DoctrineBundle: Fatal error: Call to protected DoctrineORMEntityManager_00000000269a7ffd000000007f98586228a0c7188fe871033e49ce7a85e414ea::__construct() from context 'appDevDebugProjectContainer'

I’ve recently updated Symfony from 2.7 to 2.8, in the process of upgrading to 3.0 next

I have stripped down composer.json and re-built from scratch. This is the output of composer show -i for the doctrine and symfony packages:

doctrine/cache                       v1.7.0                                              Caching library offering an object-oriented API for many cache backends
doctrine/collections                 v1.5.0                                              Collections Abstraction library
doctrine/common                      v2.8.0                                              Common Library for Doctrine projects
doctrine/data-fixtures               v1.3.1                                              Data Fixtures for all Doctrine Object Managers
doctrine/dbal                        v2.6.0                                              Database Abstraction Layer
doctrine/doctrine-bundle             1.9.1                                               Symfony DoctrineBundle
doctrine/doctrine-cache-bundle       1.3.3                                               Symfony Bundle for Doctrine Cache
doctrine/doctrine-fixtures-bundle    v2.4.1                                              Symfony DoctrineFixturesBundle
doctrine/doctrine-migrations-bundle  v1.3.1                                              Symfony DoctrineMigrationsBundle
doctrine/inflector                   v1.2.0                                              Common String Manipulations with regard to casing and singular/plural rules.
doctrine/instantiator                1.1.0                                               A small, lightweight utility to instantiate objects in PHP without invoking their constructors
doctrine/lexer                       v1.0.1                                              Base library for a lexer that can be used in Top-Down, Recursive Descent Parsers.
doctrine/migrations                  v1.5.0                                              Database Schema migrations using Doctrine DBAL
doctrine/orm                         v2.6.1                                              Object-Relational-Mapper for PHP
friendsofsymfony/oauth-server-bundle 1.6.1                                               Symfony2 OAuth Server Bundle
friendsofsymfony/oauth2-php          1.2.2                                               OAuth2 library
friendsofsymfony/rest-bundle         2.3.1                                               This Bundle provides various tools to rapidly develop RESTful API's with Symfony
friendsofsymfony/user-bundle         v2.1.2                                              Symfony FOSUserBundle
ensio/distribution-bundle           v5.0.22                                             Base bundle for Symfony Distributions
sensio/framework-extra-bundle        v3.0.29                                             This bundle provides a way to configure your controllers with annotations
sensio/generator-bundle              v3.1.7                                              This bundle generates code for you
sensiolabs/security-checker          v4.1.8                                              A security checker for your composer.lock
symfony/assetic-bundle               v2.8.2                                              Integrates Assetic into Symfony2
symfony/console                      v3.0.0                                              Symfony Console Component
symfony/monolog-bundle               v3.3.0                                              Symfony MonologBundle
symfony/polyfill-intl-icu            v1.8.0                                              Symfony polyfill for intl's ICU-related data and classes
symfony/polyfill-mbstring            v1.8.0                                              Symfony polyfill for the Mbstring extension
symfony/polyfill-php54               v1.8.0                                              Symfony polyfill backporting some PHP 5.4+ features to lower PHP versions
symfony/polyfill-php55               v1.8.0                                              Symfony polyfill backporting some PHP 5.5+ features to lower PHP versions
symfony/polyfill-php56               v1.8.0                                              Symfony polyfill backporting some PHP 5.6+ features to lower PHP versions
symfony/polyfill-php70               v1.8.0                                              Symfony polyfill backporting some PHP 7.0+ features to lower PHP versions
symfony/polyfill-util                v1.8.0                                              Symfony utilities for portability of PHP codes
symfony/security-acl                 v2.8.0                                              Symfony Security Component - ACL (Access Control List)
symfony/swiftmailer-bundle           v3.2.2                                              Symfony SwiftmailerBundle
symfony/symfony                      v2.8.0                                              The Symfony PHP framework```