https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94490
Marek Polacek <mpolacek at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |mpolacek at gcc dot gnu.org --- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> --- In expand_integer_pack tsubst_copy_and_build produces *(0 ? tuple_size_v : tuple_size_v) and cxx_constant_value complains, because we turn tuple_size_v into '2' and so we're dereferencing an INTEGER_CST.