Unsound usages of unsafe implementation Vec<u32> from to u8

[llooFlashooll]

Hi, I am scanning the base-x in the latest version with my own static analyzer tool.

Unsafe conversion found at: src/bigint.rs:115:30: 115:65.

let mut bytes = Vec::with_capacity(len);
unsafe {
    bytes.set_len(len);

    let chunks_ptr = (self.chunks.as_ptr() as *const u8).offset(skip as isize);

    ptr::copy_nonoverlapping(chunks_ptr, bytes.as_mut_ptr(), len);

}

This unsound implementation would create a misalignment issues from different integers.

The problematic value is further manipulated at: src/bigint.rs:115:30: 115:87

This would potentially cause undefined behaviors in Rust. If we further manipulate the problematic converted types, it would potentially lead to different consequences. I am reporting this issue for your attention.