panic today when doing shutdown and boot warnings

I haven't noticed these before so I thought I would mention them:

Nov 30 18:01:39 server kernel: Timecounters tick every 1.000 msec
Nov 30 18:01:39 server kernel: WARNING: attempt to net_add_domain(local) after domainfinalize()
Nov 30 18:01:39 server kernel: WARNING: attempt to net_add_domain(internet6) after domainfinalize()
Nov 30 18:01:39 server kernel: WARNING: attempt to net_add_domain(route) after domainfinalize()
Nov 30 18:01:39 server kernel: WARNING: attempt to net_add_domain(internet) after domainfinalize()

I have no idea what they mean.

Plus, with an amd64 kernel compiled just a little while ago I get a drop
into the debugger on shutdown:

I typed "reboot"...

Nov 30 17:56:55 server reboot: rebooted by root
Nov 30 18:01:39 server syslogd: kernel boot file is /boot/kernel/kernel
Nov 30 18:01:39 server kernel: interrupt                   total
Nov 30 18:01:39 server kernel: irq1: atkbd0                         826
Nov 30 18:01:39 server kernel: irq0: clk                        3441687
Nov 30 18:01:39 server kernel: irq4: sio0                             6
Nov 30 18:01:39 server kernel: irq8: rtc                         220405
Nov 30 18:01:39 server kernel: irq14: ata0                       162189
Nov 30 18:01:39 server kernel: irq15: ata1                          172
Nov 30 18:01:39 server kernel: irq16: re0                         42589
Nov 30 18:01:39 server kernel: irq17: fwohci0                         1
Nov 30 18:01:39 server kernel: irq19: dc0                             2
Nov 30 18:01:39 server kernel: irq20: atapci0                    121462
Nov 30 18:01:39 server kernel: irq21: uhci0 uhci1+                  379
Nov 30 18:01:39 server kernel: Total                     3989718
Nov 30 18:01:39 server kernel: KDB: stack backtrace:
Nov 30 18:01:39 server kernel: hardclock() at hardclock+0x21b
Nov 30 18:01:39 server kernel: intr_execute_handlers() at intr_execute_handlers+0x102
Nov 30 18:01:39 server kernel: lapic_handle_intr() at lapic_handle_intr+0x21
Nov 30 18:01:39 server kernel: Xapic_isr1() at Xapic_isr1+0x7d
Nov 30 18:01:39 server kernel: --- interrupt, rip = 0xffffffff8047ab16, rsp = 0xffffffffb188dba0, rbp = 0xffffffffb188dbb0 ---
Nov 30 18:01:39 server kernel: acpi_cpu_c1() at acpi_cpu_c1+0x6
Nov 30 18:01:39 server kernel: acpi_cpu_idle() at acpi_cpu_idle+0x178
Nov 30 18:01:39 server kernel: idle_proc() at idle_proc+0x9d
Nov 30 18:01:39 server kernel: fork_exit() at fork_exit+0x8f
Nov 30 18:01:39 server kernel: fork_trampoline() at fork_trampoline+0xe
Nov 30 18:01:39 server kernel: --- trap 0, rip = 0, rsp = 0xffffffffb188dd00, rbp = 0 ---

I tried to just continue, but I end up back in the debugger again.