Can someone explain to me how `Box::from_raw` and `Box::into_raw` are able to work with unsized types? Aren't we 100% for sure loosing the size/vtable? /cc @Gankro
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Not being able to cast from a slice to a c-array would kinda blow? Box<[T]> barely exists so not much thought is put into it.
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doesn't work on *const [T] yo
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ptr.as_ref().map(|s| s.as_ptr()).unwrap_or_else(ptr::null)
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