symfony/symfony — pull request #2617 by igorw (2011-11-11 11:11:06+00:00)
Title: [TwigBundle] Do not clean output buffering below initial level

This resulted in issues with PHPUnit 3.6, which will buffer all output and clean them in the end. Since
we cleaned their buffer, the subsequent clean would raise a warning. This is documented in [issue 390](https://github.com/sebastianbergmann/phpunit/issues/390) of
the PHPUnit tracker.

Closes #2531.

This also affects FOSRestBundle's ExceptionController /cc @lsmith.