You're receiving this bug because the package in Summary has produced _FORTIFY_SOURCE related warnings indicating the presence of a sure overflow in a static buffer.
Even though this is not always an indication of a security problem it might even be. So please check this out ASAP.
By the way, _FORTIFY_SOURCE is disabled when you disable optimisation, so don't try finding out the cause using -O0.
Your friendly neighborhood tinderboxer
Created attachment 250563 [details]
Right. tlf contains a lot of buffer overruns. I am working with upstream for some time to fix it. I think the new tlf-1.0.0 will be ready in next weeks.
After that I will take over maintainership of the package.
+*tlf-1.0.0 (25 Dec 2010)
+ 25 Dec 2010; Thomas Beierlein <firstname.lastname@example.org> +tlf-1.0.0.ebuild,
+ Version bump. Took over maintainership.