Traceback (most recent call last):


 "<stdin>", line 1, in <module>


 "/Users/tos/GitHub/chainer/chainerx/_fallback_workarounds.py", line 134, in __setitem__

if cupy is not None and isinstance(self, cupy.ndarray):
AttributeError: module 'cupy' has no attribute 'ndarray'

Traceback (most recent call last):


 "<stdin>", line 1, in <module>
AttributeError: type object 'C' has no attribute 'x'
