| ⇢ | A | DefaultFormatter added | |
| ⇢ | A | Handler added |
| ⇢ | A | DefaultFormatter::format() added | |
| ⇢ | A | AbstractKernel::registerExceptionHandler() added | |
| ⇢ | A | Handler::handleException() added | |
| ⇢ | A | Handler::__construct() added | |
| ⇢ | A | Handler::registerErrorHandler() added | |
| ⇢ | A | Handler::registerExceptionHandler() added | |
| ⇢ | A | Handler::handleError() added | |
| A | ↛ | AbstractKernel::createErrorHandler() removed |