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bug#44329: 28.0.50; Crash in bidi_mirror_char on view-hello-file when no
From: |
Stefan Kangas |
Subject: |
bug#44329: 28.0.50; Crash in bidi_mirror_char on view-hello-file when no bidi-display-reordering (harfbuzz) |
Date: |
Fri, 30 Oct 2020 23:29:58 +0000 |
Eli Zaretskii <eliz@gnu.org> writes:
>> Is there something like make-obsolete-variable for this case that would
>> give a warning in init.el on this variable?
>
> The doc string already does warn. The variable is not obsolete, it is
> useful for debugging the display code.
It sure would be helpful if the byte-compiler could warn about it
though. Not sure if we have the facilities for that.
> You assume people who do this read the manual...
Some kind of warning does seem to be warranted, though. The text now
seems to almost encourage users to set it:
The buffer-local variable ‘bidi-display-reordering’ controls whether
text in the buffer is reordered for display. If its value is non-‘nil’,
Emacs reorders characters that have right-to-left directionality when
they are displayed. The default value is ‘t’.
Should we just remove it from the manual, if it's only useful for
debugging? Or add a warning similar to the one in the docstring?