Program: 164001
Project: 164001
Buggy source:
protected boolean getCloser(int target){
  if (rooted || target == pos) {
    return false;
  }
  int step=-1;
  if (Dungeon.level.adjacent(pos,target)) {
    path=null;
    if (Actor.findChar(target) == null && Level.passable[target]) {
      step=target;
    }
  }
 else {
    boolean newPath=false;
    if (path == null || path.isEmpty() || !Dungeon.level.adjacent(pos,path.getFirst()))     newPath=true;
 else     if (path.getLast() != target) {
      if (Dungeon.level.adjacent(target,path.getLast()) && path.size() < Dungeon.level.distance(pos,target)) {
        int last=path.removeLast();
        if (path.isEmpty()) {
          if (Dungeon.level.adjacent(target,pos)) {
            path.add(target);
          }
 else {
            path.add(last);
            path.add(target);
          }
        }
 else         if (!path.isEmpty()) {
          if (path.getLast() == target) {
          }
 else           if (Dungeon.level.adjacent(target,path.getLast())) {
            path.add(target);
          }
 else {
            path.add(last);
            path.add(target);
          }
        }
      }
 else {
        newPath=true;
      }
    }
    if (!newPath) {
      int lookAhead=(int)GameMath.gate(1,path.size() - 1,4);
      for (int i=0; i < lookAhead; i++) {
        int cell=path.get(i);
        if (!Level.passable[cell] || (Dungeon.visible[cell] && Actor.findChar(cell) != null)) {
          newPath=true;
          break;
        }
      }
    }
    if (newPath) {
      path=Dungeon.findPath(this,pos,target,Level.passable,Level.fieldOfView);
    }
    if (path == null)     return false;
    step=path.removeFirst();
  }
  if (step != -1) {
    move(step);
    return true;
  }
 else {
    return false;
  }
}

Fixed version (ground truth):
protected boolean getCloser(int target){
  if (rooted || target == pos) {
    return false;
  }
  int step=-1;
  if (Dungeon.level.adjacent(pos,target)) {
    path=null;
    if (Actor.findChar(target) == null && Level.passable[target]) {
      step=target;
    }
  }
 else {
    boolean newPath=false;
    if (path == null || path.isEmpty() || !Dungeon.level.adjacent(pos,path.getFirst()) || path.size() >= 2 * Dungeon.level.distance(pos,target))     newPath=true;
 else     if (path.getLast() != target) {
      if (Dungeon.level.adjacent(target,path.getLast())) {
        int last=path.removeLast();
        if (path.isEmpty()) {
          if (Dungeon.level.adjacent(target,pos)) {
            path.add(target);
          }
 else {
            path.add(last);
            path.add(target);
          }
        }
 else         if (!path.isEmpty()) {
          if (path.getLast() == target) {
          }
 else           if (Dungeon.level.adjacent(target,path.getLast())) {
            path.add(target);
          }
 else {
            path.add(last);
            path.add(target);
          }
        }
      }
 else {
        newPath=true;
      }
    }
    if (!newPath) {
      int lookAhead=(int)GameMath.gate(1,path.size() - 1,4);
      for (int i=0; i < lookAhead; i++) {
        int cell=path.get(i);
        if (!Level.passable[cell] || (Level.fieldOfView[cell] && Actor.findChar(cell) != null)) {
          newPath=true;
          break;
        }
      }
    }
    if (newPath) {
      path=Dungeon.findPath(this,pos,target,Level.passable,Level.fieldOfView);
    }
    if (path == null)     return false;
    step=path.removeFirst();
  }
  if (step != -1) {
    move(step);
    return true;
  }
 else {
    return false;
  }
}