https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107161
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> --- GCC relies on 'p' being in .rodata for the folding which of course cannot be the case with a mutable member. Note the frontend clears the 'const' from the declaration because of the mutable member and we have no way to distinguish constant from non-constant members here. Do constexpr/consteval work in such circumstances?
