With a 21 Nov -current/i386, I get:

sed: stdout: No space left on device 
sed: stdout: No space left on device
[: file: unexpected operator
[: file: unexpected operator 

in the daily insecurity email and
...
uid 0, pid 13051, command column, on /: file system full
uid 0, pid 23392, command ci, on /: file system full
uid 0, pid 20980, command ci, on /: file system full
uid 0, pid 1979, command cat, on /: file system full
uid 0, pid 26653, command sed, on /: file system full
uid 0, pid 7346, command ls, on /: file system full
uid 0, pid 14798, command sed, on /: file system full
uid 0, pid 25121, command ls, on /: file system full
uid 0, pid 28394, command column, on /: file system full
...

Filesystem    Size      Used     Avail Capacity  Mounted on
/dev/sd0a      97M       51M       42M    55%    /
/dev/sd0e     993M      298M      645M    31%    /var

It looks like the sort of commands to create /var/backups, but what
uses 42M of diskspace?! (Haven't UTSL yet..)

Cheers,

Patrick