GNU bug report logs - #18601
24.3.94; set-fringe-mode with left fringe 0 breaks window width calculations on Mac OS

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From: martin rudalics <rudalics <at> gmx.at>
To: Constantine Vetoshev <vetoshev <at> gmail.com>, 18601 <at> debbugs.gnu.org
Subject: bug#18601: 24.3.94; set-fringe-mode with left fringe 0 breaks window width calculations on Mac OS
Date: Thu, 02 Oct 2014 20:44:31 +0200

> The Emacs pretest released earlier today has a window width
> calculation bug on Mac OS X when the window left fringe is turned off.
> This bug is not present in the previous Emacs pretest, version
> 24.3.93.
>
> The outward symptoms of this bug are similar to those #16470, fixed in
> January of this year.

Did it work after #16470 was fixed?

> To reproduce, do the following:
>
> 1. Start Emacs 24.3.94 (with -Q to avoid loading initialization files).
> 2. Execute this Elisp: (set-fringe-mode '(0 . 2))
> 3. Execute M-x ansi-term and select /bin/zsh as your shell.
> 4. Run 'ls' or any other command in the shell. Notice the spurious %
> characters printed everywhere. This is the bug.
>
> Setting the fringe to '(1 . 2) makes the problem go away.

Please post the results of `window--dump-frame' for both the (0 . 2) and
the (1 . 2) fringes frame.  I suppose the frame has only one window.

> I'm wondering if this commit is related to this bug?
> http://git.savannah.gnu.org/cgit/emacs.git/commit/?h=emacs-24&id=984a7aaadb9c10a60621b729a86d6b13a471b92b

To verify you could easily try using the old code instead.  But I doubt
that this is related.

martin

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