Kernel builds, but crashes at boot (amd64, Revision: 234306)

[Conrad J. Sabatier]

Today I'm suddenly unable to boot a newly built kernel without crashing
right near the end of the device probes, just before the system is
about to actually come up:

Fatal trap 18: integer divide fault while in kernel mode

Stopped at 0xffffffff803b2646 = g_label_ufs_taste_common+0x36
divl 0x50(%rcx),%eax

Backtrace lists this chain of calls:
g_label_ufs_taste_common
g_label_taste
g_new_provider_event
g_run_events
g_event_procbody
fork_exit
fork_trampoline

Whether built with clang or gcc, CUSTOM config or GENERIC, same results
on rebooting.  No idea why this suddenly started happening, haven't
changed anything at all in my setup.

-- 
Conrad J. Sabatier
conrads at cox.net