Cannot pass non-trivial object of type 'xx' to variadic function - Rebuild of the Debian archive with clang

"Cannot pass non-trivial object of type 'xx' to variadic function" build failure(s)
clang 6.0

Versions: 2.9 - 3.0 - 3.1 - 3.2 - 3.3 - 3.4 - 3.4.2 - 3.5.0 - 3.6.0 - 3.8.1 - 3.9.1 - 4.0.1 - 5.0 - 6.0 - 8.0.1 - 9.0.1 - 10.0.0 - 11.0.0 - 12.0.1 - 13.0.0

Package	Version	Supposed error message	Full log	Bug report
packagesearch	2.7.8	main.cpp:45:30: error: cannot pass non-trivial object of type 'const QString' to variadic function; expected type from format string was 'char *' [-Wnon-pod-varargs]	Log
traverso	0.49.5-2	Tsar.cpp:280:105: error: cannot pass non-trivial object of type 'QByteArray' to variadic method; expected type from format string was 'char *' [-Wnon-pod-varargs]	Log

2 errors

Debian Package rebuild