"No viable overloaded" build failure(s) — clang 10.0.0

PackageVersionSupposed error messageFull log Bug report
gecode 6.2.0-3./gecode/set/int/weights.hpp:127:14: error: no viable overloaded '=' Log
schroot 1.6.10-9sbuild-basic-keyfile.tcc:217:18: error: no viable overloaded '=' Log
scribus 1.5.5+dfsg-6path.h:260:11: error: no viable overloaded '=' Log 753277
xstow 1.0.2-1./leoini.h:263:9: error: no viable overloaded '=' Log

4 errors