https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99172
--- Comment #12 from Jonathan Wakely <redi at gcc dot gnu.org> --- Comment on attachment 50360 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=50360 Proposed patch to fix issue The patch looks good but please CC the libstdc++ list for libstdc++ patches, thanks.