symfony/symfony — pull request #9397 by francoispluchino (2013-10-28 16:51:09+00:00)
Title: Fix nonexistent key id in twig of data collector

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

When you create a single button form type, the id of data collector does not exist. It's caused by the PR #9394.