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 249867 [details]
Looks like this could be bumped to 0.64.4, maybe it could help ::-/
I have tried to bump it without success because I couldn't apply https://ssl.drqueue.org/redmine/issues/142#change-474 for some reason :/
(In reply to comment #2)
> Looks like this could be bumped to 0.64.4, maybe it could help ::-/
Bumped to 0.64.4 now. I have not taken a closer look at the overflows, yet.