When building ktp-accounts-kcm,QDBusArgument is not found. Rebuilding qtdbus does not solve the issue. Bug #701096 fails with a similar error.
Created attachment 597578 [details] Build log
Created attachment 597580 [details] emerge --info
> Timestamp of repository gentoo: Sat, 23 Nov 2019 21:00:01 +0000 Fixed at the same time as bug 701096. Please sync your portage copy. *** This bug has been marked as a duplicate of bug 701096 ***