https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116440
--- Comment #1 from tianchengyu(余添诚) <tianchengyu at tencent dot com> --- Note that in the sample I used static_assert(std::is_copy_constructible<...>) for testing, but it is not that is_copy_constructible is false. The std::tuple<std::tuple<std::any>>> type simply does not compile at all. Unsure if this is a c++ frontend issue or a libstdc++ issue.