GNU bug report logs - #56393
Actually fix the long lines display bug

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From: Gregory Heytings <gregory <at> heytings.org>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: gerd.moellmann <at> gmail.com, larsi <at> gnus.org, 56393 <at> debbugs.gnu.org
Subject: bug#56393: Actually fix the long lines display bug
Date: Sat, 09 Jul 2022 11:20:30 +0000

>> Here's one problem caused by using PT in get_narrowed_begv:
>>
>>  emacs -Q
>>  C-x C-f src/xdisp.c RET
>>  C-x 2
>>  M->
>> 
>> Now move the mouse pointer over the "other" window, the one which still 
>> shows xdisp.c at BOB, and turn the mouse wheel to scroll the window 
>> towards the end of the buffer.  This segfaults:
>> 
>> The problem is that narrowed_begv was computed using PT, which doesn't 
>> correspond to the window's point, and so the logic in 
>> get_visually_first_element backfires.
>
> Yes, I understand and noted that I should use window-point instead of 
> PT.
>

(That being said, I cannot reproduce that here either.)

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