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Re: Crash in 2.25.4

From: Werner LEMBERG
Subject: Re: Crash in 2.25.4
Date: Mon, 22 May 2023 08:07:08 +0000 (UTC)


>> <snipped>All this comes about as I'm thinking of getting back to
>> some documentation work, and wanted to compile docs locally. I'll
>> still keep that goal in mind.
>> If you can still reproduce the problem after this cleaning, could
>> you run
>> ```
>> FC_DEBUG=2025 build/out/bin/lilypond --verbose --ps test_file.ly >
>> fclog.log 2> lilylog.log
>> ```
>> and send the three resulting files, `test_file.ps`, `fclog.log` and
>> `lilylog.log`?
> The requested files are attached as an archive, as two of them are
> rather large.

(1) You have the font 'Noto Color Emoji' installed on your system (the
    new one, with scalable glyphs using the 'COLR' v1 format).  Say
    `fc-list | less` to find out where it is located.  This font
    format is not supported by GhostScript – such a font cannot be
    meaningfully embedded in a PS or PDF file.

(2) For some reason, the digits in the tagline string are taken from
    `Noto Color Emoji` instead of `C059-Roman`, which is used for
    everything else in the tagline (see the end of your
    `Non-Musical.ps` file).

I think item (1) happens because 'Noto Color Emoji' is set up as a
fallback font on your OS.

Regarding (2) I'm not sure where exactly the problem lies (i.e.,
whether it is a LilyPond or a Pango issue).  However, if you use the
current LilyPond developer version, this should be fixed: LilyPond and
Pango no longer use glyph names but glyph indices for communication.

BTW: Have you checked whether the Cairo backend works for you?

lilypond -dbackend=cairo ...

Perhaps we should disable color fonts similarly to variation fonts, at
least for now (and later on for the PS backend only).  Such a change
could be backported to the 2.24 series.


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