[rt-users] Unshreddable users

[Jerrad Pierce]

I have a user without any tickets (created by spam that got into the
system) that I cannot shred:

Couldn't wipeout object: Can't call method "Type" on an undefined
value at /opt/rt3/bin/../lib/RT/Shredder/GroupMember.pm line 90.
Stack: [/opt/rt3/bin/../lib/RT/Shredder/GroupMember.pm:90]
[/opt/rt3/bin/../lib/RT/Shredder/Record.pm:112]
[/opt/rt3/bin/../lib/RT/Shredder.pm:581]
[/opt/rt3/bin/../lib/RT/Shredder.pm:591]
[/opt/rt3/bin/../lib/RT/Shredder/Dependencies.pm:146]
[/opt/rt3/bin/../lib/RT/Shredder.pm:592]
[/opt/rt3/bin/../lib/RT/Shredder.pm:551]
[/opt/rt3/bin/../lib/RT/Shredder.pm:540]
[/opt/rt3/share/html/Admin/Tools/Shredder/index.html:158]
[/opt/rt3/share/html/Admin/Tools/Shredder/autohandler:59]
[/opt/rt3/share/html/Admin/autohandler:49]
[/opt/rt3/share/html/autohandler:308

The only potentially relevant RT log entries are (approximate time of
attempted shredding):

[Mon Jul 20 16:01:00 2009] [warning]: Use of uninitialized value in
concatenation (.) or string at
/opt/rt3/bin/../lib/RT/Principal_Overlay.pm line 127.
(/opt/rt3/bin/../lib/RT/Principal_Overlay.pm:127)
[Mon Jul 20 16:01:00 2009] [crit]: Found a principal () that was
neither a user nor a group
(/opt/rt3/bin/../lib/RT/Principal_Overlay.pm:127)
[Mon Jul 20 16:01:06 2009] [error]: Couldn't load 'RT::User' object
with id '7796' (/opt/rt3/bin/../lib/RT/Shredder.pm:359)

But the user id is 646


Any ideas?
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