"Unused private field" build failure(s) — clang 10.0.0

clang -Wall -Werror will fail because bar is private (by default) and never used. g++ does not complain here.
class foo
{
    int bar;
};
PackageVersionSupposed error messageFull log Bug report
clementine 1.4.0~rc1+git174-gcb64d9705+dfsg-1playlistundocommands.h:113:7: error: private field 'column_' is not used [-Werror,-Wunused-private-field] Log

1 errors