message: Derive Debug for ErrorFrame and ErrorStack
diff: @@ -17,7 +17,7 @@ use hdf5_sys::h5e::{
  use crate::internal_prelude::*;
  -#[derive(Clone)]
  +#[derive(Clone, Debug)]
  pub struct ErrorFrame {
  desc: String,
  func: String,
  @@ -103,7 +103,7 @@ pub fn silence_errors() -> SilenceErrors {
  SilenceErrors::new()
  }
  -#[derive(Clone)]
  +#[derive(Clone, Debug)]
  pub struct ErrorStack {
  frames: Vec<ErrorFrame>,
  description: Option<String>,
  