I opened a bug on this here:

https://bugzilla.redhat.com/show_bug.cgi?id=1411037

I received an update to the weather-widget and am getting this error now when

I try to rebuild:

FAILED: ? tag-invalid : <icon> not allowed in appdata ? tag-invalid : stock icon is not valid [weather-widget] Validation of files failed

My understanding was that the desktop entry spec file was used to generate the desktop and xml files. Both are generated to include the icon tag - but now according to appstream-util this isn't allowed in the xml file any longer. I checked in /usr/share/appdata and did a random check on org.kde.plasma.colorpicker.appdata.xml among others and they also have the <icon> tag and also now fail.

I also looked here:https://www.freedesktop.org/software/appstream/docs https://www.freedesktop.org/software/appstream/docs/chap-CollectionData.html#sect-AppStream-XML

and it appears that the <icon> tag is valid./chap-CollectionData.html#sect-AppStream-XML https://www.freedesktop.org/software/appstream/docs/chap-CollectionData.html#sect-AppStream-XML

So it appears that we have an error in either the process which is autogenerating the appdata file or the validation program has a bug.

I can certainly hack around this, but would prefer not.