[issue41223] `object`-backed `memoryview`'s `tolist` errors

[Dennis Sweeney]

Dennis Sweeney <sweeney.dennis650 at gmail.com> added the comment:

Can you describe your use-case more? In particular, why use memoryview(a).tolist() instead of a.tolist()? Or some other numpy operations like a.flat or a.view()? Or even numpy.array(memoryview(a)) to recover a numpy array from a memoryview?

If this were implemented and stdlib memoryview objects supported some kind of object 'O' format, would list(memoryview(b"\0\0\0\0\0\0\0\0").cast('O')) dereference a null pointer and segfault?

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components: +Interpreter Core
nosy: +Dennis Sweeney
type:  -> enhancement
versions:  -Python 3.10, Python 3.6, Python 3.7, Python 3.8, Python 3.9

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