daf: rewrite not working in 5.5.1

My daf config stopped working after upgrading from 5.4.3 to 5.5.1. It seems related to the recent changes to the renumber module.

Config

daf.add('src = 192.168.0.0/24 rewrite host.domain.local. A 192.168.0.1')

After adding the below debug config, I noticed an error related to the renumber module.

Debug Config

policy.add(policy.suffix(policy.DEBUG_ALWAYS, policy.todnames({'host.domain.local'})))

Logs

[system] error: /usr/lib/knot-resolver/kres_modules/renumber.lua:33: attempt to compare number with nil

After reverting to the 5.4.3 version of renumber.lua, daf rewrite works again, so the recent renumber changes seem to have broken this in 5.5.1.