Uploading a file on my dev wiki not logged in...
Why must files belong to users? What's wrong with Anons?
```
[581c4356] /wiki/Special:Upload UploadStashNotLoggedInException from line 272 of /var/www/wiki/mediawiki/core/includes/upload/UploadStash.php: UploadStash::stashFile No user is logged in, files must belong to users
Backtrace:
#0 /var/www/wiki/mediawiki/core/includes/upload/UploadBase.php(922): UploadStash->stashFile(string, string)
#1 /var/www/wiki/mediawiki/core/includes/upload/UploadBase.php(935): UploadBase->stashFile()
#2 /var/www/wiki/mediawiki/core/includes/upload/UploadBase.php(944): UploadBase->stashFileGetKey()
#3 /var/www/wiki/mediawiki/core/includes/specials/SpecialUpload.php(359): UploadBase->stashSession()
#4 /var/www/wiki/mediawiki/core/includes/specials/SpecialUpload.php(473): SpecialUpload->showUploadWarning(array)
#5 /var/www/wiki/mediawiki/core/includes/specials/SpecialUpload.php(197): SpecialUpload->processUpload()
#6 /var/www/wiki/mediawiki/core/includes/specialpage/SpecialPage.php(384): SpecialUpload->execute(NULL)
#7 /var/www/wiki/mediawiki/core/includes/specialpage/SpecialPageFactory.php(553): SpecialPage->run(NULL)
#8 /var/www/wiki/mediawiki/core/includes/MediaWiki.php(248): SpecialPageFactory::executePath(Title, RequestContext)
#9 /var/www/wiki/mediawiki/core/includes/MediaWiki.php(668): MediaWiki->performRequest()
#10 /var/www/wiki/mediawiki/core/includes/MediaWiki.php(474): MediaWiki->main()
#11 /var/www/wiki/mediawiki/core/index.php(41): MediaWiki->run()
#12 {main}
```