Merge branch '5.1' into 5.2

* 5.1:
  [Filesystem] fix cleaning up tmp files when dumpFile() fails
  [MimeType] Add missing alias for @mime_type

diff --cc src/Symfony/Bundle/FrameworkBundle/Resources/config/mime_type.php
index 0d874a0,0000000..a7e9bbd
mode 100644,000000..100644
--- 1/src/Symfony/Bundle/FrameworkBundle/Resources/config/mime_type.php
--- /dev/null
+++ b/src/Symfony/Bundle/FrameworkBundle/Resources/config/mime_type.php
@@@ -1,21 -1,0 +1,26 @@@
 +<?php
 +
 +/*
 + * This file is part of the Symfony package.
 + *
 + * (c) Fabien Potencier <fabien@symfony.com>
 + *
 + * For the full copyright and license information, please view the LICENSE
 + * file that was distributed with this source code.
 + */
 +
 +namespace Symfony\Component\DependencyInjection\Loader\Configurator;
 +
++use Symfony\Component\Mime\MimeTypeGuesserInterface;
 +use Symfony\Component\Mime\MimeTypes;
++use Symfony\Component\Mime\MimeTypesInterface;
 +
 +return static function (ContainerConfigurator $container) {
 +    $container->services()
 +        ->set('mime_types', MimeTypes::class)
 +            ->call('setDefault', [service('mime_types')])
++
++        ->alias(MimeTypesInterface::class, 'mime_types')
++        ->alias(MimeTypeGuesserInterface::class, 'mime_types')
 +    ;
 +};