appdata test fails due to missing ProxyResolver

[CodedOre]

During my work on using Flatpak Builder in my project (see CodedOre/NewCaw#46), I ran into the problem that the appdata test fails as appstream_util fails to assert Gio. ProxyResolver:

(appstream-util:12): GLib-GIO-CRITICAL **: 10:28:50.002: g_proxy_resolver_lookup: assertion 'G_IS_PROXY_RESOLVER (resolver)' failed

I have also seen that the CI builds of Dialect also fail due to the exact same issue, so I assume the issue is with the Flatpak Builder action.

Used image: gnome-nightly

Link to the failed build
The workflow file

[mcatanzaro]

See: hughsie/appstream-glib#449

[bilelmoussaoui]

Closing as unrelated to the action itself, thanks @mcatanzaro for the investigation!