Panics with HEAD code from yesterday evening

[Hasso Tepper]

I had several panics in laptop today, luckily I was in console during last 
one and could quickly write down backtrace at least. Getting coredump 
failed for some reason.

panic: assertion: (_ifac)->ifa_magic == IFA_CONTAINER_MAGIC in _IFAFREE
mp_lock = 00000001; cpuid = 1
Trace beginning at frame 0xda9f2c30
panic(c05b7f4f,1,c058ecf7,da9f2c64,da9f2c64) at panic+0x172
panic(c058ecf7,c05deb28,c057132c,1,21901451) at panic+0x172
rtfree(c41ccb00,e90b4900,c402d530,c41cf760,0) at rtfree+0xcb
ip_output(e8d37b00,0,dade1d7c,0,0) at ip_output+0x34d
udp_send(c42558e0,0,e8d37b00,0,0) at udp_send+0x2a7
netmsg_pru_send(e86acb6c,0,0,c02f7325,0) at netmsg_pru_send+0x36
netmsg_service_loop(0,0,0,0,0) at netmsg_service_loop+0xe
lwkt_exit() at lwkt_exit


-- 
Hasso Tepper