NetBSD: crash in DSI guess_interface()

[rdmark]

When netatalk starts up and has to detect its DSI interface:

Jan 18 16:47:56.523427 afpd[7935] {afp_config.c:221} (debug:AFPDaemon): DSIConfigInit: hostname: net101, listen: -, interfaces: -, port: 548
Jan 18 16:47:56.531404 afpd[7935] {dsi_tcp.c:497} (info:DSI): dsi_tcp_init: getaddrinfo 'net101': No address associated with hostname

Jan 18 16:47:56.531592 afpd[7935] {dsi_tcp.c:287} (info:DSI): dsi_tcp: '192.168.64.10:548' on interface 'wm0' will be used instead.
Jan 18 16:47:56.531671 afpd[7935] {fault.c:123} (severe:Default): ===============================================================
Jan 18 16:47:56.531710 afpd[7935] {fault.c:124} (severe:Default): INTERNAL ERROR: Signal 11 in pid 7935 (4.0.6)
Jan 18 16:47:56.531749 afpd[7935] {fault.c:125} (severe:Default): ===============================================================
Jan 18 16:47:59.587638 netatalk[16057] {afp_mdns.c:251} (error:AFPDaemon): Failed to add service: _afpovertcp._tcp, error=-65563
Jan 18 16:47:59.587755 netatalk[16057] {netatalk.c:515} (note:Default): Registered with Zeroconf
Jan 18 16:47:59.589098 netatalk[16057] {netatalk.c:225} (info:Default): child[7935]: killed by signal 6

This crash has recently started appearing in my NetBSD 10.0 and 10.1 VMs, with any recent version of netatalk (including Hauke's netatalk4 pkgsrc package.) This didn't happen before with the exact same setup, so something else must have changed environmentally.

When setting f.e. afp interfaces = wm0 in afp.conf, netatalk will start up fine.

[rdmark]

I'm not seeing a crash anymore in main, but the interface auto detection is still failing.