[BUG] Unreachable condition in interprtation of `SET_FUNCTION_ATTRIBUTE` on Python 3.14

[gmarkall]

Reported by @shwina

Minimal reproducer:

import numpy as np
import numba.cuda

def outer(idx: np.int64) -> np.uint8:
    def inner(x: np.int64) -> np.uint8:   # ← nested fn with annotations
        return np.uint8(x % 5)
    return inner(idx)

sig = numba.types.uint8(numba.types.int64)
numba.cuda.compile(outer, sig=sig, output="ltoir")

This seems to have something to do with a nested function with annotations.

[acosmicflamingo]

Looks like this issue came up on upstream side a few months ago (numba/numba#10319) and was addressed accordingly: numba/numba#10321.

Is there a formal process for syncing numba-cuda with upstream version? I could make a PR that cherry-picks the changes if you'd like.

[gmarkall]

I could make a PR that cherry-picks the changes if you'd like.

That would be great - many thanks!

[acosmicflamingo]

@gmarkall Here you go! #886