https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79442
--- Comment #1 from Ose Pedro <osemwaro.pedro at ocado dot com> --- To be more precise, it does not work under GCC 5.4.0, but does work under GCC 6.1.0. I haven't been able to find a GCC cloud service that provides 5.4.1, so haven't been able to test that version.