[Bug c++/106434] [12/13 Regression] Spurious -Wnull-dereference when using std::unique_copy() since r12-5187-g1ae8edf5f73ca5c3

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106434

--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
It looks like 129t.thread1 jump threaded things in a way to expose this case
(which is probably unreachable, but ...).