https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70126
--- Comment #1 from Florian Weimer <fw at gcc dot gnu.org> --- There seems to be a fundamental incompatibility here with supporting the GNU CC VLA extension and this new (and apparently dead) C++ VLA specification. I wonder how much existing G++ code applies sizeof to a VLA type (as opposed to a VLA object, which seems to be allowed under the C++ proposal).