Lack of support for EnforcedResponseException breaks form component submission

Demo video about the bug attached

Layout Builder rethrows this exception in Drupal\layout_builder\Plugin\Block\FieldBlock to allow for this flow to work.

Indeed, but it points to a core issue too:

    // @todo Remove in https://www.drupal.org/project/drupal/issues/2367555.
    catch (EnforcedResponseException $e) {
      throw $e;
    }

😭

#3 was introduced in #2995893: Layout builder chokes on form exceptions that are part of natural form processing → .

it submits fine but on submission, XB catches the EnforcedResponseException and that leads to failed rendering of the component:

This sounds related to 📌 ComponentSourceInterface::submitConfigurationForm and validateConfigurationForm are never called Active , but it's possible that just adding the catch when building block plugins is sufficient? 🤔

Can you give this a try?

 .../ExperienceBuilder/ComponentSource/BlockComponent.php       | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/src/Plugin/ExperienceBuilder/ComponentSource/BlockComponent.php b/src/Plugin/ExperienceBuilder/ComponentSource/BlockComponent.php
index f0a7b094c..6921a97e2 100644
--- a/src/Plugin/ExperienceBuilder/ComponentSource/BlockComponent.php
+++ b/src/Plugin/ExperienceBuilder/ComponentSource/BlockComponent.php
@@ -16,6 +16,7 @@ use Drupal\Core\Cache\CacheableMetadata;
 use Drupal\Core\Config\TypedConfigManagerInterface;
 use Drupal\Core\Entity\EntityInterface;
 use Drupal\Core\Entity\FieldableEntityInterface;
+use Drupal\Core\Form\EnforcedResponseException;
 use Drupal\Core\Form\FormStateInterface;
 use Drupal\Core\Link;
 use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
@@ -212,7 +213,14 @@ final class BlockComponent extends ComponentSourceBase implements ContainerFacto
       return $build;
     }
 
-    $build['content'] = $block->build();
+    try {
+      $build['content'] = $block->build();
+    }
+    // @todo Remove in https://www.drupal.org/project/drupal/issues/2367555.
+    catch (EnforcedResponseException $e) {
+      throw $e;
+    }
+
     if (Element::isEmpty($build['content'])) {
       return $build;
     }

I tried that, thanks, but that did not seem to change anything.

From what I see src/Element/RenderSafeComponentContainer.php is where the logging comes from which catches all throwables:

  public function renderComponent(array $element): array {
    $context = new RenderContext();
    $element['#children'] = $this->renderer->executeInRenderContext($context, function () use (&$element, $context) {
      try {
        return $this->renderer->render($element['#component']);
      }
      catch (\Throwable $e) {

So I think re-throwing it will still make it end up here and caught wholesale.