Obviously incorrect C++ code was accepted by cl.exe compiler -

Obviously incorrect C++ code was accepted by cl.exe compiler -

i wonder why next c++ code accepted microsoft cl.exe compiler visual studio 2012?

int x; struct {} decltype(x) y;

it looks obvious mistake, code above compilable. note, however, next code correctly rejected:

int x; struct {} int y;

because there bug. raise on microsoft connect , move on else!

c++ cl