[Bug c++/89766] [8 Regression] ICE: canonical types differ for identical types, -std=c++17

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89766

--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
@RJ: Btw. do you see the ICE also for a valid C++ code? The test-case you
provided isn't valid if I'm correct?