https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61144
--- Comment #28 from Rich Felker <bugdal at aerifal dot cx> --- I'm quite disappointed that another release was made with this bug present. I've been trying to find a workaround, but even at -O0 the invalid constant folding optimizations are made. Is there anything I can do short of blacklisting 4.9.0 and 4.9.1 (either hard-coded or via detecting the bug)?