Excerpts from netbsd: 2-Oct-98 Ultrix RC5-Client under -cu.. Marc
Gutschner@triplan.c (1065*)

> Is this due to the recent 
> changes in the signal handling stuff in -current or is there some 
> special ritual I'll have to perform before running Ultrix binaries ? 

The Ultrix emulation is slightly broken since the sigmask
changes. This should primarily affect longjmp's.
I've prepared a fix, and was looking for ways to test
it. So I'll try the RC5 thing if I find it...

best regards
Matthias