def mutate_array(self, arr):
        try:
            arr.fill(42)
        except (__HOLE__, ValueError):
            # Try something else (e.g. Numpy 1.6 with structured dtypes)
            fill_value = b'x' * arr.dtype.itemsize
            arr.fill(fill_value)
dataset/ETHPy150Open numba/numba/numba/tests/test_dyn_array.py/ConstructorLikeBaseTest.mutate_array