- Attach context to help the person troubleshooting the error understand where
  things went wrong. A low-level error like "No such file or directory" can be
  annoying to debug without more context about what higher level step the
  application was in the middle of.

- Wrap a lower level error with a new error created from a message to help the
  person troubleshooting understand what the chain of failures that occured. A
  low-level error like "No such file or directory" can be annoying to debug
  without more information about what higher level step the application was in
  the middle of.

      it.detach().context("Failed to detach the important thing")?;

      it.detach().wrap_err("Failed to detach the important thing")?;

          .with_context(|| format!("Failed to read instrs from {}", path))?;

          .wrap_err_with(|| format!("Failed to read instrs from {}", path))?;