GNU bug report logs - #42904
[PATCH] Non-Unicode frame title crashes Emacs on macOS

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From: Eli Zaretskii <eliz <at> gnu.org>
To: Mattias Engdegård <mattiase <at> acm.org>
Cc: 42904 <at> debbugs.gnu.org, alan <at> idiocy.org
Subject: bug#42904: [PATCH] Non-Unicode frame title crashes Emacs on macOS
Date: Tue, 18 Aug 2020 15:22:11 +0300

> From: Mattias Engdegård <mattiase <at> acm.org>
> Date: Tue, 18 Aug 2020 13:48:10 +0200
> Cc: Eli Zaretskii <eliz <at> gnu.org>, 42904 <at> debbugs.gnu.org
> 
> Anyway, here is an alternative patch using your method. Tell us what you think.

Thanks, but I don't think we should modify the :default-char attribute
of the UTF-* encodings as part of this change.  It's a separate issue,
and is a backward-incompatible change of sorts.  For instance, we
should consider what this will do to display on TTY frames that don't
support Unicode.  So I think we should discuss this issue separately
before we make such a change.

Why is it a problem to display a space instead of invalid bytes in
this case?

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