https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79771
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> --- There is https://github.com/madler/zlib/commit/b4ce6caf0992296230e4e25b22a63e418bdf4dcf but not enough further info why it has changed. So, report upstream?
