I updated to a debug kernel from about 8 hours ago, and the bulk build
I started then is still running.

However, in my dmesg output I see:
pid 12696 (try), uid 0: exited on signal 10 (core dumped)
pid 19715 (conftest), uid 0: exited on signal 11 (core dumped)
pid 11407 (conftest), uid 0: exited on signal 6 (core dumped)
pid 13556 (a2ps), uid 0: exited on signal 11 (core dumped)
pid 3877 (conftest), uid 0: exited on signal 6 (core dumped)
pid 5407 (conftest), uid 0: exited on signal 11 (core dumped)
pid 10971 (conftest), uid 0: exited on signal 6 (core dumped)

The first one, try, happens when building perl (repeatable for me).
I'm not sure when the others happened, sorry.
 Thomas