> There is no occurrence of ‘CCHAR’ or ‘UNUMBER’ in the source, so I > suspect this might be orthogonal to src:cryptsetup.
You're right I'm not sure what's going on. I allowed the packages to update again and now there's no error, it just seems to have gone away on its own. I really hate when that happens. I'll open another bug report with no specific package if I see the error again. Sorry for the false report.