Numba function with LLVM IR parsing error

gistfile1.py

@jit("float64[:], float64[:], float64[:], int64, float64, float64, float64[:]", nopython=True)
def cable_cost_function(angles, x1, x2, n, D2, a, memo):
    t1 = angles[:n]
    t2 = angles[n:]
    cost = 0.
    for i in range(n):
        s1 = np.sin(t1[i])
        c1 = np.cos(t1[i])
        s2 = np.sin(t2[i])
        c2 = np.cos(t2[i])
        x_err = (D2*s1+(x1[i]-D2*t1[i])*c1 - a + D2*s2 + (x2[i]-D2*t2[i])*c2)
        y_err = (-1.*D2*c1+(x1[i]-D2*t1[i])*s1 + D2*c2 - (x2[i]-D2*t2[i])*s2)

        cost += x_err*x_err+y_err*y_err

        dx_err1 = -1.*(x1[i]-1.*D2*t1[i])*s1
        dx_err2 = -1.*(x2[i]-1.*D2*t2[i])*s2

        dy_err1 = (x1[i]-1.*D2*t1[i])*c1
        dy_err2 = -1.*(x2[i]-1.*D2*t2[i])*c2

        memo[i] = 2.*x_err*dx_err1+2.*y_err*dy_err1
        memo[i+n] = 2.*x_err*dx_err2+2.*y_err*dy_err2

    return cost, memo