I've tested systemd 247.3-3ubuntu3.6 from hirsute-proposed in a VM and
can verify it is working as expected.

I used the configuration provided and kept the VM running for several days 
without any crash:
```
root@hh-vm:~# cat /etc/systemd/resolved.conf 
[Resolve]
DNS=46.182.19.48#dns2.digitalcourage.de 1.1.1.1#cloudflare-dns.com 
9.9.9.9#dns.quad9.net
DNSSEC=yes
DNSOverTLS=true
MulticastDNS=no
LLMNR=no
Cache=no
DNSStubListener=yes
Domains=~.
root@hh-vm:~# dmesg | grep segfault
root@hh-vm:~# dmesg | grep "systemd-resolve"
root@hh-vm:~# resolvectl query google.com
google.com: 142.250.185.238                    -- link: enp5s0
            2a00:1450:4001:813::200e           -- link: enp5s0

-- Information acquired via protocol DNS in 121.0ms.
-- Data is authenticated: no
```

DNS requests are working as expected and I could not provoke a crash by
disconnecting the network interface midway through a DNS request,
forcing a timeout.

** Tags removed: verification-needed-hirsute
** Tags added: verification-done-hirsute

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https://bugs.launchpad.net/bugs/1934221

Title:
  systemd-resolve segfault

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