https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67282
--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> --- I can reproduce this one with: Using built-in specs. COLLECT_GCC=./xgcc Target: x86_64-unknown-linux-gnu Configured with: /home/marek/src/gcc/configure --enable-languages=c,c++ --enable-checking=yes -with-system-zlib --disable-bootstrap --disable-libvtv --disable-libcilkrts --disable-libitm --disable-libgomp --disable-libcc1 --disable-libstdcxx-pch --disable-libssp --enable-isl Thread model: posix gcc version 5.3.1 20160202 (GCC) But not anymore with 6.
