Re: Strange Emacs crash

[Richard Stallman]

    > I must say I don't understand why the call to `delete-region' doesn't 
itself
    > clear the accurate state of the window's display matrix.

    Netiher do I (or I would have fixed _that_ problem).

    But commands which modifies buffers don't generally have any direct
    effect on whether WINDOW showing the buffer are accurate or not;
    instead they simply update MODIFF on the buffer and redisplay
    notices that the buffer has been modified, and DTRT...

That's correct.  The idea is that redisplay should notice whether
the buffer changes.

Why DOESN'T that work, in this case?