[Bug c++/67650] undef reference with -fdevirtualize

[vincent.lextrait at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67650

--- Comment #5 from Vincent <vincent.lextrait at gmail dot com> ---
The problem is static time, not dynamic time.
This artefact is just a result of source code reduction. In  my code there is
no "0", and the problem exists.
I can provide an alternative case without this artefact, but I do not believe
it harms investigations at all.