Program: 42067
Project: 42067
Buggy source:
@Override public void run(){
  if (getPlotToClear() != null) {
    IWorld world=plugin.getServerBridge().getWorld(getPlotToClear().getWorld());
    PlotMeCoreManager plotMeCoreManager=PlotMeCoreManager.getInstance();
    if (world != null) {
      if (currentClear == null) {
        currentClear=plotMeCoreManager.getGenManager(world).clear(world,getPlotToClear().getPlotId(),plugin.getServerBridge().getConfig().getInt("String_Node_Str"),null);
      }
 else {
        currentClear=plotMeCoreManager.getGenManager(world).clear(world,getPlotToClear().getPlotId(),plugin.getServerBridge().getConfig().getInt("String_Node_Str"),currentClear);
      }
      if (currentClear == null) {
        if (getPlotToClear().getReason() == ClearReason.Clear) {
          plotMeCoreManager.getGenManager(world).adjustPlotFor(world,getPlotToClear().getPlotId(),false,false,false,false);
        }
 else {
          plotMeCoreManager.getGenManager(world).adjustPlotFor(world,getPlotToClear().getPlotId(),true,false,false,false);
        }
        if (plugin.getServerBridge().getUsingLwc()) {
          plotMeCoreManager.removeLWC(world,getPlotToClear().getPlotId());
        }
        plotMeCoreManager.getGenManager(world).refreshPlotChunks(world,getPlotToClear().getPlotId());
        plottoclear.getRequester().sendMessage(plugin.getUtil().C("String_Node_Str") + "String_Node_Str" + getPlotToClear().getPlotId()+ "String_Node_Str"+ plugin.getUtil().C("String_Node_Str"));
        plugin.removePlotToClear(getPlotToClear(),plugin.getClearTaskID());
        plottoclear=null;
      }
    }
 else {
      plugin.removePlotToClear(getPlotToClear(),plugin.getClearTaskID());
      plottoclear=null;
    }
  }
}

Fixed version (ground truth):
@Override public void run(){
  if (getPlotToClear() != null) {
    IWorld world=plugin.getServerBridge().getWorld(getPlotToClear().getWorld());
    PlotMeCoreManager plotMeCoreManager=PlotMeCoreManager.getInstance();
    if (world != null) {
      if (currentClear == null) {
        currentClear=plotMeCoreManager.getGenManager(world).clear(world,getPlotToClear().getPlotId(),plugin.getServerBridge().getConfig().getInt("String_Node_Str"),null);
      }
 else {
        currentClear=plotMeCoreManager.getGenManager(world).clear(world,getPlotToClear().getPlotId(),plugin.getServerBridge().getConfig().getInt("String_Node_Str"),currentClear);
      }
      if (currentClear == null) {
        if (getPlotToClear().getReason() == ClearReason.Clear) {
          plotMeCoreManager.getGenManager(world).adjustPlotFor(world,getPlotToClear().getPlotId(),true,false,false,false);
        }
 else {
          plotMeCoreManager.getGenManager(world).adjustPlotFor(world,getPlotToClear().getPlotId(),false,false,false,false);
        }
        if (plugin.getServerBridge().getUsingLwc()) {
          plotMeCoreManager.removeLWC(world,getPlotToClear().getPlotId());
        }
        plotMeCoreManager.getGenManager(world).refreshPlotChunks(world,getPlotToClear().getPlotId());
        plottoclear.getRequester().sendMessage(plugin.getUtil().C("String_Node_Str") + "String_Node_Str" + getPlotToClear().getPlotId()+ "String_Node_Str"+ plugin.getUtil().C("String_Node_Str"));
        plugin.removePlotToClear(getPlotToClear(),plugin.getClearTaskID());
        plottoclear=null;
      }
    }
 else {
      plugin.removePlotToClear(getPlotToClear(),plugin.getClearTaskID());
      plottoclear=null;
    }
  }
}