Program: 10129
Project: 10129
Buggy source:
@Override public void adjust(Mechanism mechanism){
  Element value=mechanism.getValue();
  if (mechanism.matches("String_Node_Str") && mechanism.requireObject(dScript.class)) {
    getAssignmentTrait().setAssignment(value.asType(dScript.class).getName(),null);
  }
  if (mechanism.matches("String_Node_Str")) {
    getAssignmentTrait().removeAssignment(null);
  }
  if (mechanism.matches("String_Node_Str")) {
    getNicknameTrait().setNickname(value.asString());
  }
  if (mechanism.matches("String_Node_Str")) {
    getNicknameTrait().removeNickname();
  }
  if (mechanism.matches("String_Node_Str") && mechanism.requireObject(dEntity.class)) {
    getCitizen().setBukkitEntityType(value.asType(dEntity.class).getBukkitEntityType());
  }
  if (mechanism.matches("String_Node_Str") || mechanism.matches("String_Node_Str")) {
    getCitizen().setName(value.asString().length() > 64 ? value.asString().substring(0,64) : value.asString());
  }
  if (mechanism.matches("String_Node_Str")) {
    getCitizen().getTrait(Owner.class).setOwner(value.asString());
  }
  if (mechanism.matches("String_Node_Str")) {
    if (!mechanism.hasValue()) {
      getCitizen().data().remove("String_Node_Str");
      getCitizen().data().remove(NPC.PLAYER_SKIN_TEXTURE_PROPERTIES_METADATA);
      getCitizen().data().remove(NPC.PLAYER_SKIN_TEXTURE_PROPERTIES_SIGN_METADATA);
      if (getCitizen().isSpawned()) {
        getCitizen().despawn(DespawnReason.PENDING_RESPAWN);
        getCitizen().spawn(getCitizen().getStoredLocation());
      }
    }
 else {
      String[] dat=mechanism.getValue().asString().split("String_Node_Str");
      getCitizen().data().remove("String_Node_Str");
      getCitizen().data().setPersistent(NPC.PLAYER_SKIN_TEXTURE_PROPERTIES_METADATA,dat[0]);
      getCitizen().data().setPersistent(NPC.PLAYER_SKIN_TEXTURE_PROPERTIES_SIGN_METADATA,dat.length > 0 ? dat[1] : null);
      if (dat.length > 1) {
        getCitizen().data().setPersistent(NPC.PLAYER_SKIN_UUID_METADATA,dat[2]);
      }
      if (getCitizen().isSpawned() && getCitizen().getEntity() instanceof SkinnableEntity) {
        ((SkinnableEntity)getCitizen().getEntity()).setSkinPersistent(dat.length > 1 ? dat[2] : "String_Node_Str",dat.length > 0 ? dat[1] : null,dat[0]);
        ((SkinnableEntity)getCitizen().getEntity()).getSkinTracker().notifySkinChange(true);
      }
    }
  }
  if (mechanism.matches("String_Node_Str")) {
    if (!mechanism.hasValue()) {
      getCitizen().data().remove(NPC.PLAYER_SKIN_UUID_METADATA);
    }
 else {
      getCitizen().data().setPersistent(NPC.PLAYER_SKIN_UUID_METADATA,mechanism.getValue().asString());
    }
    if (getCitizen().isSpawned()) {
      getCitizen().despawn(DespawnReason.PENDING_RESPAWN);
      getCitizen().spawn(getCitizen().getStoredLocation());
    }
  }
  if (mechanism.matches("String_Node_Str") && mechanism.requireObject(dItem.class)) {
    dItem item=mechanism.getValue().asType(dItem.class);
    Material mat=item.getMaterial().getMaterial();
    int data=item.getMaterial().getData((byte)0);
switch (getEntity().getType()) {
case DROPPED_ITEM:
      ((org.bukkit.entity.Item)getEntity()).getItemStack().setType(mat);
    break;
case ITEM_FRAME:
  ((ItemFrame)getEntity()).getItem().setType(mat);
break;
case FALLING_BLOCK:
break;
default :
dB.echoError("String_Node_Str");
break;
}
if (getCitizen().isSpawned()) {
getCitizen().despawn();
getCitizen().spawn(getCitizen().getStoredLocation());
}
}
if (mechanism.matches("String_Node_Str")) {
if (mechanism.requireObject("String_Node_Str",dLocation.class)) {
getCitizen().spawn(value.asType(dLocation.class));
}
 else {
getCitizen().spawn(getCitizen().getStoredLocation());
}
}
if (mechanism.matches("String_Node_Str") && mechanism.requireFloat()) {
getCitizen().getNavigator().getDefaultParameters().range(mechanism.getValue().asFloat());
}
if (mechanism.matches("String_Node_Str") && mechanism.requireFloat()) {
getCitizen().getNavigator().getDefaultParameters().attackRange(mechanism.getValue().asFloat());
}
if (mechanism.matches("String_Node_Str") && mechanism.requireFloat()) {
getCitizen().getNavigator().getDefaultParameters().speedModifier(mechanism.getValue().asFloat());
}
if (mechanism.matches("String_Node_Str")) {
getCitizen().despawn(DespawnReason.PLUGIN);
}
if (mechanism.matches("String_Node_Str") && mechanism.requireBoolean()) {
getCitizen().setProtected(value.asBoolean());
}
if (mechanism.matches("String_Node_Str") && mechanism.requireBoolean()) {
getLookCloseTrait().lookClose(value.asBoolean());
}
if (mechanism.matches("String_Node_Str")) {
if (mechanism.getValue().toString().equalsIgnoreCase("String_Node_Str")) {
getNavigator().getLocalParameters().clearExaminers();
getNavigator().getLocalParameters().examiner(new MinecraftBlockExaminer());
}
 else if (mechanism.getValue().toString().equalsIgnoreCase("String_Node_Str")) {
getNavigator().getLocalParameters().clearExaminers();
getNavigator().getLocalParameters().examiner(new FlyingBlockExaminer());
}
 else if (mechanism.getValue().toString().equalsIgnoreCase("String_Node_Str")) {
getNavigator().getLocalParameters().clearExaminers();
getNavigator().getLocalParameters().examiner(new PathBlockExaminer(this,null));
}
}
if (mechanism.matches("String_Node_Str") && mechanism.requireBoolean()) {
if (value.asBoolean()) {
getNavigator().getDefaultParameters().stuckAction(TeleportStuckAction.INSTANCE);
}
 else {
getNavigator().getDefaultParameters().stuckAction(null);
}
}
if (mechanism.matches("String_Node_Str") && mechanism.requireDouble()) {
getNavigator().getDefaultParameters().distanceMargin(mechanism.getValue().asDouble());
}
if (mechanism.matches("String_Node_Str") && mechanism.requireObject(dLocation.class)) {
if (!getCitizen().hasTrait(Waypoints.class)) {
getCitizen().addTrait(Waypoints.class);
}
Waypoints wp=getCitizen().getTrait(Waypoints.class);
if ((wp.getCurrentProvider() instanceof WaypointProvider.EnumerableWaypointProvider)) {
((List<Waypoint>)((WaypointProvider.EnumerableWaypointProvider)wp.getCurrentProvider()).waypoints()).add(new Waypoint(value.asType(dLocation.class)));
}
}
for (Property property : PropertyParser.getProperties(this)) {
property.adjust(mechanism);
if (mechanism.fulfilled()) {
break;
}
}
if (!mechanism.fulfilled()) {
if (isSpawned()) {
new dEntity(getEntity()).adjust(mechanism);
}
 else {
mechanism.reportInvalid();
}
}
}

Fixed version (ground truth):
@Override public void adjust(Mechanism mechanism){
  Element value=mechanism.getValue();
  if (mechanism.matches("String_Node_Str") && mechanism.requireObject(dScript.class)) {
    getAssignmentTrait().setAssignment(value.asType(dScript.class).getName(),null);
  }
  if (mechanism.matches("String_Node_Str")) {
    getAssignmentTrait().removeAssignment(null);
  }
  if (mechanism.matches("String_Node_Str")) {
    getNicknameTrait().setNickname(value.asString());
  }
  if (mechanism.matches("String_Node_Str")) {
    getNicknameTrait().removeNickname();
  }
  if (mechanism.matches("String_Node_Str") && mechanism.requireObject(dEntity.class)) {
    getCitizen().setBukkitEntityType(value.asType(dEntity.class).getBukkitEntityType());
  }
  if (mechanism.matches("String_Node_Str") || mechanism.matches("String_Node_Str")) {
    getCitizen().setName(value.asString().length() > 64 ? value.asString().substring(0,64) : value.asString());
  }
  if (mechanism.matches("String_Node_Str")) {
    getCitizen().getTrait(Owner.class).setOwner(value.asString());
  }
  if (mechanism.matches("String_Node_Str")) {
    if (!mechanism.hasValue()) {
      getCitizen().data().remove("String_Node_Str");
      getCitizen().data().remove(NPC.PLAYER_SKIN_TEXTURE_PROPERTIES_METADATA);
      getCitizen().data().remove(NPC.PLAYER_SKIN_TEXTURE_PROPERTIES_SIGN_METADATA);
      if (getCitizen().isSpawned()) {
        getCitizen().despawn(DespawnReason.PENDING_RESPAWN);
        getCitizen().spawn(getCitizen().getStoredLocation());
      }
    }
 else {
      String[] dat=mechanism.getValue().asString().split("String_Node_Str");
      getCitizen().data().remove("String_Node_Str");
      getCitizen().data().setPersistent(NPC.PLAYER_SKIN_TEXTURE_PROPERTIES_METADATA,dat[0]);
      getCitizen().data().setPersistent(NPC.PLAYER_SKIN_TEXTURE_PROPERTIES_SIGN_METADATA,dat.length > 1 ? dat[1] : null);
      if (dat.length > 2) {
        getCitizen().data().setPersistent(NPC.PLAYER_SKIN_UUID_METADATA,dat[2]);
      }
      if (getCitizen().isSpawned() && getCitizen().getEntity() instanceof SkinnableEntity) {
        ((SkinnableEntity)getCitizen().getEntity()).setSkinPersistent(dat.length > 2 ? dat[2] : "String_Node_Str",dat.length > 1 ? dat[1] : null,dat[0]);
        ((SkinnableEntity)getCitizen().getEntity()).getSkinTracker().notifySkinChange(true);
      }
    }
  }
  if (mechanism.matches("String_Node_Str")) {
    if (!mechanism.hasValue()) {
      getCitizen().data().remove(NPC.PLAYER_SKIN_UUID_METADATA);
    }
 else {
      getCitizen().data().setPersistent(NPC.PLAYER_SKIN_UUID_METADATA,mechanism.getValue().asString());
    }
    if (getCitizen().isSpawned()) {
      getCitizen().despawn(DespawnReason.PENDING_RESPAWN);
      getCitizen().spawn(getCitizen().getStoredLocation());
    }
  }
  if (mechanism.matches("String_Node_Str") && mechanism.requireObject(dItem.class)) {
    dItem item=mechanism.getValue().asType(dItem.class);
    Material mat=item.getMaterial().getMaterial();
    int data=item.getMaterial().getData((byte)0);
switch (getEntity().getType()) {
case DROPPED_ITEM:
      ((org.bukkit.entity.Item)getEntity()).getItemStack().setType(mat);
    break;
case ITEM_FRAME:
  ((ItemFrame)getEntity()).getItem().setType(mat);
break;
case FALLING_BLOCK:
break;
default :
dB.echoError("String_Node_Str");
break;
}
if (getCitizen().isSpawned()) {
getCitizen().despawn();
getCitizen().spawn(getCitizen().getStoredLocation());
}
}
if (mechanism.matches("String_Node_Str")) {
if (mechanism.requireObject("String_Node_Str",dLocation.class)) {
getCitizen().spawn(value.asType(dLocation.class));
}
 else {
getCitizen().spawn(getCitizen().getStoredLocation());
}
}
if (mechanism.matches("String_Node_Str") && mechanism.requireFloat()) {
getCitizen().getNavigator().getDefaultParameters().range(mechanism.getValue().asFloat());
}
if (mechanism.matches("String_Node_Str") && mechanism.requireFloat()) {
getCitizen().getNavigator().getDefaultParameters().attackRange(mechanism.getValue().asFloat());
}
if (mechanism.matches("String_Node_Str") && mechanism.requireFloat()) {
getCitizen().getNavigator().getDefaultParameters().speedModifier(mechanism.getValue().asFloat());
}
if (mechanism.matches("String_Node_Str")) {
getCitizen().despawn(DespawnReason.PLUGIN);
}
if (mechanism.matches("String_Node_Str") && mechanism.requireBoolean()) {
getCitizen().setProtected(value.asBoolean());
}
if (mechanism.matches("String_Node_Str") && mechanism.requireBoolean()) {
getLookCloseTrait().lookClose(value.asBoolean());
}
if (mechanism.matches("String_Node_Str")) {
if (mechanism.getValue().toString().equalsIgnoreCase("String_Node_Str")) {
getNavigator().getLocalParameters().clearExaminers();
getNavigator().getLocalParameters().examiner(new MinecraftBlockExaminer());
}
 else if (mechanism.getValue().toString().equalsIgnoreCase("String_Node_Str")) {
getNavigator().getLocalParameters().clearExaminers();
getNavigator().getLocalParameters().examiner(new FlyingBlockExaminer());
}
 else if (mechanism.getValue().toString().equalsIgnoreCase("String_Node_Str")) {
getNavigator().getLocalParameters().clearExaminers();
getNavigator().getLocalParameters().examiner(new PathBlockExaminer(this,null));
}
}
if (mechanism.matches("String_Node_Str") && mechanism.requireBoolean()) {
if (value.asBoolean()) {
getNavigator().getDefaultParameters().stuckAction(TeleportStuckAction.INSTANCE);
}
 else {
getNavigator().getDefaultParameters().stuckAction(null);
}
}
if (mechanism.matches("String_Node_Str") && mechanism.requireDouble()) {
getNavigator().getDefaultParameters().distanceMargin(mechanism.getValue().asDouble());
}
if (mechanism.matches("String_Node_Str") && mechanism.requireObject(dLocation.class)) {
if (!getCitizen().hasTrait(Waypoints.class)) {
getCitizen().addTrait(Waypoints.class);
}
Waypoints wp=getCitizen().getTrait(Waypoints.class);
if ((wp.getCurrentProvider() instanceof WaypointProvider.EnumerableWaypointProvider)) {
((List<Waypoint>)((WaypointProvider.EnumerableWaypointProvider)wp.getCurrentProvider()).waypoints()).add(new Waypoint(value.asType(dLocation.class)));
}
}
for (Property property : PropertyParser.getProperties(this)) {
property.adjust(mechanism);
if (mechanism.fulfilled()) {
break;
}
}
if (!mechanism.fulfilled()) {
if (isSpawned()) {
new dEntity(getEntity()).adjust(mechanism);
}
 else {
mechanism.reportInvalid();
}
}
}