Topic on Project:Support desk

If Special:Watchlist has nothing to show to user, some warnings appear.

#0  DatabaseMysql->mysqlDataSeek() called at […/mediawiki-1.23.0/includes/db/DatabaseMysqlBase.php:377]
#1  DatabaseMysqlBase->dataSeek() called at […/mediawiki-1.23.0/includes/specials/SpecialWatchlist.php:320]
#2  SpecialWatchlist->outputChangesList() called at […/mediawiki-1.23.0/includes/specialpage/ChangesListSpecialPage.php:332]
#3  ChangesListSpecialPage->webOutput() called at […/mediawiki-1.23.0/includes/specialpage/ChangesListSpecialPage.php:70]
#4  ChangesListSpecialPage->execute() called at […/mediawiki-1.23.0/includes/specials/SpecialWatchlist.php:79]
#5  SpecialWatchlist->execute() called at […/mediawiki-1.23.0/includes/specialpage/SpecialPage.php:379]
#6  SpecialPage->run() called at […/mediawiki-1.23.0/includes/specialpage/SpecialPageFactory.php:503]
#7  SpecialPageFactory::executePath() called at […/mediawiki-1.23.0/includes/Wiki.php:285]
#8  MediaWiki->performRequest() called at […/mediawiki-1.23.0/includes/Wiki.php:588]
#9  MediaWiki->main() called at […/mediawiki-1.23.0/includes/Wiki.php:447]
#10 MediaWiki->run() called at […/mediawiki-1.23.0/index.php:46]
<br />
<b>Warning</b>:  mysql_data_seek() [<a href='function.mysql-data-seek'>function.mysql-data-seek</a>]: Offset 0 is invalid for MySQL result index 135 (or the query data is unbuffered) in <b>…/mediawiki-1.23.0/includes/db/DatabaseMysql.php</b> on line <b>186</b><br />
#0  DatabaseMysql->mysqlDataSeek() called at […/mediawiki-1.23.0/includes/db/DatabaseMysqlBase.php:377]
#1  DatabaseMysqlBase->dataSeek() called at […/mediawiki-1.23.0/includes/specials/SpecialWatchlist.php:325]
#2  SpecialWatchlist->outputChangesList() called at […/mediawiki-1.23.0/includes/specialpage/ChangesListSpecialPage.php:332]
#3  ChangesListSpecialPage->webOutput() called at […/mediawiki-1.23.0/includes/specialpage/ChangesListSpecialPage.php:70]
#4  ChangesListSpecialPage->execute() called at […/mediawiki-1.23.0/includes/specials/SpecialWatchlist.php:79]
#5  SpecialWatchlist->execute() called at […/mediawiki-1.23.0/includes/specialpage/SpecialPage.php:379]
#6  SpecialPage->run() called at […/mediawiki-1.23.0/includes/specialpage/SpecialPageFactory.php:503]
#7  SpecialPageFactory::executePath() called at […/mediawiki-1.23.0/includes/Wiki.php:285]
#8  MediaWiki->performRequest() called at […/mediawiki-1.23.0/includes/Wiki.php:588]
#9  MediaWiki->main() called at […/mediawiki-1.23.0/includes/Wiki.php:447]
#10 MediaWiki->run() called at […/mediawiki-1.23.0/index.php:46]
<br />
<b>Warning</b>:  mysql_data_seek() [<a href='function.mysql-data-seek'>function.mysql-data-seek</a>]: Offset 0 is invalid for MySQL result index 135 (or the query data is unbuffered) in <b>…/mediawiki-1.23.0/includes/db/DatabaseMysql.php</b> on line <b>186</b><br />

Confirmed and filed as bug 67025.

If you install the mysqli driver PHP extension instead of using the normal mysql driver (which is now obsolete), this error doesn't happen.

The bug has been fixed. It should be fixed in MediaWiki 1.23.1 to be released this Thursday.