bug#68350: Segmentation fault using list-head with negative k

[Tomas Nordin]

lloda <lloda@sarc.name> writes:

> I think this is another dupe of https://debbugs.gnu.org/58154.

Highly possible. Like Ricardo I cannot reproduce this with a local build
I made from the tip of the repo. (I saw the same segfault using list-ref
with the debian 3.0.8 version FWIW.)

--
Tomas