[Bug c++/128386] `template for` over range of reflections promotes constexpr function to immediate when built with ubsan

[ivan.lazaric.gcc at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=128386

--- Comment #1 from Ivan Lazaric <ivan.lazaric.gcc at gmail dot com> ---
I think this regressed with commit 127bd0f40827d7472cebacd2093d3379ec25dbd7.