Program: 154501
Project: 154501
Buggy source:
public void destroy(){
  if (material == EnumBowMaterial.ICE) {
    int radius=3;
    int radiusSq=(int)Math.pow(radius,2.0D);
    World world=getBukkitEntity().getWorld();
    for (int x=getBukkitEntity().getLocation().getBlockX() - radius; x <= getBukkitEntity().getLocation().getBlockX() + radius; x++) {
      for (int z=getBukkitEntity().getLocation().getBlockZ() - radius; z <= getBukkitEntity().getLocation().getBlockZ() + radius; z++) {
        if (new Vector(x,getBukkitEntity().getLocation().getBlockY(),z).distanceSquared(new Vector(getBukkitEntity().getLocation().getX(),getBukkitEntity().getLocation().getY(),getBukkitEntity().getLocation().getZ())) > radiusSq) {
          continue;
        }
        if ((new Random()).nextInt(4) > 0) {
          continue;
        }
        for (int y=getBukkitEntity().getLocation().getBlockY() + radius; y >= getBukkitEntity().getLocation().getBlockY() - radius; y--) {
          int id=world.getBlockTypeIdAt(x,y,z);
          if ((id == 6) || (id == 10) || (id == 11)|| (id == 37)|| (id == 38)|| (id == 39)|| (id == 40)|| (id == 44)|| (id == 50)|| (id == 51)|| (id == 53)|| (id == 55)|| (id == 59)|| ((id >= 63) && (id <= 72))|| (id == 75)|| (id == 76)|| (id == 77)|| (id == 78)|| (id == 79)|| (id == 81)|| (id == 83)|| (id == 85)|| (id == 90)) {
            break;
          }
          if ((id == 8) || (id == 9)) {
            world.getBlockAt(x,y,z).setTypeId(79);
            break;
          }
          if (id != 0) {
            if (y == 127) {
              break;
            }
            world.getBlockAt(x,y + 1,z).setTypeId(78);
            break;
          }
        }
      }
    }
  }
 else   if (material == EnumBowMaterial.FIRE) {
    World world=getBukkitEntity().getWorld();
    world.getBlockAt((int)locX,(int)locY,(int)locZ).setType(Material.FIRE);
  }
 else   if (material == EnumBowMaterial.TNT) {
    EntityTNTPrimed tnt=new EntityTNTPrimed(this.world,locX,locY,locZ);
    tnt.a=0;
    world.addEntity(tnt);
    tnt.f_();
  }
 else   if (material == EnumBowMaterial.THUNDER) {
    World world=getBukkitEntity().getWorld();
    world.strikeLightning(new Location(world,locX,locY,locZ));
  }
 else   if (material == EnumBowMaterial.MONSTER) {
    World world=getBukkitEntity().getWorld();
    CreatureType[] types={CreatureType.CREEPER,CreatureType.SKELETON,CreatureType.SLIME,CreatureType.SPIDER,CreatureType.ZOMBIE};
    world.spawnCreature(getBukkitEntity().getLocation(),types[(new Random()).nextInt(5)]);
  }
 else   if (material == EnumBowMaterial.TREE) {
    World world=getBukkitEntity().getWorld();
    Location loc=getBukkitEntity().getLocation();
    world.generateTree(loc,TreeType.TREE);
  }
 else   if (material == EnumBowMaterial.ZEUS) {
    Location loc=getBukkitEntity().getLocation();
    World worldf=loc.getWorld();
    worldf.strikeLightning(loc);
    loc.getBlock().setType(Material.FIRE);
    EntityTNTPrimed tnt=new EntityTNTPrimed(this.world,locX,locY,locZ);
    tnt.a=0;
    world.addEntity(tnt);
    tnt.f_();
  }
}

Fixed version (ground truth):
public void destroy(){
  if (material == EnumBowMaterial.ICE) {
    int radius=3;
    int radiusSq=(int)Math.pow(radius,2.0D);
    World world=getBukkitEntity().getWorld();
    for (int x=getBukkitEntity().getLocation().getBlockX() - radius; x <= getBukkitEntity().getLocation().getBlockX() + radius; x++) {
      for (int z=getBukkitEntity().getLocation().getBlockZ() - radius; z <= getBukkitEntity().getLocation().getBlockZ() + radius; z++) {
        if (new Vector(x,getBukkitEntity().getLocation().getBlockY(),z).distanceSquared(new Vector(getBukkitEntity().getLocation().getX(),getBukkitEntity().getLocation().getY(),getBukkitEntity().getLocation().getZ())) > radiusSq) {
          continue;
        }
        if ((new Random()).nextInt(4) > 0) {
          continue;
        }
        for (int y=getBukkitEntity().getLocation().getBlockY() + radius; y >= getBukkitEntity().getLocation().getBlockY() - radius; y--) {
          int id=world.getBlockTypeIdAt(x,y,z);
          if ((id == 6) || (id == 10) || (id == 11)|| (id == 37)|| (id == 38)|| (id == 39)|| (id == 40)|| (id == 44)|| (id == 50)|| (id == 51)|| (id == 53)|| (id == 55)|| (id == 59)|| ((id >= 63) && (id <= 72))|| (id == 75)|| (id == 76)|| (id == 77)|| (id == 78)|| (id == 79)|| (id == 81)|| (id == 83)|| (id == 85)|| (id == 90)) {
            break;
          }
          if ((id == 8) || (id == 9)) {
            world.getBlockAt(x,y,z).setTypeId(79);
            break;
          }
          if (id != 0) {
            if (y == 127) {
              break;
            }
            world.getBlockAt(x,y + 1,z).setTypeId(78);
            break;
          }
        }
      }
    }
  }
 else   if (material == EnumBowMaterial.FIRE) {
    World world=getBukkitEntity().getWorld();
    world.getBlockAt((int)locX,(int)locY,(int)locZ).setType(Material.FIRE);
  }
 else   if (material == EnumBowMaterial.TNT) {
    EntityTNTPrimed tnt=new EntityTNTPrimed(this.world,locX,locY,locZ);
    tnt.a=0;
    world.addEntity(tnt);
    tnt.f_();
  }
 else   if (material == EnumBowMaterial.THUNDER) {
    World world=getBukkitEntity().getWorld();
    world.strikeLightning(new Location(world,locX,locY,locZ));
  }
 else   if (material == EnumBowMaterial.MONSTER) {
    World world=getBukkitEntity().getWorld();
    CreatureType[] types={CreatureType.CREEPER,CreatureType.SKELETON,CreatureType.SLIME,CreatureType.SPIDER,CreatureType.ZOMBIE};
    world.spawnCreature(getBukkitEntity().getLocation(),types[(new Random()).nextInt(5)]);
  }
 else   if (material == EnumBowMaterial.TREE) {
    World world=getBukkitEntity().getWorld();
    Location loc=getBukkitEntity().getLocation();
    world.generateTree(loc,TreeType.TREE);
  }
 else   if (material == EnumBowMaterial.ZEUS) {
    Location loc=getBukkitEntity().getLocation();
    World worldf=loc.getWorld();
    worldf.strikeLightning(loc);
    loc.getBlock().setType(Material.FIRE);
    EntityTNTPrimed tnt=new EntityTNTPrimed(this.world,locX,locY,locZ);
    tnt.a=0;
    world.addEntity(tnt);
    tnt.f_();
  }
 else   if (material == EnumBowMaterial.THRICE) {
    die();
  }
}