Program: 84368
Project: 84368
Buggy source:
public int loop(){
  final RSTile curr_base=game.getMapBase();
  if (lb != null && lb.equals(curr_base)) {
    return -1;
  }
  sleep(5000);
  lb=curr_base;
  Node t;
  final int flags[][]=walking.getCollisionFlags(game.getPlane());
  for (int i=0; i < 104; i++) {
    for (int j=0; j < 104; j++) {
      RSTile start=new RSTile(curr_base.getX() + i,curr_base.getY() + j);
      int base_x=game.getBaseX(), base_y=game.getBaseY();
      int curr_x=start.getX() - base_x, curr_y=start.getY() - base_y;
      t=new Node(curr_x,curr_y);
      RSTile offset=walking.getCollisionOffset(game.getPlane());
      int off_x=offset.getX();
      int off_y=offset.getY();
      int x=t.x, y=t.y;
      int f_x=x - off_x, f_y=y - off_y;
      int here=flags[f_x][f_y];
      TileFlags tI=new TileFlags(start);
      if ((here & TileFlags.Flags.WALL_EAST) != 0) {
        tI.addKey(TileFlags.Keys.WALL_EAST);
      }
      if ((here & TileFlags.Flags.WALL_WEST) != 0) {
        tI.addKey(TileFlags.Keys.WALL_WEST);
      }
      if ((here & TileFlags.Flags.WALL_NORTH) != 0) {
        tI.addKey(TileFlags.Keys.WALL_NORTH);
      }
      if ((here & TileFlags.Flags.WALL_SOUTH) != 0) {
        tI.addKey(TileFlags.Keys.WALL_SOUTH);
      }
      if ((here & TileFlags.Flags.WALL_NORTH_EAST) != 0) {
        tI.addKey(TileFlags.Keys.WALL_NORTH_EAST);
      }
      if ((here & TileFlags.Flags.WALL_NORTH_WEST) != 0) {
        tI.addKey(TileFlags.Keys.WALL_NORTH_WEST);
      }
      if ((here & TileFlags.Flags.WALL_SOUTH_EAST) != 0) {
        tI.addKey(TileFlags.Keys.WALL_SOUTH_EAST);
      }
      if ((here & TileFlags.Flags.WALL_SOUTH_WEST) != 0) {
        tI.addKey(TileFlags.Keys.WALL_SOUTH_WEST);
      }
      if ((here & TileFlags.Flags.BLOCKED) != 0) {
        tI.addKey(TileFlags.Keys.BLOCKED);
      }
      if ((here & TileFlags.Flags.WATER) != 0) {
        tI.addKey(TileFlags.Keys.TILE_WATER);
      }
      if (!tI.isBlocked()) {
        tI.addKey(TileFlags.Keys.TILE_CLEAR);
      }
      if (!WebQueue.rs_map.containsKey(start) && f_y > 0 && f_x < 103) {
        WebQueue.rs_map.put(start,tI);
      }
 else {
        if (!WebQueue.rs_map.get(start).equals(tI)) {
          WebQueue.rs_map.remove(start);
        }
      }
    }
  }
  return -1;
}

Fixed version (ground truth):
public int loop(){
  final RSTile curr_base=game.getMapBase();
  if (lb != null && lb.equals(curr_base)) {
    return -1;
  }
  sleep(5000);
  lb=curr_base;
  Node t;
  log("String_Node_Str");
  final int flags[][]=walking.getCollisionFlags(game.getPlane());
  for (int i=0; i < 104; i++) {
    for (int j=0; j < 104; j++) {
      RSTile start=new RSTile(curr_base.getX() + i,curr_base.getY() + j);
      int base_x=game.getBaseX(), base_y=game.getBaseY();
      int curr_x=start.getX() - base_x, curr_y=start.getY() - base_y;
      t=new Node(curr_x,curr_y);
      RSTile offset=walking.getCollisionOffset(game.getPlane());
      int off_x=offset.getX();
      int off_y=offset.getY();
      int x=t.x, y=t.y;
      int f_x=x - off_x, f_y=y - off_y;
      int here=flags[f_x][f_y];
      TileFlags tI=new TileFlags(start);
      if ((here & TileFlags.Flags.WALL_EAST) != 0) {
        tI.addKey(TileFlags.Keys.WALL_EAST);
      }
      if ((here & TileFlags.Flags.WALL_WEST) != 0) {
        tI.addKey(TileFlags.Keys.WALL_WEST);
      }
      if ((here & TileFlags.Flags.WALL_NORTH) != 0) {
        tI.addKey(TileFlags.Keys.WALL_NORTH);
      }
      if ((here & TileFlags.Flags.WALL_SOUTH) != 0) {
        tI.addKey(TileFlags.Keys.WALL_SOUTH);
      }
      if ((here & TileFlags.Flags.WALL_NORTH_EAST) != 0) {
        tI.addKey(TileFlags.Keys.WALL_NORTH_EAST);
      }
      if ((here & TileFlags.Flags.WALL_NORTH_WEST) != 0) {
        tI.addKey(TileFlags.Keys.WALL_NORTH_WEST);
      }
      if ((here & TileFlags.Flags.WALL_SOUTH_EAST) != 0) {
        tI.addKey(TileFlags.Keys.WALL_SOUTH_EAST);
      }
      if ((here & TileFlags.Flags.WALL_SOUTH_WEST) != 0) {
        tI.addKey(TileFlags.Keys.WALL_SOUTH_WEST);
      }
      if ((here & TileFlags.Flags.BLOCKED) != 0) {
        tI.addKey(TileFlags.Keys.BLOCKED);
      }
      if ((here & TileFlags.Flags.WATER) != 0) {
        tI.addKey(TileFlags.Keys.TILE_WATER);
      }
      if (!tI.isBlocked()) {
        tI.addKey(TileFlags.Keys.TILE_CLEAR);
      }
      if (!Web.map.containsKey(start) && f_y > 0 && f_x < 103) {
        rs_map.put(start,tI);
      }
 else {
        if (!Web.map.get(start).equals(tI)) {
          Web.map.remove(start);
        }
      }
    }
  }
  WebQueue.Add(rs_map);
  return -1;
}