Re: mark_object crash in 22.1 and latest CVS (as of tonight)

[martin rudalics]

> Agreed.  The field was moved by Richard on 14-Oct-2002 but the change
> log doesn't say why this was done, so I just undid it.

Does this mean those cells always survived the current cycle?
Then we now have a chance to test whether the "remove unmarked
markers from the undo list" stuff really works in one and the
same collection cycle.  Interesting.

Stefan, unless you have already done so, could you please fix
those identic

"If a buffer's undo list is Qt, ..."

comments in alloc.c too?  The second mentions truncate_undo_list
which hardly makes sense.