in src/secret.rs [528:540]
fn secret_key_zeroize_on_drop() {
let secret_ptr: *const u8;
{ // scope for the secret to ensure it's been dropped
let secret = SecretKey::from_bytes(&[0x15u8; 32][..]).unwrap();
secret_ptr = secret.0.as_ptr();
}
let memory: &[u8] = unsafe { ::std::slice::from_raw_parts(secret_ptr, 32) };
assert!(!memory.contains(&0x15));
}