Fatal trap 30 w/ latest 8.0-BETA2/amd64

[Jason Harmening]

Sorry for the partial dump--I don't (yet) have a swap partition, so I
can't do postmortem:

Machine is nehalem (4 cores + HT):

FreeBSD riviera.austin.rr.com 8.0-BETA2 FreeBSD 8.0-BETA2 #1: Thu Aug
20 09:06:25 CDT 2009
jason at riviera.austin.rr.com:/usr/obj/usr/src/sys/CUSTOM  amd64

current process = 11 (idle: cpu1)
[Thread pid 11 tid 100009 ]
Stopped at acpi_cpu_c1+0x6: popq %rbp
Tracing pid 11 tid 100009 td 0xffffff000169dab0
acpi_cpu_c1() at acpi_cpu_c1+0x6
acpi_cpu_idle() at acpi_cpu_idle+0x13b
cpu_idle_acpi() at cpu_idle_acpi+0x1f
cpu_idle() at cpu_idle+0x1c
sched_idletd() at sched_idletd+0x258
fork_exit() at fork_exit+0x147
fork_trampoline() at fork_trampoline+0xe
--- trap 0, rip = 0, rsp = 0xffffff8000076d30, rbp = 0