What happened: Calling full with an integer fill value and dtype=None returns a float array rather than an int array, which is what happens in NumPy.

What you expected to happen: Behaviour the same as NumPy.

Minimal Complete Verifiable Example:

>>> import numpy as np
>>> np.full(1, 0, dtype=None).dtype
dtype('int64')
>>> import dask.array as da
>>> da.full(1, 0, dtype=None).dtype
dtype('float64')

Anything else we need to know?:

Environment:

• Dask version: main
• Python version: 3.8
• Operating System: mac
• Install method (conda, pip, source): source