https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64791
--- Comment #8 from Paolo Carlini <paolo.carlini at oracle dot com> --- Weird, I tried on my machine yesterday's r220267 and same result, no warning (with -std=gnu++1z -Wall -Wextra). I guess that before closing this bug we need either to figure out what's special about that web page or another report that things are actually fine.
