Program: 133887
Project: 133887
Buggy source:
@SuppressWarnings("String_Node_Str") private void advanceSwipe(){
  affectedEntities.clear();
  for (  Vector direction : elements.keySet()) {
    Location location=elements.get(direction);
    if (direction != null && location != null) {
      location=location.clone().add(direction.clone().multiply(speed));
      elements.put(direction,location);
      if (location.distanceSquared(origin) > range * range || GeneralMethods.isRegionProtectedFromBuild(this,location)) {
        elements.remove(direction);
      }
 else {
        removeAirSpouts(location,player);
        WaterAbility.removeWaterSpouts(location,player);
        if (EarthBlast.annihilateBlasts(location,radius,player) || WaterManipulation.annihilateBlasts(location,radius,player) || FireBlast.annihilateBlasts(location,radius,player)|| Combustion.removeAroundPoint(location,radius)) {
          elements.remove(direction);
          damage=0;
          remove();
          continue;
        }
        Block block=location.getBlock();
        for (        Block testblock : GeneralMethods.getBlocksAroundPoint(location,radius)) {
          if (testblock.getType() == Material.FIRE) {
            testblock.setType(Material.AIR);
          }
          if (isBlockBreakable(testblock)) {
            GeneralMethods.breakBlock(testblock);
          }
        }
        if (block.getType() != Material.AIR) {
          if (isBlockBreakable(block)) {
            GeneralMethods.breakBlock(block);
          }
 else {
            elements.remove(direction);
          }
          if (isLava(block)) {
            if (block.getData() == 0x0) {
              block.setType(Material.OBSIDIAN);
            }
 else {
              block.setType(Material.COBBLESTONE);
            }
          }
        }
 else {
          playAirbendingParticles(location,particles,0.2F,0.2F,0);
          if (random.nextInt(4) == 0) {
            playAirbendingSound(location);
          }
          affectPeople(location,direction);
        }
      }
    }
  }
  if (elements.isEmpty()) {
    remove();
  }
}

Fixed version (ground truth):
@SuppressWarnings("String_Node_Str") private void advanceSwipe(){
  affectedEntities.clear();
  for (  Vector direction : elements.keySet()) {
    Location location=elements.get(direction);
    if (direction != null && location != null) {
      location=location.clone().add(direction.clone().multiply(speed));
      elements.put(direction,location);
      if (location.distanceSquared(origin) > range * range || GeneralMethods.isRegionProtectedFromBuild(this,location)) {
        elements.remove(direction);
      }
 else {
        removeAirSpouts(location,player);
        WaterAbility.removeWaterSpouts(location,player);
        EarthAbility.removeSandSpouts(location,player);
        if (EarthBlast.annihilateBlasts(location,radius,player) || WaterManipulation.annihilateBlasts(location,radius,player) || FireBlast.annihilateBlasts(location,radius,player)|| Combustion.removeAroundPoint(location,radius)) {
          elements.remove(direction);
          damage=0;
          remove();
          continue;
        }
        Block block=location.getBlock();
        for (        Block testblock : GeneralMethods.getBlocksAroundPoint(location,radius)) {
          if (testblock.getType() == Material.FIRE) {
            testblock.setType(Material.AIR);
          }
          if (isBlockBreakable(testblock)) {
            GeneralMethods.breakBlock(testblock);
          }
        }
        if (block.getType() != Material.AIR) {
          if (isBlockBreakable(block)) {
            GeneralMethods.breakBlock(block);
          }
 else {
            elements.remove(direction);
          }
          if (isLava(block)) {
            if (block.getData() == 0x0) {
              block.setType(Material.OBSIDIAN);
            }
 else {
              block.setType(Material.COBBLESTONE);
            }
          }
        }
 else {
          playAirbendingParticles(location,particles,0.2F,0.2F,0);
          if (random.nextInt(4) == 0) {
            playAirbendingSound(location);
          }
          affectPeople(location,direction);
        }
      }
    }
  }
  if (elements.isEmpty()) {
    remove();
  }
}