Thanks for the report.
mv-4.0 had a bug, though I don't recall this one causing a segfault.
It has been fixed in test releases for some time.
I recommend that people use the latest test release:
ftp://alpha.gnu.org/gnu/fetish/fileutils-4.0q.tar.gz
Here is what I did, with the number in my prompt being the
exit code according to bash:
[acahalan_5x] 0 enterprise:cs$ ls -l
total 152
drwxr-xr-x 6 acahalan software4096 Mar 13 19:26 .
drwxr-xr-x 39 acahalan software 24576 Mar 13 19:23 ..
-rw-rw-r-- 1 acahalan software2058 Mar 10 1