Re: bug#530: Emacs 22 occasionally loses undo buffer?

[seanlanter]

On Jul 3, 4:14 pm, "Casey Muratori" <ca...@mollyrocket.com> wrote:
> I'm a long-time GNU Emacs user, and recently I updated to 22.x.
>
> In 21.x, I never had any problems with undo, but in both 22.1 and 22.2
> I will get an occasional loss of undo information for no apparent
> reason.  After some editing operation, usually a kill or the undo of a
> kill, etc., Emacs spontaneously decides that there is "no further undo
> information", even though there clearly was, and the buffer is still
> marked as modified.
>
> It seems to happen _less_ frequently in 22.2 than in 22.1 so far, but
> it's hard to tell, since I've been unable to come up with a reliable
> way to reproduce the bug.
>
> Is this a known problem?  Has anyone else reported something similar?
> I've been trying to think of a way to debug it, but it seems very
> difficult since there's no way to know when the bug will happen, and
> once it happens, it's presumably too late to find out why...
>
> This is running under Win32, btw, if that makes any difference: GNU
> Emacs 22.2.1 (i386-mingw-nt5.1.2600)
>
> - Casey

Ditto.  I have 22.1 running on 64-bit Ubuntu 8.04, and I see the "no
further undo information" message at random times.  The question
stands: Is this a known problem other than to just two of us?