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 249933 [details]
Created attachment 258374 [details, diff]
With the 0.12.5 version bump I apply the attached patch. Hopefully that should fix the bug.
(In reply to comment #2)
> Created an attachment (id=258374) [details]
> With the 0.12.5 version bump I apply the attached patch. Hopefully that should
> fix the bug.
Upstream has been notified in private mail.