Array assignment to a structure's nested array

Impossible to assign an array to the nested array in the structured array. Without numba all the options below are working, but with numba only the last option works.

• The first option falls with an error “Can only insert i8 at [0] in [1024 x i8]: got i8*”.
• The second option falls with “Buffer dtype cannot be buffer, have dtype: nestedarray(uint8, (1024,))”
• The third option falls with “Buffer dtype cannot be buffer, have dtype: nestedarray(uint8, (1024,))”

import numba as nb
import numpy as np

BLOCK = np.dtype([("id", np.uint64), ("props", (np.uint8, 1024))])

@nb.njit()
def set_props1(_source, _target):
    _target[0]["props"] = _source[0]["props"]

@nb.njit()
def set_props2(_source, _target):
    _target["props"][0] = _source["props"][0]

@nb.njit()
def set_props3(_source, _target):
    for i in range(1024):
        _target["props"][0, i] = 1

@nb.njit()
def set_props4(_source, _target):
    for i in range(1024):
        _target[0]["props"][i] = 1

source = np.ones(1, dtype=BLOCK)
target = np.zeros(1, dtype=BLOCK)
set_props1(source, target)
print(target)
set_props2(source, target)
print(target)
set_props3(source, target)
print(target)
set_props4(source, target)
print(target)

[gmarkall]

Now that #7359 is merged, this is fixed. (cc @luk-f-a)

[luk-f-a]

wow, so many issues addressed by that PR