Summary
Drupal 10 upgraded from Twig 2 to Twig 3 and with this upgrade the syntax for the twig tag spaceless has changed. [See change record](
https://www.drupal.org/node/3256890 →
).
Steps to reproduce
- Ensure patternkit_media_library submodule is enabled
- Attempt to add a Patternkit block outside of Layout Builder by going
admin/structure/block/patternkit
- Click Add Patternkit block
- You should get an error message regarding the unsupported spaceless tag., See example of error below:
The website encountered an unexpected error. Please try again later.
Twig\Error\SyntaxError: Unknown "spaceless" tag. in Twig\Parser->subparse() (line 15 of modules/contrib/patternkit/templates/patternkit-add-list.html.twig).
Twig\Parser->parse(Object) (Line: 491)
Twig\Environment->parse(Object) (Line: 519)
Twig\Environment->compileSource(Object) (Line: 131)
Drupal\Core\Template\TwigEnvironment->compileSource(Object) (Line: 351)
Twig\Environment->loadTemplate('__TwigTemplate_a5cc4d6dee79c25e68d7e8a61b654484', 'modules/contrib/patternkit/templates/patternkit-add-list.html.twig') (Line: 312)
Twig\Environment->load('modules/contrib/patternkit/templates/patternkit-add-list.html.twig') (Line: 53)
twig_render_template('modules/contrib/patternkit/templates/patternkit-add-list.html.twig', Array) (Line: 372)
Drupal\Core\Theme\ThemeManager->render('patternkit_add_list', Array) (Line: 436)
Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 204)
Drupal\Core\Render\Renderer->render(Array, ) (Line: 238)
Drupal\Core\Render\MainContent\HtmlRenderer->Drupal\Core\Render\MainContent\{closure}() (Line: 583)
Drupal\Core\Render\Renderer->executeInRenderContext(Object, Object) (Line: 239)
Drupal\Core\Render\MainContent\HtmlRenderer->prepare(Array, Object, Object) (Line: 128)
Drupal\Core\Render\MainContent\HtmlRenderer->renderResponse(Array, Object, Object) (Line: 90)
Drupal\Core\EventSubscriber\MainContentViewSubscriber->onViewRenderArray(Object, 'kernel.view', Object)
call_user_func(Array, Object, 'kernel.view', Object) (Line: 111)
Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch(Object, 'kernel.view') (Line: 171)
Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object, 1) (Line: 74)
Symfony\Component\HttpKernel\HttpKernel->handle(Object, 1, 1) (Line: 58)
Drupal\Core\StackMiddleware\Session->handle(Object, 1, 1) (Line: 48)
Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object, 1, 1) (Line: 106)
Drupal\page_cache\StackMiddleware\PageCache->pass(Object, 1, 1) (Line: 85)
Drupal\page_cache\StackMiddleware\PageCache->handle(Object, 1, 1) (Line: 48)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object, 1, 1) (Line: 51)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object, 1, 1) (Line: 51)
Drupal\Core\StackMiddleware\StackedHttpKernel->handle(Object, 1, 1) (Line: 704)
Drupal\Core\DrupalKernel->handle(Object) (Line: 19)
Don't see the error message?
If you don't see the error above but instead receive a White Screen Of Death (WSOD), ensure you have enabled Logging and errors
- Go to
admin/config/development/logging
- and select Errors and warnings
- and save your changes
- Clear caches and reload the page or try to reproduce error again
Proposed resolution
Modify modules/contrib/patternkit/templates/patternkit-add-list.html.twig as follows:
- Replace
{% spaceless %} with {% apply spaceless %}
- Replace
{% endspaceless %} with {% endapply %}
- Clear drupal's cache
- Repeat the steps to reproduce error and this time the error should not display and instead you will see a page with a list of links related to adding different type of Patternkit blocks
See Twig's docs for more details on the {% spaceless %} tag: https://twig.symfony.com/doc/3.x/filters/spaceless.html
Remaining tasks
N/A
User interface changes
N/A
API changes
N/A
Data model changes
N/A