Breaking: #72293 - API change in ExceptionHandlerInterface

See Issue #72293


The class \Throwable was added in PHP7 as new parent of \Exceptions. So we were in need to remove the type hint in Issue #72117, which we now read as \Throwable instead of \Exception as we only support PHP 7.0 or newer. See


A fatal error will be thrown if you use own ExceptionHandlers implementing TYPO3\CMS\Core\Error\ExceptionHandlerInterface “Fatal error: Declaration of … must be compatible with …”

Affected Installations

Installations which use an own ExceptionHandler implementing TYPO3s ExceptionHandlerInterface.


Add \Throwable as type hinting in your implementation of ExceptionHandlerInterface. Check the API/type hinting of the method where you process the exception.