Use new logError in FrontController, tests

app/FrontController.php

@@ -143,6 +143,7 @@ class FrontController
                         header('HTTP/1.0 500 Internal Server Error');
                     }
                 }
+                ErrorHandler::logError($e);
                 return ErrorHandler::showDebug($e);
             }
             $layout_class = $this->getRouter()->getErrorLayout();