[Fedora-i18n-bugs] [Bug 1498269] Noto Color Emoji and Noto Emoji fixed fonts cause a X error in a tcl/ tk script

https://bugzilla.redhat.com/show_bug.cgi?id=1498269

--- Comment #5 from Mike FABIAN  ---
(In reply to John L. Chmielewski from comment #2)
> Updating to the google-noto-emoji-fonts-20170928-1.fc26.noarch package fixed
> the problem of the "Noto Emoji" font causing an X error.

This font package has been split:

google-noto-emoji-fonts now contains only "Noto Emoji" (scalable black and
white font)
google-noto-emoji-color-fonts contains only "Noto Color Emoji" (Coloured bitmap
font)
> Unfortunately, if the google-noto-emoji-color-fonts-20170928-1.fc26.noarch
> package is installed not only does the "Noto Color Emoji" font cause an X
> error but the "Noto Emoji" font also causes the error again.

That is only because the default fontconfig rules enforce the use of color
emoji fonts if available, see:

/etc/fonts/conf.d/60-generic.conf which contains:

<!-- Prefer to match color emoji font. -->
    <match>
        <test name="lang">
            <string>und-zsye</string>
        </test>
        <test qual="all" name="color" compare="not_eq">
            <bool>true</bool>
        </test>
        <test qual="all" name="color" compare="not_eq">
            <bool>false</bool>
        </test>
        <edit name="color" mode="append">
            <bool>true</bool>
        </edit>
    </match>

Because of this, even if you request "Noto Emoji", what you actually get
is "Noto Color Emoji" unless this font is not installed at all.
> If the google-noto-emoji-color-fonts-20170928-1.fc26.noarch package is
> uninstalled, "Noto Emoji" will not cause an X error.

Because then there is no "Noto Color Emoji".