[Bug other/80678] g++.dg/cpp1y/constexpr-79681-2.C fails with ICE starting with r247678

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80678

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Also, note the testcase has been ICEing even with older 6.x branch snapshots,
it is just that the testcase has been newly added.