[Bug c++/121798] ICE on self-referential constraint

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121798

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Created attachment 62307
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=62307&action=edit
Simplified testcase