ark_ff_bigint_bug.rs

use ark_ff::BigInt;
    
let (mut a, ptr) = {
    let b = BigInt::<4>::new([12, 34, 56, 78]);
    println!("Creation Address: {:?}", b.0.as_ptr());

    (b, b.0.as_ptr())
};

println!("Value before dropping: {:?}", a);

let addr_a = a.0.as_ptr();

println!("Returned Address: {:?}", addr_a);

a.zeroize();

println!("{:?}", a);
      
let val_at_returned_memory = unsafe { core::slice::from_raw_parts(addr_a, 4) };
println!("Value at Returned Address: {:?}", val_at_returned_memory); // Zeroed

let val_at_dropped_memory = unsafe { core::slice::from_raw_parts(ptr, 4) };

println!("Value at Creation Address: {:?}", val_at_dropped_memory); // value still in original memory