Unused private field - Rebuild of the Debian archive with clang

"Unused private field" build failure(s)
clang 8.0.1

clang -Wall -Werror will fail because bar is private (by default) and never used. g++ does not complain here.

class foo
{
    int bar;
};

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
olive-editor	20200210-1	stream.h:41:7: error: private field 'stream_index_' is not used [-Werror,-Wunused-private-field]	Log
openzwave	1.5+ds-6	ValueList.h:85:11: error: private field 'm_newValueIdx' is not used [-Werror,-Wunused-private-field]	Log

2 errors

Debian Package rebuild