FlattenException class not found.

[filipgorny]

I have some weird issue with FlattenException. I tried to fix it myself but after few hours of thinking what can be wrong I didn't come to anything.

What I found out is that the FlattenException create method is called, with ClassNotFound exception as the first argument, with message that the FlattenException class is not found.

It sounds like a non-sense.

Actually I know what is wrong in my business logic code. I have a class that has incompatible method declaration with the parent class. I know it because I printed the exception stack in ExceptionHandler::createResponse. Then there is FlattenException::create method called which causes ClassNotFoundException, even it actually go into the create method.

The error message is

ClassNotFoundException: Attempted to load class "FlattenException" from namespace "Symfony\Component\Debug\Exception" in /var/www/grocery/src/Potato/LocationBundle/Adapter/LocationEntity.php line 0. Do you need to "use" it from another namespace? Perhaps you need to add a use statement for one of the following: Symfony\Component\HttpKernel\Exception\FlattenException, Symfony\Component\Debug\Exception\FlattenException.

LocationEntity.php on line 0?

It is not a true of course.

When I comment out the FlattenException::create line, then Symfony doesn't print anything.

I tried to find the reason and fix it myself but I gave up. It may be even a PHP bug.

[jakzal]

Would you mind to reproduce your issue on a fork of Standard Edition? Would help us to debug.

[fabpot]

Closing as there is no feedback.

[radekz2]

Just run into this same exception after adding a form to my controller:

ClassNotFoundException: Attempted to load class "FlattenException" from namespace "Symfony\Component\Debug\Exception" in /vagrant/src/Rgrs/ContestBundle/Controller/DefaultController.php line 28. Do you need to "use" it from another namespace? Perhaps you need to add a use statement for one of the following: Symfony\Component\Debug\Exception\FlattenException, Symfony\Component\HttpKernel\Exception\FlattenException.

Here's the controller:

<?php

namespace Rgrs\ContestBundle\Controller;

use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\Method;

/**
 *  @Route("/")
 */
class DefaultController extends BaseController
{
    /**
    * @Route("", name="homepage_action")
    * @Method({"GET"})
    */
    public function indexAction(Request $request)
    {
        $entity = new \Rgrs\ContestBundle\Entity\ContestEntryGCaptcha();
        $contestForm = $this->createForm(new \Rgrs\ContestBundle\Form\ContestEntryGCaptchaForm(), $entity);
        $contestForm->handleRequest($request);

        return $this->render('RgrsContestBundle:Default:index.html.twig', array("form" => $contestForm->createView()));
    }
}

Symfony version 2.4.4

Update:

Not extending BaseController (my code) by switching to Controller fixed it.

[jakzal]

@radekz2 would you mind forking Symfony Standard Edition and recreating this issue on a branch? Controller alone is not enough to reproduce.

[radekz2]

Not a problem, will update this as soon as I have some results, may take me couple of days.

[nicolas-grekas]

Which version of the debug component do you have? I suspect you're hit by https://bugs.php.net/42098 Version 2.5 should have a proper workaround, tell me if it works with you.

[radekz2]

How do I get that version number?

[stof]

composer show -i will show you the versions of all packages installed through composer

[radekz2]

Here's what I see

doctrine/annotations                 v1.1.2             Docblock Annotations Parser
doctrine/cache                       v1.3.0             Caching library offering an object-oriented API for many cache backends
doctrine/collections                 v1.2               Collections Abstraction library
doctrine/common                      v2.4.1             Common Library for Doctrine projects
doctrine/dbal                        v2.4.2             Database Abstraction Layer
doctrine/doctrine-bundle             v1.2.0             Symfony DoctrineBundle
doctrine/inflector                   v1.0               Common String Manipulations with regard to casing and singular/plural rules.
doctrine/lexer                       v1.0               Base library for a lexer that can be used in Top-Down, Recursive Descent Parsers.
doctrine/orm                         v2.4.2             Object-Relational-Mapper for PHP
excelwebzone/recaptcha-bundle        dev-master d08f803 This bundle provides easy reCAPTCHA form field integration
gregwar/captcha                      v1.0.11            Captcha generator
gregwar/captcha-bundle               dev-master 7c38520 Captcha bundle
incenteev/composer-parameter-handler v2.1.0             Composer script handling your ignored parameter file
jdorn/sql-formatter                  v1.2.17            a PHP SQL highlighting library
kriswallsmith/assetic                v1.1.2             Asset Management for PHP
monolog/monolog                      1.9.1              Sends your logs to files, sockets, inboxes, databases and various web services
psr/log                              1.0.0              Common interface for logging libraries
sensio/distribution-bundle           v2.3.4             The base bundle for the Symfony Distributions
sensio/framework-extra-bundle        v3.0.0             This bundle provides a way to configure your controllers with annotations
sensio/generator-bundle              v2.3.4             This bundle generates code for you
swiftmailer/swiftmailer              v5.1.0             Swiftmailer, free feature-rich PHP mailer
symfony/assetic-bundle               v2.3.0             Integrates Assetic into Symfony2
symfony/icu                          v1.2.1             Contains an excerpt of the ICU data and classes to load it.
symfony/monolog-bundle               v2.5.1             Symfony MonologBundle
symfony/swiftmailer-bundle           v2.3.7             Symfony SwiftmailerBundle
symfony/symfony                      v2.4.4             The Symfony PHP framework
twig/extensions                      v1.0.1             Common additional features for Twig that do not directly belong in core
twig/twig                            v1.15.1            Twig, the flexible, fast, and secure template language for PHP

[stof]

symfony/symfony v2.4.4 means you have the 2.4.4 version of the Debug component (which is a subpart of the fullstack framework). @nicolas-grekas opened a PR to fix the issue in 2.3 (which will be applied to 2.4 after the merge) in https://github.com/symfony/symfony/pull/10817

[radekz2]

Ok great thanks!

[nicolas-grekas]

@radekz2 can you please confirm that the proposed patch fixes the issue? The easiest way to do that might be to replace your vendor/symfony/symfony/src/Symfony/Component/Debug/ErrorHandler.php file with https://raw.githubusercontent.com/nicolas-grekas/symfony/b147cfaf15492660d6d878d6815512943446401b/src/Symfony/Component/Debug/ErrorHandler.php

[radekz2]

I've copied the file and got a proper exception that helped me fix the actual code issue.

Applying this patch fixes the issue.

Thank you!