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bug #23050 [Form][Profiler] Fixes form collector triggering deprecati…
…ons (ogizanagi) This PR was merged into the 3.3 branch. Discussion ---------- [Form][Profiler] Fixes form collector triggering deprecations | Q | A | ------------- | --- | Branch? | 3.3 <!-- see comment below --> | Bug fix? | yes | New feature? | no <!-- don't forget updating src/**/CHANGELOG.md files --> | BC breaks? | no | Deprecations? | no <!-- don't forget updating UPGRADE-*.md files --> | Tests pass? | yes | Fixed tickets | N/A <!-- #-prefixed issue number(s), if any --> | License | MIT | Doc PR | N/A Since 3.3, if you inspect your logs when accessing the form profiler panel, you'll see some of these: ```sh php.INFO: User Deprecated: The Symfony\Bundle\WebProfilerBundle\Twig\WebProfilerExtension::dumpValue() method is deprecated since version 3.2 and will be removed in 4.0. [...] at /src/Symfony/Bundle/WebProfilerBundle/Twig/WebProfilerExtension.php:119 ``` The [WebProfilerExtension](https://github.com/symfony/symfony/blob/master/src/Symfony/Bundle/WebProfilerBundle/Twig/WebProfilerExtension.php#L73) is still using a `ValueExporter` instance for BC reasons when the $value ins't an instance of `Data` and this BC layer will be removed in 4.0 (so it'll throw an exception/error when trying to use it with something else than a `Data` instance). The issue is since #21638, collectors (including forms one) have been drastically simplified to leverage the "seamless usage of Data clones", which is great!... But there is a slightly different implementation between `Data::seek()` and [`Data::__get()`](https://github.com/symfony/symfony/blob/master/src/Symfony/Component/VarDumper/Cloner/Data.php#L123-L130). There are probably good reasons for this, but it prevents from using classic Twig property access when the underlying data may be a scalar (`null`, `false`, ...). I already spot that while working on the [Validator panel](https://github.com/symfony/symfony/pull/22554/files#diff-deac3c5ce4aa87243093dcd6a3f77a56R84). Perhaps there is a better solution, though. Anyway, current `master` is currently broken, as it still tries to use the `ValueExporter`, which is already removed. And removing the BC layer in `WebProfilerExtension` isn't enough for now. It needs this fix. BTW it also fixes rendering of the concerned inlined-dumps: |Before|After| |--|--| |<img width="818" alt="screenshot 2017-06-03 a 13 35 25" src="https://cloud.githubusercontent.com/assets/2211145/26753222/01a692e6-4862-11e7-90d5-9cc9e4832648.PNG">|<img width="817" alt="screenshot 2017-06-03 a 13 35 47" src="https://cloud.githubusercontent.com/assets/2211145/26753224/090d5d6c-4862-11e7-87c1-73d5346f602c.PNG">| Commits ------- 9de898d [Form][Profiler] Fixes form collector triggering deprecations
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