roll division by zero error #8914
Description
What happened: roll gives a division by zero error when NumPy returns an empty array on the same input.
What you expected to happen: Behaviour the same as NumPy.
Minimal Complete Verifiable Example:
>>> import numpy as np
>>> np.roll(np.zeros(0), 0)
array([], dtype=float64)
>>> import dask.array as da
>>> da.roll(da.zeros(0), 0)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/Users/tom/projects-workspace/dask/dask/array/routines.py", line 1874, in roll
s %= result.shape[i]
ZeroDivisionError: integer division or modulo by zeroAnything else we need to know?:
Environment:
- Dask version: main
- Python version: 3.8
- Operating System: mac
- Install method (conda, pip, source): source