I check in all my config files with RCS before editing them. I recently added a line to /etc/modprobe.d/backlist, and hence created /etc/modprobe.d/RCS and /etc/modprobe.d/RCS/blacklist,v. Modprobe tried to read the latter and obviously got all confused. This is wrong behavior. Various other tools which have ".d" folders are smart enough not to read RCS files checked in underneath them. Whatever logic those tools use, modprobe needs to use as well.
This would be a somewhat significant divergence from the upstream module-init-tools code, and therefore, it's unlikely that we'd do work to specifically add this support. Reporting this to the upstream maintainers might be more effective.
CLOSED/UPSTREAM used to mean that Red Hat had reported the bug upstream, or at least that what I thought it meant. I've seen it used recently to mean "YOU should report the bug upstream." When did this change (or did it change)? "rpm -qi module-init-tools" doesn't list an author or a URL for where this package comes from, so who do I report it to?
The AUTHORS file in the source tarball lists: Rusty Russell <rusty.au> Adam J. Richter <adam> I've sent this issue to them by e-mail, along with a query as to whether there's a better mechanism for this.