"Unused private field" build failure(s) — clang 11.0.0

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+git347-gfc4cb6fc7+dfsg-1playlistundocommands.h:115:7: error: private field 'column_' is not used [-Werror,-Wunused-private-field] Log

1 errors