https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79482
--- Comment #4 from Remy NOEL <mocramis at gmail dot com> --- Ha indeed, my bad. I was confused by the fact that he original problem of the linked ticket is solved (and also because the last comment targets the fix for an old release which made me though it was either solved or forgotten). If it is not worth keeping this ticket open, i'll close it. (though the failing example is much more simple).
