https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69970
--- Comment #3 from Lars Gullik Bjønnes <larsbj at gullik dot net> --- The warning might be right, but is very unhelpful. Also with gcc 5 I get no warning (and seeming working code). Note that this is reduced (and thus a bit strange) from a much larger code base.
