trap 12 with preempt (and ule)

[Randy Bush]

>> this was not happening with no preempt
> Yeah, there's no one looking at fixing all of the ULE bugs for now --
> so make sure to not turn on PREEMPTION.

i thought the preeempt fix was in the must-do for 5.3.  so when it
was not in this week's list, i figured it was fixed and would work
in current.  silly me.  must have mis-read or mis-understood.  ah
well.

randy