qvm-firewall doesnt accept dest6=::/0

[b90g]

How to file a helpful issue

Qubes OS release

4.2.2-rc1

Brief summary

Trying to create a firewall rule that only allows ipv6 traffic results in allowing all traffic.

( kind of like qvm-featues ipv4 '' which does only exist for ipv6)

Steps to reproduce

set up firewall to drop everything in GUI then:

$ qvm-firewall calendar add --before=0 accept proto=tcp dst6=::/0

Expected behavior

0 accept ::/0 tcp - - - - -

Actual behavior

0 accept - tcp - - - - -

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https://forum.qubes-os.org/t/trying-do-disable-most-ipv4-traffic/27160