https://gcc.gnu.org/bugzilla/show_bug.cgi?id=44491
--- Comment #6 from Dominique d'Humieres <dominiq at lps dot ens.fr> --- Related to pr69544. Note that compiling the test with 5.3.0 or trunk (6.0) gives now an ICE, r218570 gives the error and r218658 gives the ICE.