This morning I have upgraded one of my projects from 3.2.8 to 3.3.0. Everything is working fine except that the web toolbar is not loading. There is a strange error logged which is causing it. In the logs it is:

[2017-05-30 07:51:42] php.CRITICAL: Uncaught Notice: Undefined offset: 1 {"exception":"[object] (Symfony\\Component\\Debug\\Exception\\ContextErrorException(code: 0): Notice: Undefined offset: 1 at /Users/SvetlinStaev/Projects/test/vendor/symfony/symfony/src/Symfony/Component/HttpKernel/DataCollector/LoggerDataCollector.php:142)"} []

When I comment this $log[1], it works fine and no errors are logged.

$logs[$log[0]][] = array('message' => ''); //$log[1]);

I tried to change the permissions of my cache and log folders, cleared the cache, warmed up, enabled and disabled the toolbar but without commenting $log[1] it fails.

On a fresh Symfony 3.3.0 project it works fine. Would it be possible to have a check for the count of the $log variable before this line?