"Array to string conversion in Drupal" in Forum

Same error with 8.0.3 ...

... and same with 8.0.5 :-(

We have the same issue or a variation thereof:

Notice: Array to string conversion in Drupal\Component\Render\HtmlEscapedText->__construct() (line 37 of core/lib/Drupal/Component/Render/HtmlEscapedText.php).

Drupal\Component\Render\HtmlEscapedText->__construct(Array) (Line: 209)
Drupal\Core\Utility\Token->replace('[current-page:title] | [site:name]', Array, Array) (Line: 45)
Drupal\metatag\MetatagToken->replace('[current-page:title] | [site:name]', Array, Array) (Line: 305)
Drupal\metatag\MetatagManager->generateElements(Array, NULL) (Line: 217)
metatag_get_tags_from_route() (Line: 67)
metatag_page_attachments(Array) (Line: 302)
Drupal\Core\Render\MainContent\HtmlRenderer->invokePageAttachmentHooks(Array) (Line: 278)
Drupal\Core\Render\MainContent\HtmlRenderer->prepare(Array, Object, Object) (Line: 122)
Drupal\Core\Render\MainContent\HtmlRenderer->renderResponse(Array, Object, Object) (Line: 95)
Drupal\Core\EventSubscriber\MainContentViewSubscriber->onViewRenderArray(Object, 'kernel.view', Object) (Line: 116)
Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch('kernel.view', Object) (Line: 144)
Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object, 1) (Line: 62)
Symfony\Component\HttpKernel\HttpKernel->handle(Object, 1, 1) (Line: 62)
Drupal\Core\StackMiddleware\Session->handle(Object, 1, 1) (Line: 53)
Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object, 1, 1) (Line: 103)
Drupal\page_cache\StackMiddleware\PageCache->pass(Object, 1, 1) (Line: 82)
Drupal\page_cache\StackMiddleware\PageCache->handle(Object, 1, 1) (Line: 55)
Drupal\ban\BanMiddleware->handle(Object, 1, 1) (Line: 51)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object, 1, 1) (Line: 55)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object, 1, 1) (Line: 23)
Stack\StackedHttpKernel->handle(Object, 1, 1) (Line: 631)
Drupal\Core\DrupalKernel->handle(Object) (Line: 19)

The error appears when an Anonymous User or an Authenticated User accesses forum posts. The error does not appear when the Admin accesses the same forum posts.
The Drupal version is 8.1.x-dev

Updated the title, as the problem is not restricted to a D8.0.4 upgrade

Сообщение об ошибке
Notice: Array to string conversion in Drupal\Component\Render\HtmlEscapedText->__construct() (line 37 of core/lib/Drupal/Component/Render/HtmlEscapedText.php).

drupal 8.0.5
i have this error, after updating the Token module to the last version.

FIxed this issue by adding below code snippet :

     if (!is_object($value) && isset($value['#markup'])) {
          $value = $value['#markup'];
      }

at line 204 in core/lib/Drupal/Core/Utility/Token.php

Works for me on D8.2.x-dev :-)

Thank you @Ashutosh.tripathi

What you posted is a core patch, not token module.

However, that is just a workaround. Some token returns a render array instead of a string, that is not valid.

I'm guessing that forum returns a render array, which might work when printed in twig but not in a token. We need to do that conversion where the current-page:title token is generated.

The bug appears on user pages too if the current-page:title token is used. So, this seems to be a more generic token (i mean current-page:title) related error.

Posted a patch in #2714257: [current-page:title] not working properly on pages with a render array as title

Thanks.