Program: 10379
Project: 10379
Buggy source:
@EventHandler public void entityDamage(EntityDamageEvent event){
  Map<String,dObject> context=new HashMap<String,dObject>();
  boolean isFatal=false;
  dEntity entity=new dEntity(event.getEntity());
  String entityType=entity.getEntityType().name();
  String cause=event.getCause().name();
  String determination;
  dPlayer player=null;
  dNPC npc=null;
  if (entity.isNPC()) {
    npc=new dNPC(entity.getNPC());
    context.put("String_Node_Str",npc);
    entityType="String_Node_Str";
  }
 else   if (entity.isPlayer()) {
    player=new dPlayer(entity.getPlayer());
    context.put("String_Node_Str",player);
  }
 else {
    context.put("String_Node_Str",entity);
  }
  context.put("String_Node_Str",new Element(event.getDamage()));
  context.put("String_Node_Str",new Element(event.getCause().name()));
  if (entity instanceof LivingEntity) {
    if (event.getDamage() >= ((LivingEntity)entity).getHealth()) {
      isFatal=true;
    }
  }
  List<String> events=new ArrayList<String>();
  events.add("String_Node_Str");
  events.add("String_Node_Str" + cause);
  events.add(entityType + "String_Node_Str");
  events.add(entityType + "String_Node_Str" + cause);
  if (isFatal) {
    events.add("String_Node_Str");
    events.add("String_Node_Str" + cause);
    events.add(entityType + "String_Node_Str");
    events.add(entityType + "String_Node_Str" + cause);
  }
  if (event instanceof EntityDamageByEntityEvent) {
    EntityDamageByEntityEvent subEvent=(EntityDamageByEntityEvent)event;
    dPlayer subPlayer=null;
    dNPC subNPC=null;
    dEntity damager=new dEntity(subEvent.getDamager());
    String damagerType=damager.getEntityType().name();
    if (damager.isNPC()) {
      subNPC=new dNPC(damager.getNPC());
      context.put("String_Node_Str",subNPC);
      damagerType="String_Node_Str";
      if (npc == null)       npc=subNPC;
    }
 else     if (damager.isPlayer()) {
      subPlayer=new dPlayer(damager.getPlayer());
      context.put("String_Node_Str",subPlayer);
      if (player == null)       player=subPlayer;
    }
 else {
      context.put("String_Node_Str",damager);
      if (damager.getBukkitEntity() instanceof Projectile) {
        if (((Projectile)damager.getBukkitEntity()).getShooter() != null) {
          dEntity shooter=new dEntity(((Projectile)damager.getBukkitEntity()).getShooter());
          if (shooter.isNPC()) {
            context.put("String_Node_Str",new dNPC(shooter.getNPC()));
          }
 else           if (shooter.isPlayer()) {
            context.put("String_Node_Str",new dPlayer(shooter.getPlayer()));
          }
 else {
            context.put("String_Node_Str",shooter);
          }
        }
 else {
          context.put("String_Node_Str",new Element("String_Node_Str"));
        }
      }
    }
    events.add("String_Node_Str");
    events.add("String_Node_Str" + damagerType);
    events.add(entityType + "String_Node_Str");
    events.add(entityType + "String_Node_Str" + damagerType);
    List<String> subEvents=new ArrayList<String>();
    subEvents.add("String_Node_Str");
    subEvents.add("String_Node_Str" + entityType);
    subEvents.add(damagerType + "String_Node_Str");
    subEvents.add(damagerType + "String_Node_Str" + entityType);
    if (isFatal) {
      events.add("String_Node_Str");
      events.add("String_Node_Str" + damagerType);
      events.add(entityType + "String_Node_Str");
      events.add(entityType + "String_Node_Str" + damagerType);
      subEvents.add("String_Node_Str");
      subEvents.add("String_Node_Str" + entityType);
      subEvents.add(damagerType + "String_Node_Str");
      subEvents.add(damagerType + "String_Node_Str" + entityType);
    }
    determination=doEvents(subEvents,(subNPC != null ? subNPC : null),(subPlayer != null ? subPlayer.getPlayerEntity() : null),context);
    if (determination.toUpperCase().startsWith("String_Node_Str"))     event.setCancelled(true);
 else     if (Argument.valueOf(determination).matchesPrimitive(aH.PrimitiveType.Double)) {
      event.setDamage(aH.getDoubleFrom(determination));
    }
  }
  determination=doEvents(events,(npc != null ? npc : null),(player != null && player.isOnline() ? player.getPlayerEntity() : null),context);
  if (determination.toUpperCase().startsWith("String_Node_Str"))   event.setCancelled(true);
 else   if (Argument.valueOf(determination).matchesPrimitive(aH.PrimitiveType.Double)) {
    event.setDamage(aH.getDoubleFrom(determination));
  }
}

Fixed version (ground truth):
@EventHandler public void entityDamage(EntityDamageEvent event){
  Map<String,dObject> context=new HashMap<String,dObject>();
  boolean isFatal=false;
  dEntity entity=new dEntity(event.getEntity());
  String entityType=entity.getEntityType().name();
  String cause=event.getCause().name();
  String determination;
  dPlayer player=null;
  dNPC npc=null;
  if (entity.isNPC()) {
    npc=new dNPC(entity.getNPC());
    context.put("String_Node_Str",npc);
    entityType="String_Node_Str";
  }
 else   if (entity.isPlayer()) {
    player=new dPlayer(entity.getPlayer());
    context.put("String_Node_Str",player);
  }
 else {
    context.put("String_Node_Str",entity);
  }
  context.put("String_Node_Str",new Element(event.getDamage()));
  context.put("String_Node_Str",new Element(event.getCause().name()));
  if (entity.getLivingEntity() != null) {
    if (event.getDamage() >= entity.getLivingEntity().getHealth()) {
      isFatal=true;
    }
  }
  List<String> events=new ArrayList<String>();
  events.add("String_Node_Str");
  events.add("String_Node_Str" + cause);
  events.add(entityType + "String_Node_Str");
  events.add(entityType + "String_Node_Str" + cause);
  if (isFatal) {
    events.add("String_Node_Str");
    events.add("String_Node_Str" + cause);
    events.add(entityType + "String_Node_Str");
    events.add(entityType + "String_Node_Str" + cause);
  }
  if (event instanceof EntityDamageByEntityEvent) {
    EntityDamageByEntityEvent subEvent=(EntityDamageByEntityEvent)event;
    dPlayer subPlayer=null;
    dNPC subNPC=null;
    dEntity damager=new dEntity(subEvent.getDamager());
    String damagerType=damager.getEntityType().name();
    if (damager.isNPC()) {
      subNPC=new dNPC(damager.getNPC());
      context.put("String_Node_Str",subNPC);
      damagerType="String_Node_Str";
      if (npc == null)       npc=subNPC;
    }
 else     if (damager.isPlayer()) {
      subPlayer=new dPlayer(damager.getPlayer());
      context.put("String_Node_Str",subPlayer);
      if (player == null)       player=subPlayer;
    }
 else {
      context.put("String_Node_Str",damager);
      if (damager.getBukkitEntity() instanceof Projectile) {
        if (((Projectile)damager.getBukkitEntity()).getShooter() != null) {
          dEntity shooter=new dEntity(((Projectile)damager.getBukkitEntity()).getShooter());
          if (shooter.isNPC()) {
            context.put("String_Node_Str",new dNPC(shooter.getNPC()));
          }
 else           if (shooter.isPlayer()) {
            context.put("String_Node_Str",new dPlayer(shooter.getPlayer()));
          }
 else {
            context.put("String_Node_Str",shooter);
          }
        }
 else {
          context.put("String_Node_Str",new Element("String_Node_Str"));
        }
      }
    }
    events.add("String_Node_Str");
    events.add("String_Node_Str" + damagerType);
    events.add(entityType + "String_Node_Str");
    events.add(entityType + "String_Node_Str" + damagerType);
    List<String> subEvents=new ArrayList<String>();
    subEvents.add("String_Node_Str");
    subEvents.add("String_Node_Str" + entityType);
    subEvents.add(damagerType + "String_Node_Str");
    subEvents.add(damagerType + "String_Node_Str" + entityType);
    if (isFatal) {
      events.add("String_Node_Str");
      events.add("String_Node_Str" + damagerType);
      events.add(entityType + "String_Node_Str");
      events.add(entityType + "String_Node_Str" + damagerType);
      subEvents.add("String_Node_Str");
      subEvents.add("String_Node_Str" + entityType);
      subEvents.add(damagerType + "String_Node_Str");
      subEvents.add(damagerType + "String_Node_Str" + entityType);
    }
    determination=doEvents(subEvents,(subNPC != null ? subNPC : null),(subPlayer != null ? subPlayer.getPlayerEntity() : null),context);
    if (determination.toUpperCase().startsWith("String_Node_Str"))     event.setCancelled(true);
 else     if (Argument.valueOf(determination).matchesPrimitive(aH.PrimitiveType.Double)) {
      event.setDamage(aH.getDoubleFrom(determination));
    }
  }
  determination=doEvents(events,(npc != null ? npc : null),(player != null && player.isOnline() ? player.getPlayerEntity() : null),context);
  if (determination.toUpperCase().startsWith("String_Node_Str"))   event.setCancelled(true);
 else   if (Argument.valueOf(determination).matchesPrimitive(aH.PrimitiveType.Double)) {
    event.setDamage(aH.getDoubleFrom(determination));
  }
}