GNU bug report logs - #41187
[macOS] 28.0.50; Flipped text

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Message #37 received at 41187 <at> debbugs.gnu.org (full text, mbox):

From: Wasim Abbas <abbas.wasim <at> gmail.com>
To: Alan Third <alan <at> idiocy.org>
Cc: 41187 <at> debbugs.gnu.org
Subject: Re: bug#41187: 28.0.50; Flipped text
Date: Mon, 17 Aug 2020 15:17:32 +0100

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Update:

Just managed to reproduce it with `emacs -Q` I just had to scroll for almost 10 minutes for it to kick in. So ignore my init.el red herring.

//Wasim

> On 17 Aug 2020, at 15:10, Wasim Abbas <abbas.wasim <at> gmail.com> wrote:
> 
> So I spend some more time on this today. Its painful to keep scrolling forever but I think I have found a pattern that works reliably.
> 
> Open emacs with a specific header file from command line. /usr/local/Cellar/emacs-head/HEAD-86fef6a_1/Emacs.app/Contents/MacOS/Emacs /personal/roar_engine/core/rhi/rorrhi_types.hpp
> M-x split-window-horizontally and start scrolling between the two windows interchangeably.
> 
> I did a binary search through my packages but it was inconclusive. It appeared with single package, but different single packages at different times. So I started commenting out my whole init.el file.
> 
> (setq user-full-name "Wasim Abbas")
> (setq user-mail-address "abbas.wasim <at> gmail.com <mailto:abbas.wasim <at> gmail.com>")
> 
> ;; load my sexp from elisp dir
> (add-to-list 'load-path (expand-file-name "elisp" user-emacs-directory))
> ;; add custom theme folder to load themes from ~/.emacs.d/themes
> (add-to-list 'custom-theme-load-path (expand-file-name "themes" user-emacs-directory))
> 
> This is the only snippet that I can reproduce it with. This doesn’t make much sense. I am not using any themes later on. The whole init.el is empty after these lines. I have reproduced it with this a few times.
> <Screenshot 2020-08-17 at 15.03.55.png>
> Although I have still not managed to reproduce it with `-Q` option yet.
> 
> Also at one point I got the following segfault.
> 
> <Screenshot 2020-08-17 at 15.03.05.png>
> 
> 
> //Wasim
> 
>> On 10 Aug 2020, at 20:11, Alan Third <alan <at> idiocy.org <mailto:alan <at> idiocy.org>> wrote:
>> 
>> On Mon, Aug 10, 2020 at 12:40:31PM +0100, Wasim Abbas wrote:
>>> I thought since drawing buffers and rendering is such a core thing
>>> to emacs I wasn’t sure it will be anything else (like a package) but
>>> looks like it could be? Would you now think it's something to do
>>> with any package?
>> 
>> It's unlikely to be a package directly causing it, but it may be doing
>> something which causes a bug in Emacs itself to show.
>> 
>>> Is the standard disable each package one by one and see if it can be
>>> narrowed down to a single package the way to go forward now?
>> 
>> The usual way would be a binary search type strategy. Comment out half
>> your config, then see if you still have the problem, if not try the
>> other half. Then you half what remains, and repeat until you've found
>> the cause.
>> 
>> The problem is that it may be a combination of things that are causing
>> it, but at least it may give us a chance to get a minimal recipe to
>> replicate the bug.
>> -- 
>> Alan Third
> 

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