[Bug c++/127640] ICE in contains_polymorphic_type_p with C++26 template for and coroutines under -O2

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=127640

--- Comment #1 from Drea Pinski <pinskia at gcc dot gnu.org> ---
                <<< error >>> c [value-expr: <<< error >>>];