Size mismatch in equation

[Willi Braun]

is this wanted:

{{{function foo

input Real x[:];
output Real y[size(x,1)];

algorithm

y:=x*2;

end foo;
model ArrayEqn1

Real x[1];
Real y(start=1);

equation

der(y)=-4*y;
x=foo({y,2.,1.});

end ArrayEqn1;}}}

Should this really work, because we test this in ArrayEquation.mos.   With the old simulation runtime it's even simulate.
Actually, it should not possible to check this model, because of Size mismatch.