bug#11199: 24.0.95; killing right-to-left text at eob leads to inconsistent state

[Michael Welsh Duggan]

Eli Zaretskii <eliz@gnu.org> writes:

> Here's the patch to try:
>
> === modified file 'src/xdisp.c'
> --- src/xdisp.c       2012-03-31 19:30:53 +0000
> +++ src/xdisp.c       2012-04-09 11:46:50 +0000
> @@ -16602,7 +16602,15 @@ find_last_unchanged_at_beg_row (struct w
>            continued.  */
>         && !(MATRIX_ROW_END_CHARPOS (row) == first_changed_pos
>              && (row->continued_p
> -                || row->exact_window_width_line_p)))
> +                || row->exact_window_width_line_p))
> +       /* If ROW->end is beyond ZV, then ROW->end is outdated and
> +          needs to be recomputed, so don't consider this row as
> +          unchanged.  This happens when the last line was
> +          bidi-reordered and was killed immediately before this
> +          redisplay cycle.  In that case, ROW->end stores the
> +          buffer position of the first visual-order character of
> +          the next row, which is now beyond ZV.  */
> +       && CHARPOS (row->end.pos) <= ZV)
>       row_found = row;
>  
>        /* Stop if last visible row.  */
>

I can verify that this patch keeps the original recipe from causing
Emacs to crash.  Everything looks good for now.

-- 
Michael Welsh Duggan
(md5i@md5i.com)