https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89785
Jakub Jelinek <jakub at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |jakub at gcc dot gnu.org, | |jason at gcc dot gnu.org, | |redi at gcc dot gnu.org --- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> --- I guess that is because potential_constant_expression_1 punts on THROW_EXPR. There is some code to not recurse if e.g. IF_STMT or COND_EXPR condition evaluates to constant zero or nonzero, but that is not the case here. I actually don't know what in the standard requires something like potential_constant_expression{,_1} rather than just punting during constexpr evaluation if some non-constexpr construct is encountered. For the cases listed in dcl.constexpr which may not show up in constexpr functions I thought that is covered in the parser already.