Multiplication with Matrix{Sym} gives Matrix{Any}

[olof3]

A = fill(Sym("a"), 2, 2)
A*A # is of type Matrix{Any}
A*ones(2,2) # is of type Matrix{Any}
A*Diagonal([1,1]) # is of type Matrix{Any}
A*I(2) # gives an error

I've only investigated this for a little bit, but I don't think that I'll be able to resolve this in a good way myself.

If A is instead of the type Matrix{Basic} (from the SymEngine package) the first three multiplications return the expected type, while the last one fails.