unsoundness in code

[Dylan-DPC-zz]

Hi I found this via a crater run. This crate uses std::mem::unitialized which is both deprecated and unsound. You can refer the linked advisory to know more

[RalfJung]

Specifically, the bug is here:

rust-littlefs/littlefs/src/lib.rs

Line 288 in 5634f08

lfs: unsafe { mem::uninitialized::<lfs::lfs>() },

the type instantiated there may not be left uninitialized. rust-lang/rust#71274 will detect this and turn it into a panic.