https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107815
--- Comment #15 from Jakub Jelinek <jakub at gcc dot gnu.org> --- (In reply to dave.anglin from comment #14) > /home/dave/gnu/gcc/gcc/libstdc++-v3/testsuite/20_util/to_chars/ > float128_c++23.cc > :77: void test(std::chars_format): Assertion 'ec4 == std::errc() && ptr4 == > ptr1 > ' failed. > FAIL: 20_util/to_chars/float128_c++23.cc execution test Can you provide more info? E.g. try to run the https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107815#c5 program and attach here what it prints, uncomment the // std::cout << u << ' ' << std::string_view (str1, ptr1) << '\n'; line at least to see which test it is (if also the max() or some other one)? Thanks.