Problem/Motivation

When Drupal is set to maintenance mode, the following fatal error occurs:
TypeError: Argument 1 passed to Drupal\Core\Extension\ThemeHandler::addTheme() must be an instance of Drupal\Core\Extension\Extension, null given

Steps to reproduce

Proposed resolution

Remaining tasks

User interface changes

API changes

Data model changes

Release notes snippet

CommentFileSizeAuthor
#8 drupal-maintenance-page-addtheme-error-3218085-6.patch1.13 KBfathima.asmat
#5 drupal-maintenance-page-addtheme-error-3218085-4.patch1.13 KBfathima.asmat
#3 drupal-maintenance-page-addtheme-error-3218085-3.patch1.14 KBfathima.asmat
#2 drupal-maintenance-page-addtheme-error-3218085-2.patch1.16 KBfathima.asmat

Issue fork drupal-3218085

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Comments

fathima.asmat created an issue. See original summary.

fathima.asmat’s picture

fathima.asmat CreditAttribution: fathima.asmat at Soapbox Communications Ltd commented
Assigned: fathima.asmat » Unassigned
Status: Active » Needs review
FileSize
drupal-maintenance-page-addtheme-error-3218085-2.patch1.16 KB

This patch should fix it.

fathima.asmat’s picture

fathima.asmat CreditAttribution: fathima.asmat at Soapbox Communications Ltd commented
FileSize
drupal-maintenance-page-addtheme-error-3218085-3.patch1.14 KB

Status: Needs review » Needs work

The last submitted patch, 3: drupal-maintenance-page-addtheme-error-3218085-3.patch, failed testing. View results

fathima.asmat’s picture

fathima.asmat CreditAttribution: fathima.asmat at Soapbox Communications Ltd commented
FileSize
drupal-maintenance-page-addtheme-error-3218085-4.patch1.13 KB
cilefen’s picture

cilefen CreditAttribution: cilefen as a volunteer commented
Issue tags: -drupal core, -maintenance mode, -Extension system +Needs steps to reproduce, +Bug Smash Initiative

As far as I know this doesn't actually happen normally. How do we reproduce this one?

fathima.asmat’s picture

fathima.asmat CreditAttribution: fathima.asmat at Soapbox Communications Ltd commented
Status: Needs work » Needs review
fathima.asmat’s picture

fathima.asmat CreditAttribution: fathima.asmat at Soapbox Communications Ltd commented
FileSize
drupal-maintenance-page-addtheme-error-3218085-6.patch1.13 KB

Version: 9.1.x-dev » 9.3.x-dev

Drupal 9.1.10 (June 4, 2021) and Drupal 9.2.10 (November 24, 2021) were the last bugfix releases of those minor version series. Drupal 9 bug reports should be targeted for the 9.3.x-dev branch from now on, and new development or disruptive changes should be targeted for the 9.4.x-dev branch. For more information see the Drupal core minor version schedule and the Allowed changes during the Drupal core release cycle.

Kristen Pol’s picture

Kristen Pol
she/her
Primary language English
Location Santa Cruz, CA, USA
CreditAttribution: Kristen Pol at Itty Bitty Byte for Salsa Digital commented
Status: Needs review » Postponed (maintainer needs more info)

@fathima.asmat Would you provide more detailed steps to reproduce along with more information such as the Drupal version and any contributed modules you have installed. I agree with #6 that this is not a typical error so there may be something about your setup that is causing this.

x775’s picture

x775 CreditAttribution: x775 commented

I encountered this obscure problem, too.

The issue arose attempting to upgrade a website from Drupal 8.8 to 9.3. Due to a number of other issues, the website was in maintenance mode when the upgrade was attempted. Subsequent database upgrades and module updates were carried out using drush. Attempting to access the website directly throws the following:

- -  18/May/2022:13:06:04 +0000 "GET /index.php" 500
NOTICE: PHP message: TypeError: Argument 1 passed to Drupal\Core\Extension\ThemeHandler::addTheme() must be an instance of Drupal\Core\Extension\Extension, null given, called in /app/web/core/includes/theme.maintenance.inc on line 93 in /app/web/core/lib/Drupal/Core/Extension/ThemeHandler.php on line 82 #0 /app/web/core/includes/theme.maintenance.inc(93): Drupal\Core\Extension\ThemeHandler->addTheme(NULL)
#1 /app/web/core/includes/bootstrap.inc(505): _drupal_maintenance_theme()
#2 /app/web/core/lib/Drupal/Core/EventSubscriber/MaintenanceModeSubscriber.php(121): drupal_maintenance_theme()
#3 [internal function]: Drupal\Core\EventSubscriber\MaintenanceModeSubscriber->onKernelRequestMaintenance(Object(Symfony\Component\HttpKernel\Event\RequestEvent), 'kernel.request', Object(Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher))
#4 /app/web/core/lib/Drupal/Component/EventDispatcher/ContainerAwareEventDispatcher.php(142): call_user_func(Array, Object(Symfony\Component\HttpKernel\Event\RequestEvent), 'kernel.request', Object(Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher))
#5 /app/vendor/symfony/http-kernel/HttpKernel.php(134): Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch(Object(Symfony\Component\HttpKernel\Event\RequestEvent), 'kernel.request')
#6 /app/vendor/symfony/http-kernel/HttpKernel.php(80): Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object(Symfony\Component\HttpFoundation\Request), 1)
#7 /app/web/core/lib/Drupal/Core/StackMiddleware/Session.php(58): Symfony\Component\HttpKernel\HttpKernel->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true)
#8 /app/web/core/lib/Drupal/Core/StackMiddleware/KernelPreHandle.php(48): Drupal\Core\StackMiddleware\Session->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true)
#9 /app/web/core/modules/page_cache/src/StackMiddleware/PageCache.php(191): Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true)
#10 /app/web/core/modules/page_cache/src/StackMiddleware/PageCache.php(128): Drupal\page_cache\StackMiddleware\PageCache->fetch(Object(Symfony\Component\HttpFoundation\Request), 1, true)
#11 /app/web/core/modules/page_cache/src/StackMiddleware/PageCache.php(82): Drupal\page_cache\StackMiddleware\PageCache->lookup(Object(Symfony\Component\HttpFoundation\Request), 1, true)
#12 /app/web/core/lib/Drupal/Core/StackMiddleware/ReverseProxyMiddleware.php(48): Drupal\page_cache\StackMiddleware\PageCache->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true)
#13 /app/web/core/lib/Drupal/Core/StackMiddleware/NegotiationMiddleware.php(51): Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true)
#14 /app/vendor/stack/builder/src/Stack/StackedHttpKernel.php(23): Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true)
#15 /app/web/core/lib/Drupal/Core/DrupalKernel.php(708): Stack\StackedHttpKernel->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true)
#16 /app/web/index.php(19): Drupal\Core\DrupalKernel->handle(Object(Symfony\Component\HttpFoundation\Request))
#17 {main}

However, by forcing the website to leave maintenance mode by executing

drush sset system.maintenance_mode 0

I get another error, indicating that the base theme of customised theme is missing. In any event, applying the patch allows me to skip directly to the error concerning the customised theme.

cilefen’s picture

cilefen CreditAttribution: cilefen as a volunteer commented

What is the value of $settings['maintenance_theme'] in settings.php?

This error indicates there is a maintenance theme set with an undefined ancestor (base) theme.

Version: 9.3.x-dev » 9.4.x-dev

Drupal 9.3.15 was released on June 1st, 2022 and is the final full bugfix release for the Drupal 9.3.x series. Drupal 9.3.x will not receive any further development aside from security fixes. Drupal 9 bug reports should be targeted for the 9.4.x-dev branch from now on, and new development or disruptive changes should be targeted for the 9.5.x-dev branch. For more information see the Drupal core minor version schedule and the Allowed changes during the Drupal core release cycle.

dmezquia’s picture

dmezquia
Primary language Spanish
Location Spain
CreditAttribution: dmezquia as a volunteer and at La Drupalera by Emergya for emerya commented

I have the same error, but patch #8 doesn't work for me. Drupal 9.4.8.

Version: 9.4.x-dev » 9.5.x-dev

Drupal 9.4.9 was released on December 7, 2022 and is the final full bugfix release for the Drupal 9.4.x series. Drupal 9.4.x will not receive any further development aside from security fixes. Drupal 9 bug reports should be targeted for the 9.5.x-dev branch from now on, and new development or disruptive changes should be targeted for the 10.1.x-dev branch. For more information see the Drupal core minor version schedule and the Allowed changes during the Drupal core release cycle.

nofue’s picture

nofue CreditAttribution: nofue as a volunteer commented

@cilefen is right with #12: watch that setting before patching stuff.

Version: 9.5.x-dev » 11.x-dev

Drupal core is moving towards using a “main” branch. As an interim step, a new 11.x branch has been opened, as Drupal.org infrastructure cannot currently fully support a branch named main. New developments and disruptive changes should now be targeted for the 11.x branch. For more information, see the Drupal core minor version schedule and the Allowed changes during the Drupal core release cycle.