On Thu, November 7, 2013 03:04, Bram Moolenaar wrote:
> Christian Brabandt wrote:
>> ./vim -u NONE -N -c ':set ul=5'
>> 1):for i in range(1,10)| call feedkeys("o".i."\e", 't')|endfor
>> (i.e. make sure echo line is a single undoable change).
>> 2)(undo as long as it is possible, e.g. press u 6 times)
>> 3)(press o7<esc>)
> I'm glad you found this problem. But your solution is just working
> around it. The problem is that when deleting the curbuf->b_u_oldhead
> branch it actually only deletes one entry. It requires a loop to delete
> the whole of the branch.
>
> I'll make a patch that does it this way. The tests pass, but please
> check if there isn't a problem that the tests don't cover.
But that means once the complete undo branch is undone and one adds
another change, one loses all undo information? So after step 3, you
will only be able to undo exactly step 3 and not get further, although
the undolevels is at 5?
Well, my attempt wasn't any better. Although my patch preserved the
undo history, Vim yelled at me with an E438: u_undo: line numbers
wrong.
regards,
Christian
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