Antoine Pitrou <report@bugs.python.org> wrote:
> That's rather funky. What should the right result be?

Basically [5, 4, 3, 2, 1] as bytes:

'\x05\x04\x03\x02\x01'

Looks like an off-by-one error.

I was a bit surprised that tobytes() automatically converts anything
to a C-contiguous array. The result can be completely disconnected
from the raw memory.

[The bug also exists for forward strides.]

array([1, 3, 5], dtype=uint64)
>>> m = memoryview(y)
>>> m.tobytes()
'\x03\x00\x00\x00\x00\x00\x00\x00\x05\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00'
>>>