| ⇢ | A | ErrorProvider added | |
| ⇢ | A | ErrorHandler added |
| ⇢ | A | Execution::__construct() added | |
| ⇢ | A | ErrorProvider::register() added | |
| ⇢ | A | ErrorHandler::handleError() added | |
| ⇢ | A | GraphQLException::getExtensions() added | |
| ⇢ | A | GraphQLException::setExtensions() added | |
| ⇢ | A | Executor::handleError() added |