Running out of RAM with repeated cholesky solves

I think this is a memory leak here.
The relevant code snippet:

        Y_Handle = Ptr{cholmod_dense_struct}(C_NULL)
[...]
        status = GC.@preserve x dense_x b dense_b begin
            $(cholname(:solve2, TI))(
                CHOLMOD_A, L,
                Ref(dense_b), C_NULL,
                Ref(X_Handle), C_NULL,
                Ref(Y_Handle),
                Ref(E_Handle),
                getcommon($TI))
        end
        if Y_Handle != C_NULL
            free!(Y_Handle)
        end

It works that way in C, but not in julia. It must be Y_Handle = Ref(C_NULL), and then if Y_Handle[] != C_NULL .....

PS CHOLMOD allocations · Issue #726 · JuliaSparse/SparseArrays.jl · GitHub