https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102048
--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> --- (In reply to Jonathan Wakely from comment #4) > That function was not part of the SGI rope so I think we should just remove > it: > https://www.boost.org/sgi/stl/Rope.html Correction: it's present in the <stl_rope.h> header, but not documented in the API reference. So I still think its existence is a mistake, but a mistake that started with the original implementation.