Numba cache error

app.py

import numpy as np
import numba as nb

import lib1


@nb.jit(nopython=True)
def fcalc(x):
    s = lib1.func(x)
    return s * 0.5 - 1.0


def run(N):
    x = np.linspace(-1.0, 1.0, N)
    res = fcalc(x)

    print res

if __name__ == '__main__':
    N = 1000
    run(N)

lib1.py

import numba as nb

@nb.jit(nopython=True, cache=True)
def func(y):
    s = 0.0

    for k in range(y.shape[0]):
        s += y[k]

    return s