matrix() operator gives error in frontend

[Bruno Scaglioni]

instantiating the model:

model testEq
parameter Integer M=5;
parameter Real a[M]=zeros(M);
Real b[M,1];
equation 
    b = matrix(a);
end testEq;

gives error during flattening:

Type mismatch in equation {{b[1,1]}, {b[2,1]}, {b[3,1]}, {b[4,1]}, {b[5,1]}}={{a[1]}, {a[2]}, {a[3]}, {a[4]}, {a[5]}} of type Real[5, 1]=Real[5, 1]