Why do I get the following errors: general: errno2result.c:109: unexpected error:general: unable to convert errno to isc_result

In more detail - this is what you might see:

general: errno2result.c:109: unexpected error:
general: unable to convert errno to isc_result: 14: Bad addressclient: UDP client handler shutting down due to fatal receive error: unexpected error

It is the result of a Linux kernel bug.