```
/srv/mediawiki/php-1.29.0-wmf.3/includes/user/User.php:5123
/srv/mediawiki/php-1.29.0-wmf.3/includes/user/User.php:2766
/srv/mediawiki/php-1.29.0-wmf.3/includes/context/RequestContext.php:364
/srv/mediawiki/php-1.29.0-wmf.3/includes/StubObject.php:207
/srv/mediawiki/php-1.29.0-wmf.3/includes/StubObject.php:169
/srv/mediawiki/php-1.29.0-wmf.3/includes/StubObject.php:112
/srv/mediawiki/php-1.29.0-wmf.3/includes/StubObject.php:139
/srv/mediawiki/php-1.29.0-wmf.3/includes/parser/Parser.php:2110
/srv/mediawiki/php-1.29.0-wmf.3/includes/parser/Parser.php:2075
/srv/mediawiki/php-1.29.0-wmf.3/includes/parser/Parser.php:1290
/srv/mediawiki/php-1.29.0-wmf.3/includes/parser/Parser.php:441
/srv/mediawiki/php-1.29.0-wmf.3/includes/OutputPage.php:1872
/srv/mediawiki/php-1.29.0-wmf.3/includes/OutputPage.php:1895
/srv/mediawiki/php-1.29.0-wmf.3/extensions/AbuseFilter/AbuseFilter.class.php:759
/srv/mediawiki/php-1.29.0-wmf.3/extensions/AbuseFilter/AbuseFilter.class.php:947
/srv/mediawiki/php-1.29.0-wmf.3/extensions/AbuseFilter/AbuseFilterPreAuthenticationProvider.php:41
/srv/mediawiki/php-1.29.0-wmf.3/extensions/AbuseFilter/AbuseFilterPreAuthenticationProvider.php:13
/srv/mediawiki/php-1.29.0-wmf.3/includes/auth/AuthManager.php:1648
/srv/mediawiki/php-1.29.0-wmf.3/includes/Setup.php:866
/srv/mediawiki/php-1.29.0-wmf.3/includes/WebStart.php:137
/srv/mediawiki/php-1.29.0-wmf.3/index.php:40
/srv/mediawiki/w/index.php:3
```
Caused by `AbuseFilter::executeFilterActions` parsing the custom AF warning message on [auto]createaccount filter checks.