amd64 panic

[Patrick Welche <prlw1%cam.ac.uk@localhost>]

With this morning's source, DEBUG/DIAGNOSTIC amd64 kernel dropped into ddb,
but not sure why:

db{0}> examine/s panicstr
netbsd:panicstr:        x\024\205\200\377\377\377\377\365N
db{0}> bt
breakpoint() at netbsd:breakpoint+0x5
comintr() at netbsd:comintr+0x53a
Xintr_ioapic_edge9() at netbsd:Xintr_ioapic_edge9+0xef
--- interrupt ---
x86_pause() at netbsd:x86_pause+0x2
intr_biglock_wrapper() at netbsd:intr_biglock_wrapper+0x16
Xintr_ioapic_level5() at netbsd:Xintr_ioapic_level5+0xf7
--- interrupt ---
Xspllower() at netbsd:Xspllower+0xe
DDB lost frame for netbsd:Xsoftintr+0x50, trying 0xffff80004beacd70
Xsoftintr() at netbsd:Xsoftintr+0x50
--- interrupt ---
0:
db{0}> mach cpu 1
using CPU 1
db{0}> bt
iic_smbus_intr_thread() at netbsd:iic_smbus_intr_thread+0x2a

Cheers,

Patrick