Warning: Undefined array key 1 in Drupal\Core\Asset\AssetResolver of core\lib\Drupal\Core\Asset\AssetResolver.php

The patch resolved the issue. I don't see any warning for this.

We need those steps to reproduce.

Hi Cilefen,

This happened for me on Drupal 9.5.10 version and I am using PHP 8.1 and Database Version 10.4.25-MariaDB. My site was running with 9.5.9 and I started getting this warning after upgrading to 9.5.10 (Upgraded through composer).

Leaving steps to reproduce as the actual steps are not provided.

Also issue summary is incomplete.

No test case either.

The cause of this is an incorrectly formatted library name, likely in YOURTHEME.libraries.yml. Look for a library that does not follow this format: "MODULE_NAME/LIBRARY_NAME" (the forward slash is crucial). If you are able to step debug you could also add a breakpoint within \Drupal\Core\Asset\LibraryDependencyResolver::doGetDependencies (currently line 67). Refresh the page that triggers the error and continue debugging until you find that $library does not follow the correct format. Search your codebase for the incorrect format and replace it if it is in a custom module or theme. If it is in a contrib module, open an issue there.

Perhaps the goal of this ticket could be to have core throw a useful error message when this happens?

Can someone help me know how to make this patch application persist?
I added these lines under /patches in composer.json, but the changes keep getting overwritten as I make changes in composer and update:

 "drupal/core": {
                "3329660 - Assetresolver":
                    "https://www.drupal.org/files/issues/2022-12-26/3329660-2.patch"
            },

In our case, this happens when the library does not exist on Drupal because was removed.

Example of our case:

A search Ajax callback with a library that was removed:
https://example.com/search?ajax_page_state[theme]=radix&ajax_page_state[theme_token]=&ajax_page_state[libraries]=addtoany/addtoany.front&f[0]=type:article
When the library does not exist or is not a valid name, then it gives a warning.
Should be it fixed? Maybe not or maybe it should log which library is not available to leave to the admin decide what to do.

Also covered the core/lib/Drupal/Core/Asset/LibraryDependencyResolver.php class, and continue if the extension or the name are not defined.

Added also array filter on HtmlResponseAttachmentsProcessor to avoid setting already loaded libraries when the array is empty.

[0 = ""]

#10 MR7016 reroll for D10.3.

I have a similar warning with drupal 11.0.9 for every page visited. It must have appeared after one of the latest core updates.
The site with drupal 10.3.10 has the same pages and settings, but there is no warning.
I don't know how to fix it.

Thank you

Warning: Undefined array key 1 in Drupal\Core\Asset\AssetResolver->getJsAssets() (line 243 of /home/hmcpdbiy/prova.gmpe.it/core/lib/Drupal/Core/Asset/AssetResolver.php)

#0 /home/hmcpdbiy/prova.gmpe.it/core/includes/bootstrap.inc(108): _drupal_error_handler_real(2, 'Undefined array...', '/home/hmcpdbiy/...', 243)
#1 /home/hmcpdbiy/prova.gmpe.it/core/lib/Drupal/Core/Asset/AssetResolver.php(243): _drupal_error_handler(2, 'Undefined array...', '/home/hmcpdbiy/...', 243)
#2 /home/hmcpdbiy/prova.gmpe.it/core/lib/Drupal/Core/Render/HtmlResponseAttachmentsProcessor.php(286): Drupal\Core\Asset\AssetResolver->getJsAssets(Object(Drupal\Core\Asset\AttachedAssets), true, Object(Drupal\Core\Language\Language))
#3 /home/hmcpdbiy/prova.gmpe.it/core/lib/Drupal/Core/Render/HtmlResponseAttachmentsProcessor.php(123): Drupal\Core\Render\HtmlResponseAttachmentsProcessor->processAssetLibraries(Object(Drupal\Core\Asset\AttachedAssets), Array)
#4 /home/hmcpdbiy/prova.gmpe.it/core/modules/big_pipe/src/Render/BigPipeResponseAttachmentsProcessor.php(97): Drupal\Core\Render\HtmlResponseAttachmentsProcessor->processAttachments(Object(Drupal\Core\Render\HtmlResponse))
#5 /home/hmcpdbiy/prova.gmpe.it/core/lib/Drupal/Core/EventSubscriber/HtmlResponseSubscriber.php(45): Drupal\big_pipe\Render\BigPipeResponseAttachmentsProcessor->processAttachments(Object(Drupal\Core\Render\HtmlResponse))
#6 /home/hmcpdbiy/prova.gmpe.it/vendor/symfony/event-dispatcher/EventDispatcher.php(246): Drupal\Core\EventSubscriber\HtmlResponseSubscriber->onRespond(Object(Symfony\Component\HttpKernel\Event\ResponseEvent), 'kernel.response', Object(Symfony\Component\EventDispatcher\EventDispatcher))
#7 /home/hmcpdbiy/prova.gmpe.it/vendor/symfony/event-dispatcher/EventDispatcher.php(206): Symfony\Component\EventDispatcher\EventDispatcher::Symfony\Component\EventDispatcher\{closure}(Object(Symfony\Component\HttpKernel\Event\ResponseEvent), 'kernel.response', Object(Symfony\Component\EventDispatcher\EventDispatcher))
#8 /home/hmcpdbiy/prova.gmpe.it/vendor/symfony/event-dispatcher/EventDispatcher.php(56): Symfony\Component\EventDispatcher\EventDispatcher->callListeners(Array, 'kernel.response', Object(Symfony\Component\HttpKernel\Event\ResponseEvent))
#9 /home/hmcpdbiy/prova.gmpe.it/vendor/symfony/http-kernel/HttpKernel.php(216): Symfony\Component\EventDispatcher\EventDispatcher->dispatch(Object(Symfony\Component\HttpKernel\Event\ResponseEvent), 'kernel.response')
#10 /home/hmcpdbiy/prova.gmpe.it/vendor/symfony/http-kernel/HttpKernel.php(204): Symfony\Component\HttpKernel\HttpKernel->filterResponse(Object(Drupal\Core\Render\HtmlResponse), Object(Symfony\Component\HttpFoundation\Request), 1)
#11 /home/hmcpdbiy/prova.gmpe.it/vendor/symfony/http-kernel/HttpKernel.php(76): Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object(Symfony\Component\HttpFoundation\Request), 1)
#12 /home/hmcpdbiy/prova.gmpe.it/core/lib/Drupal/Core/StackMiddleware/Session.php(53): Symfony\Component\HttpKernel\HttpKernel->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true)
#13 /home/hmcpdbiy/prova.gmpe.it/core/lib/Drupal/Core/StackMiddleware/KernelPreHandle.php(48): Drupal\Core\StackMiddleware\Session->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true)
#14 /home/hmcpdbiy/prova.gmpe.it/core/lib/Drupal/Core/StackMiddleware/ContentLength.php(28): Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true)
#15 /home/hmcpdbiy/prova.gmpe.it/core/modules/big_pipe/src/StackMiddleware/ContentLength.php(32): Drupal\Core\StackMiddleware\ContentLength->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true)
#16 /home/hmcpdbiy/prova.gmpe.it/core/modules/page_cache/src/StackMiddleware/PageCache.php(106): Drupal\big_pipe\StackMiddleware\ContentLength->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true)
#17 /home/hmcpdbiy/prova.gmpe.it/core/modules/page_cache/src/StackMiddleware/PageCache.php(85): Drupal\page_cache\StackMiddleware\PageCache->pass(Object(Symfony\Component\HttpFoundation\Request), 1, true)
#18 /home/hmcpdbiy/prova.gmpe.it/core/lib/Drupal/Core/StackMiddleware/ReverseProxyMiddleware.php(48): Drupal\page_cache\StackMiddleware\PageCache->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true)
#19 /home/hmcpdbiy/prova.gmpe.it/core/lib/Drupal/Core/StackMiddleware/NegotiationMiddleware.php(51): Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true)
#20 /home/hmcpdbiy/prova.gmpe.it/core/lib/Drupal/Core/StackMiddleware/AjaxPageState.php(36): Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true)
#21 /home/hmcpdbiy/prova.gmpe.it/core/lib/Drupal/Core/StackMiddleware/StackedHttpKernel.php(51): Drupal\Core\StackMiddleware\AjaxPageState->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true)
#22 /home/hmcpdbiy/prova.gmpe.it/core/lib/Drupal/Core/DrupalKernel.php(709): Drupal\Core\StackMiddleware\StackedHttpKernel->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true)
#23 /home/hmcpdbiy/prova.gmpe.it/index.php(19): Drupal\Core\DrupalKernel->handle(Object(Symfony\Component\HttpFoundation\Request))
#24 {main}

There's an MR here that needs work, changing status.

#13 reroll for D10.4