```
2018-03-15 23:32:52 [WqsCpApAAD0AAI4@S7sAAABD] mw1266 kowikisource 1.31.0-wmf.25 exception ERROR: [WqsCpApAAD0AAI4@S7sAAABD] /wiki/%EC%82%AC%EC%9A%A9%EC%9E%90:212.112.242.159 InvalidArgumentException from line 686 of /srv/mediawiki/php-1.31.0-wmf.25/includes/user/User.php: Cannot create a user with no name, no ID, and no actor ID {"exception_id":"WqsCpApAAD0AAI4@S7sAAABD","exception_url":"/wiki/%EC%82%AC%EC%9A%A9%EC%9E%90:212.112.242.159","caught_by":"mwe_handler"}
[Exception InvalidArgumentException] (/srv/mediawiki/php-1.31.0-wmf.25/includes/user/User.php:686) Cannot create a user with no name, no ID, and no actor ID
#0 /srv/mediawiki/php-1.31.0-wmf.25/includes/Block.php(462): User::newFromAnyId(string, string, NULL)
#1 /srv/mediawiki/php-1.31.0-wmf.25/includes/Block.php(492): Block->initFromRow(stdClass)
#2 /srv/mediawiki/php-1.31.0-wmf.25/includes/Block.php(362): Block::newFromRow(stdClass)
#3 /srv/mediawiki/php-1.31.0-wmf.25/includes/Block.php(1195): Block->newLoad(string)
#4 /srv/mediawiki/php-1.31.0-wmf.25/includes/page/Article.php(759): Block::newFromTarget(NULL, string)
#5 /srv/mediawiki/php-1.31.0-wmf.25/includes/page/Article.php(658): Article->getRobotPolicy(string, ParserOutput)
#6 /srv/mediawiki/php-1.31.0-wmf.25/includes/actions/ViewAction.php(68): Article->view()
#7 /srv/mediawiki/php-1.31.0-wmf.25/includes/MediaWiki.php(500): ViewAction->show()
#8 /srv/mediawiki/php-1.31.0-wmf.25/includes/MediaWiki.php(294): MediaWiki->performAction(Article, Title)
#9 /srv/mediawiki/php-1.31.0-wmf.25/includes/MediaWiki.php(861): MediaWiki->performRequest()
#10 /srv/mediawiki/php-1.31.0-wmf.25/includes/MediaWiki.php(524): MediaWiki->main()
#11 /srv/mediawiki/php-1.31.0-wmf.25/index.php(42): MediaWiki->run()
#12 /srv/mediawiki/w/index.php(3): include(string)
#13 {main}
```