⚓ T413926 Using null as an array offset

mediawiki/core locally running PHP 8.5
composer phpunit:entrypoint -- --filter ApiUploadTest

1) MediaWiki\Tests\Api\ApiUploadTest::testUploadErrorFiletypeMissing
Using null as an array offset is deprecated, use an empty string instead

/[...]/mediawiki/core/includes/Media/MediaHandlerFactory.php:68
/[...]/mediawiki/core/includes/Media/MediaHandlerFactory.php:80
/[...]/mediawiki/core/includes/Media/MediaHandler.php:52
/[...]/mediawiki/core/includes/Utils/MWFileProps.php:75
/[...]/mediawiki/core/includes/Upload/UploadBase.php:523
/[...]/mediawiki/core/includes/Upload/UploadBase.php:543
/[...]/mediawiki/core/includes/Upload/UploadBase.php:484
/[...]/mediawiki/core/includes/Upload/UploadBase.php:410
/[...]/mediawiki/core/includes/Upload/UploadFromFile.php:95
/[...]/mediawiki/core/includes/Api/ApiUpload.php:864
/[...]/mediawiki/core/includes/Api/ApiUpload.php:159
/[...]/mediawiki/core/includes/Api/ApiMain.php:2061
/[...]/mediawiki/core/includes/Api/ApiMain.php:933
/[...]/mediawiki/core/tests/phpunit/includes/Api/ApiTestCase.php:186
/[...]/mediawiki/core/tests/phpunit/includes/Api/ApiTestCase.php:240
/[...]/mediawiki/core/tests/phpunit/includes/Api/ApiUploadTest.php:139

(note: not yet seen in WMF experimental CI due to the order in which it runs MediaWiki's PHPUnit tests, but it presumably would be seen there at some point)

⚓ T413926 Using null as an array offset is deprecated, use an empty string instead (from Media/MediaHandlerFactory.php:68)