message: Replace `Vec::copy_from_slice` not implemented in rust 1.8 by another method
diff: @@ -1192,7 +1192,7 @@ impl BigUint {
  #[inline]
  pub fn assign_from_slice(&mut self, slice: &[BigDigit]) {
  self.data.resize(slice.len(), 0);
  - self.data.copy_from_slice(slice);
  + self.data.clone_from_slice(slice);
  self.normalize();
  }
  