Font-awesome: wrong icon for fa-flickr

[sal0max]

I'm testing grav (v1.6.26) with the quark theme (v2.0.3) since yesterday.
I tried to build a footer like on my old wordpress website: Some internal and external links.

I want to use the font-awesome icons for Instagram, Flickr, Github and RSS.
When using fa-flickr, an icon similar to cart-plus appears, instead of flickr:

<section id="footer" class="section bg-gray">
    <section class="container grid-lg">
        <p>
            <a href="#">Impressum</a>
            <a href="#"><i class="fa fa-instagram fa-lg"></i></a>
            <a href="#"><i class="fa fa-flickr fa-lg"></i></a>
            <a href="#"><i class="fa fa-github fa-lg"></i></a>
            <a href="#"><i class="fa fa-rss fa-lg"></i></a>
            <a href="#">Datenschutz</a>
        </p>
    </section>
</section>

What could be the reason for this?

[sal0max]

Alright, I dug a bit into the issue myself.

Seems quark isn't using Font Awesome, but a fork of Line Awesome. I downloaded fonts/line-awesome.ttf from this repo and also the current line-awesome font from https://icons8.com/line-awesome and installed both on my system.

flickr has the hex code . I used that hex code inside TextEdit with line-awesome.ttf from this repo and with la-brands-400.ttf from the official download. Here's the result:

So, it seems the fork of line-awesome which is included with quark, is faulty. Can someone fix that, please?
I'm not familiar, how the line-awesome font was put together, from the different offical fonts.

[NicoHood]

@sal0max I just looked at the line awesome/font awesome thing. It seems that quark is not using an old version (fontawesome 4x. compatible), it also uses some non standard fork.

I guess the best way would to upgrade quark to line awesome 1.3.0 which is compatible with fontawesome 5.x. But that requires a few changes and will be a breaking change.

[NicoHood]

I've added full line-awesome 1.3.0 support (with font-awesome 4&5 compatibility!!!) here (and other changes): https://github.com/NicoHood/grav-theme-quark/tree/magerquark