Saving a block without Title set causes error with Versioned about silverstripe-blocks HOT 5 CLOSED

ERROR [User Warning]: Can't find /0 in stage Stage
IN POST /admin/pages/edit/EditForm/field/Blocks/add-multi-class/ButtonBlock/ItemEditForm
Line 790 in /vagrant/www/framework/model/Versioned.php

Source
======
  781:          $conn = DB::getConn();
  782:          if(method_exists($conn, 'allowPrimaryKeyEditing')) $conn->allowPrimaryKeyEditing($baseClass,
       true);
  783:          $from->write();
  784:          if(method_exists($conn, 'allowPrimaryKeyEditing')) $conn->allowPrimaryKeyEditing($baseClass,
       false);
  785: 
  786:          $from->destroy();
  787:          
  788:          Versioned::set_reading_mode($oldMode);
  789:      } else {
* 790:          user_error("Can't find {$this->owner->URLSegment}/{$this->owner->ID} in stage $fromStage",
       E_USER_WARNING);
  791:      }
  792:  }
  793:  
  794:  /**
  795:   * Set the migrating version.
  796:   *

Trace
=====
user_error(Can't find /0 in stage Stage,512)
Versioned.php:790

Versioned->publish(Stage,Live)

call_user_func_array(Array,Array)
Object.php:731

Object->__call(publish,Array)
GridFieldBetterButtonsItemRequest.php:275

ButtonBlock->publish(Stage,Live)
GridFieldBetterButtonsItemRequest.php:275

GridFieldBetterButtonsItemRequest->publish(Array,Form,SS_HTTPRequest)

call_user_func_array(Array,Array)
Object.php:731

Object->__call(publish,Array)
Form.php:378

GridFieldAddNewMultiClassHandler->publish(Array,Form,SS_HTTPRequest)
Form.php:378

Form->httpSubmission(SS_HTTPRequest)
RequestHandler.php:288

RequestHandler->handleAction(SS_HTTPRequest,httpSubmission)
RequestHandler.php:200

RequestHandler->handleRequest(SS_HTTPRequest,DataModel)
RequestHandler.php:222

RequestHandler->handleRequest(SS_HTTPRequest,DataModel)
GridField.php:811

GridField->handleRequest(SS_HTTPRequest,DataModel)
RequestHandler.php:222

RequestHandler->handleRequest(SS_HTTPRequest,DataModel)
RequestHandler.php:222

RequestHandler->handleRequest(SS_HTTPRequest,DataModel)
Controller.php:153

Controller->handleRequest(SS_HTTPRequest,DataModel)
LeftAndMain.php:443

LeftAndMain->handleRequest(SS_HTTPRequest,DataModel)
AdminRootController.php:93

AdminRootController->handleRequest(SS_HTTPRequest,DataModel)
Director.php:370

Director::handleRequest(SS_HTTPRequest,Session,DataModel)
Director.php:153

Director::direct(/admin/pages/edit/EditForm/field/Blocks/add-multi-class/ButtonBlock/ItemEditForm,DataModel)
main.php:177