bug#13262: 24.3.50; crash when multibyte directory name completion.

[martin rudalics]

> Any chance of a recipe?  Also, what data causes the crash?

I create a standalone minibuffer window, insert some Lisp text into it,
and scroll that window with the mouse.  After a few times the crash
happens.  Hardly a realistic scenario and so far irreproducible with
emacs -Q.  I'd have to bisect my .emacs but this will take some time.

> Better file a new bug report, btw.

I'll do that as soon as I have a presentable recipe.

> Also, does this buffer position make sense?
>
>   Program received signal SIGSEGV, Segmentation fault.
>   0x0107160b in FETCH_MULTIBYTE_CHAR (pos=54295370) at buffer.h:1168
>                                       ^^^^^^^^^^^^
>
> Were you indeed editing a 54MB buffer?

No.  There were at most a few 100 characters in the minibuffer.

martin