[Bug c++/84139] C++17 Filesystem/Filesystem TS + cmcstl2 = GCC ICE

[cjdb.ns at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84139

--- Comment #2 from Christopher Di Bella <cjdb.ns at gmail dot com> ---
An observation by Casey Carter (maintainer for cmcstl2) was made over at
cpplang.slack.org#concepts:

> Presumably a concepts bug being triggered in the `std::iterator_traits`-hooking code at https://github.com/CaseyCarter/cmcstl2/blob/master/include/stl2/detail/iterator/concepts.hpp#L781