
 else {
        hero.damage(damage,this);
        Item item=hero.belongings.randomUnequipped();
        if (item instanceof Scroll && !(item instanceof ScrollOfUpgrade || item instanceof ScrollOfMagicalInfusion)) {
          item=item.detach(hero.belongings.backpack);
          GLog.w(Messages.get(this,"String_Node_Str",Messages.capitalize(item.toString())));
          Heap.burnFX(hero.pos);
        }
 else         if (item instanceof MysteryMeat) {
          item=item.detach(hero.belongings.backpack);
          ChargrilledMeat steak=new ChargrilledMeat();
          if (!steak.collect(hero.belongings.backpack)) {
            Dungeon.level.drop(steak,hero.pos).sprite.drop();
          }
          GLog.w(Messages.get(this,"String_Node_Str",item.toString()));
          Heap.burnFX(hero.pos);
        }
      }
    }
 else {
      target.damage(damage,this);
    }
    if (target instanceof Thief) {
      Item item=((Thief)target).item;
      if (item instanceof Scroll && !(item instanceof ScrollOfUpgrade || item instanceof ScrollOfMagicalInfusion)) {
        target.sprite.emitter().burst(ElmoParticle.FACTORY,6);
        ((Thief)target).item=null;
      }
    }
  }
 else {
    detach();
  }
  if (Level.flamable[target.pos] && Blob.volumeAt(target.pos,Fire.class) == 0) {
    GameScene.add(Blob.seed(target.pos,4,Fire.class));
  }
  spend(TICK);
  left-=TICK;
  if (left <= 0 || (Level.water[target.pos] && !target.flying)) {
    detach();
  }
  return true;
}