https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120415
--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> --- (In reply to Richard Biener from comment #2) > clang 19 says > > > clang-19 t.C -S -std=c++20 > t.C:4:11: error: no viable overloaded '-=' > 4 | __tmp -= __n > | ~~~~~ ^ ~~~ > t.C:4:17: error: expected ';' after expression > 4 | __tmp -= __n > | ^ > | ; > > so this possibly was accepts-invalid before? Comment 0 is just a tiny piece of libstdc++ code taken out of context, and so is not valid code, and is nothing to do with the bug. The error I see for the full CommandLineParser.ii file is this: src/CommandLineParser.cc:423:27: required from here src/utils/view.hh:210:15: error: no match for 'operator-' (operand types are 'const hash_set<std::pair<std::basic_string_view<char>, std::vector<std::basic_string_view<char> > >, hash_set_impl::ExtractFirst, XXHasher, std::equal_to<void> >::Iter<const hash_set<std::pair<std::basic_string_view<char>, std::vector<std::basic_string_view<char> > >, hash_set_impl::ExtractFirst, XXHasher, std::equal_to<void> >, const std::pair<std::basic_string_view<char>, std::vector<std::basic_string_view<char> > > >' and 'const hash_set<std::pair<std::basic_string_view<char>, std::vector<std::basic_string_view<char> > >, hash_set_impl::ExtractFirst, XXHasher, std::equal_to<void> >::Iter<const hash_set<std::pair<std::basic_string_view<char>, std::vector<std::basic_string_view<char> > >, hash_set_impl::ExtractFirst, XXHasher, std::equal_to<void> >, const std::pair<std::basic_string_view<char>, std::vector<std::basic_string_view<char> > > >') This is a completely different error coming from the openmsx code.
