https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81712
--- Comment #8 from Mikael Pettersson <mikpelinux at gmail dot com> --- The fix was backported to gcc-6-branch in r249957 and to gcc-5-branch in r249958. So it's included in gcc-5.5.0 and will be included in gcc-6.5.0.