Summary of a problem or a feature request

PHPStan reports incorrect "Variable $request might not be defined" warning. See the demo: https://phpstan.org/r/dd86ad8a-ffd3-4c6c-84f2-dc72189c973d

Code snippet that reproduces the problem

https://phpstan.org/r/dd86ad8a-ffd3-4c6c-84f2-dc72189c973d

Expected output

This error should not be reported since Throwable should define the variable $response in case of error.