In preparation for building from more recent sources, I did

cd /usr/src
rm -rf *

on my HP9000/375 test machine running 1.4P from 2000/01/14.  I had
softdeps enabled on /usr.  A short time later I was rewarded with

  panic: handle_workitem_remove: bad file delta
  Stopped in ioflush at   _cpu_Debugger+0x6:      unlk    a6
  db> t
  _cpu_Debugger(0,6f,0,63192c,519f28) + 6
  _panic(fad51,1cc73c0,0,121b54,13d17c) + 52
  _handle_workitem_remove(1cc73c0) + 62
  _softdep_process_worklist(0) + 10e
  _sched_sync(0) + 1b2
  _proc_trampoline() + 2
  db>

Lots o' stuff was reconnected by fsck upon reboot.

I don't see specific mention of this one in my archives and I don't
know if it's already been fixed or is of any interest at this point.
I've decided to forego softdeps for now but I'll keep the 16MB core
file around for a few days.  If anyone wants it, let me know.

-Steve