symfony/symfony — pull request #9923 by florianv (2014-01-01 08:57:56+00:00)
Title: [DoctrineBridge] Fixed an issue with DoctrineParserCache

| Q | A
| ------------- | ---
| Bug fix? | yes
| New feature? | no
| BC breaks? | no
| Deprecations? | no
| Tests pass? | yes
| Fixed tickets |
| License | MIT
| Doc PR |

The `DoctrineParserCache` returns `false` when there is no entry (https://github.com/doctrine/cache/blob/master/lib/Doctrine/Common/Cache/Cache.php#L52).
But the `ExpressionLanguage` class expects `null` to be returned by the `ParserCacheInterface`, which causes the expressions to not be parsed when using a `DoctrineParserCache`.