S48 - Crash at GC write barrier

I ran the Scheme 48 test suite earlier today, and it crashed with the
following output:


[posix-tests
[posix-core-tests
 (file-mode-predicates)
 (file-modes)
 (make-directory)
 (time)
 (set-working-directory!)
 (i/o-flags)
 (append-mode)
 (file-timesscheme48vm: ./c/bibop/area_roots.h:72: s48_write_barrier_inline: Assertion `address < area->frontier' failed.


I ran “make check” again, and could not reproduce the crash; I also
couldn't find a core file to debug this with anywhere on my system.

Robert Ransom