https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94829
--- Comment #2 from Iain Sandoe <iains at gcc dot gnu.org> --- patch posted here: https://gcc.gnu.org/pipermail/gcc-patches/2020-April/544843.html we are very close to branching for 10, so not sure if this will be included in 10.1
