Program: 10360
Project: 10360
Buggy source:
@EventHandler public void playerInteract(PlayerInteractEvent event){
  Map<String,dObject> context=new HashMap<String,dObject>();
  Action action=event.getAction();
  dItem item=null;
  dMaterial itemMaterial=null;
  List<String> events=new ArrayList<String>();
  String interaction;
  if (action == Action.LEFT_CLICK_AIR || action == Action.LEFT_CLICK_BLOCK)   interaction="String_Node_Str";
 else   if (action == Action.RIGHT_CLICK_AIR || action == Action.RIGHT_CLICK_BLOCK)   interaction="String_Node_Str";
 else   interaction="String_Node_Str";
  events.add(interaction);
  if (event.hasItem()) {
    item=new dItem(event.getItem());
    itemMaterial=item.getMaterial();
    context.put("String_Node_Str",item);
    events.add(interaction + "String_Node_Str");
    events.add(interaction + "String_Node_Str" + item.identify());
    events.add(interaction + "String_Node_Str" + itemMaterial.identify());
  }
  if (event.hasBlock()) {
    Block block=event.getClickedBlock();
    dMaterial blockMaterial=new dMaterial(block.getType());
    context.put("String_Node_Str",new dLocation(block.getLocation()));
    events.add(interaction + "String_Node_Str");
    events.add(interaction + "String_Node_Str" + blockMaterial.identify());
    if (event.hasItem()) {
      events.add(interaction + "String_Node_Str");
      events.add(interaction + "String_Node_Str" + item.identify());
      events.add(interaction + "String_Node_Str" + itemMaterial.identify());
      events.add(interaction + "String_Node_Str" + blockMaterial.identify()+ "String_Node_Str");
      events.add(interaction + "String_Node_Str" + blockMaterial.identify()+ "String_Node_Str"+ item.identify());
      events.add(interaction + "String_Node_Str" + blockMaterial.identify()+ "String_Node_Str"+ itemMaterial.identify());
    }
  }
  String determination=doEvents(events,null,event.getPlayer(),context);
  if (determination.toUpperCase().startsWith("String_Node_Str"))   event.setCancelled(true);
}

Fixed version (ground truth):
@EventHandler public void playerInteract(PlayerInteractEvent event){
  Map<String,dObject> context=new HashMap<String,dObject>();
  Action action=event.getAction();
  dItem item=null;
  dMaterial itemMaterial=null;
  List<String> events=new ArrayList<String>();
  String interaction;
  if (action == Action.LEFT_CLICK_AIR || action == Action.LEFT_CLICK_BLOCK)   interaction="String_Node_Str";
 else   if (action == Action.RIGHT_CLICK_AIR || action == Action.RIGHT_CLICK_BLOCK)   interaction="String_Node_Str";
 else   interaction="String_Node_Str";
  events.add(interaction);
  if (event.hasItem()) {
    item=new dItem(event.getItem());
    itemMaterial=item.getMaterial();
    context.put("String_Node_Str",item);
    events.add(interaction + "String_Node_Str");
    events.add(interaction + "String_Node_Str" + item.identify());
    events.add(interaction + "String_Node_Str" + itemMaterial.identify());
  }
  if (event.hasBlock()) {
    Block block=event.getClickedBlock();
    dMaterial blockMaterial=dMaterial.getMaterialFrom(block.getType(),block.getData());
    context.put("String_Node_Str",new dLocation(block.getLocation()));
    events.add(interaction + "String_Node_Str");
    events.add(interaction + "String_Node_Str" + blockMaterial.identify());
    if (event.hasItem()) {
      events.add(interaction + "String_Node_Str");
      events.add(interaction + "String_Node_Str" + item.identify());
      events.add(interaction + "String_Node_Str" + itemMaterial.identify());
      events.add(interaction + "String_Node_Str" + blockMaterial.identify()+ "String_Node_Str");
      events.add(interaction + "String_Node_Str" + blockMaterial.identify()+ "String_Node_Str"+ item.identify());
      events.add(interaction + "String_Node_Str" + blockMaterial.identify()+ "String_Node_Str"+ itemMaterial.identify());
    }
  }
  String determination=doEvents(events,null,event.getPlayer(),context);
  if (determination.toUpperCase().startsWith("String_Node_Str"))   event.setCancelled(true);
}