https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61281
--- Comment #6 from Dominique d'Humieres <dominiq at lps dot ens.fr> --- > I can confirm the misbehavior with 4.9.1, but it seems that the problem > is gone on current trunk: Confirmed. Likely fixed by r 216427 (pr63553).