MediaWiki 1.26alpha (1747b12)
PHP 5.6.8 (apache2handler)
MySQL 5.6.24
and
```
$wgDBprefix = "mw-core";
$wgObjectCaches['redis'] = array(
'class' => 'RedisBagOStuff',
'servers' => array( '127.0.0.1:6379' )
);
$wgMainCacheType = 'redis';
```
failed for a normal article edit with:
```
Notice: Array to string conversion in ...\mw-core\includes\db\Database.php on line 2223
A database query error has occurred. This may indicate a bug in the software.
Query:
SELECT 1 FROM `mw-corepage` WHERE (Array) LIMIT 1
Function: ApiStashEdit::checkCache
Error: 1054 Unknown column 'Array' in 'where clause' (localhost)
Backtrace:
#0 ...\mw-core\includes\db\Database.php(1231): DatabaseBase->reportQueryError('Unknown column ...', 1054, 'SELECT 1 FROM...', 'ApiStashEdit::c...', false)
#1 ...\mw-core\includes\db\Database.php(1757): DatabaseBase->query('SELECT 1 FROM...', 'ApiStashEdit::c...')
#2 ...\mw-core\includes\db\Database.php(1424): DatabaseBase->select('page', '1', '(Array)', 'ApiStashEdit::c...', Array)
#3 ...\mw-core\includes\api\ApiStashEdit.php(289): DatabaseBase->selectField('page', '1', '(Array)', 'ApiStashEdit::c...')
#4 ...\mw-core\includes\page\WikiPage.php(2067): ApiStashEdit::checkCache(Object(Title), Object(WikitextContent), Object(User))
#5 ...\mw-core\includes\page\WikiPage.php(1756): WikiPage->prepareContentForEdit(Object(WikitextContent), NULL, Object(User), 'text/x-wiki')
#6 [internal function]: WikiPage->doEditContent(Object(WikitextContent), '', 98, false, NULL, 'text/x-wiki')
#7 ...\mw-core\includes\page\Article.php(2017): call_user_func_array(Array, Array)
#8 ...\mw-core\includes\EditPage.php(1948): Article->__call('doEditContent', Array)
#9 ...\mw-core\includes\EditPage.php(1948): Article->doEditContent(Object(WikitextContent), '', 98, false, NULL, 'text/x-wiki')
#10 ...\mw-core\includes\EditPage.php(1322): EditPage->internalAttemptSave(Array, false)
#11 ...\mw-core\includes\EditPage.php(557): EditPage->attemptSave(Array)
#12 ...\mw-core\includes\actions\EditAction.php(56): EditPage->edit()
#13 ...\mw-core\includes\actions\SubmitAction.php(40): EditAction->show()
#14 ...\mw-core\includes\MediaWiki.php(457): SubmitAction->show()
#15 ...\mw-core\includes\MediaWiki.php(255): MediaWiki->performAction(Object(Article), Object(Title))
#16 ...\mw-core\includes\MediaWiki.php(678): MediaWiki->performRequest()
#17 ...\mw-core\includes\MediaWiki.php(475): MediaWiki->main()
#18 ...\mw-core\index.php(41): MediaWiki->run()
#19 {main}
```