https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67364 --- Comment #1 from Louis Dionne <ldionne.2 at gmail dot com> --- Ping. This is one of the last bugs preventing Boost.Hana [1] to work with GCC. I would be eternally grateful if someone could fix this! [1]: https://github.com/ldionne/hana