Re: 23.0.50; Display bug with vline.el and viper

["Lennart Borgman (gmail)" <lennart.borgman@gmail.com>]

Vinicius Jose Latorre wrote:
> 
>> Strange. I just tested again with the latest vline.el from EmacsWiki 
>> and inserted (redisplay t) as the last thing in vline-show. Same bug.
>>
>> When I tested I had (window-height) => 4, ie 3 lines are shown, and 
>> (window-height) => 46. I had vline.el in the buffer. Cursor at left 
>> side (is it column 0 or 1?;-). Just hold down arrow-down.
>>
>> It does not get past the row starting with
>>
>>  ;; Author: Taiki SUGAWARA <buzz.taiki@gmail.com>
> 
> The vline.el that I'm using is attached to this email.
> 
> Please, check if we are using the same file and patch.
> 
> I'm using:
> 
> GNU Emacs 23.0.50.2 (i686-pc-linux-gnu, GTK+ Version 2.12.1)
> of 2008-01-12 on debian-hillux
> 
> These are the steps I've done:
> 
> 
> 1. emacs -Q vline.el
> 
> 2. shrink Emacs until display 27 columns;
>    (So you have a lot of long lines)
> 
> 3. M-x eval-buffer RET
> 
> 4. M-x vline-mode RET
> 
> 5. C-n (several, well, you can hold the key pressed)
>     It's all right until here.
> 
> 6. shrink Emacs until display 3 lines;
> 
> 7. C-n (several, again, you can hold the key pressed)
>    Continue all right.
> 
> 
> Without the patch, it has some problems.

Hm, you placed (redisplay t) inside the (save-excursion ...) form. That 
cures the bug I reported, but it gives other very strange bugs. Maximize 
the window and then press up and down arrows. Instead of just moving the 
point at least up arrow much of the time scrolls the window.