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Bug #82962

Updated by Thomas Hohn over 6 years ago

It some of out TYPO3 installations we sometime see the following error when a login attempt has failed. 
 <pre> 
 Core: Error handler (FE): PHP Warning: array_merge(): Argument #1 is not an array  
 typo3_src/typo3/sysext/frontend/Classes/Authentication/FrontendUserAuthentication.php line 412  
 </pre> 
 So there might be conditions where $this->user can be something that's not an array or null it that case the statement 
 <pre> 
 $this->user = array_merge($this->user ?? [], $updatedSession); 
 </pre> 
 Instead its should be replaced by: 
 <pre> 
 $this->user = array_merge($this->user ? $this->user : [], $updatedSession); 
 </pre> 
 The should be done line line 403 and 412

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