https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92654
--- Comment #9 from fiesh at zefix dot tv --- (In reply to Martin Liška from comment #8) > Ok, GCC newly received a support for __has_builtin, so one needs to > '#define a 0' always. > The ICE started with r259043, before that the code was rejected. Or I guess just change it to `#ifdef __clang__`.