world/kicad is linked against on non-existing libprotobuf.so.30.2.0.
I have installed world/kicad version 9.0.2-1.
Running kicad fails with kicad: error while loading shared libraries: libprotobuf.so.30.2.0: cannot open shared object file: No such file or directory
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I have on my system the file /usr/lib/libprotobuf.so.31.0.0 provided by the package world/protobuf version 31.0-2, but not /usr/lib/libprotobuf.so.30.2.0.
I just have done pacman -Syu, and the issue has already existed yesterday before I did that system update.
(Maybe you should change the depends entry protobuf to libprotobuf.so, so that it automatically gets correctly versioned on build?/ Forgotten rebuilds are easier to spot?)
Regards!