message: revert and assert precondition for -C flag
diff: @@ -28,6 +28,8 @@ pub fn main(config: &mut LazyConfig) -> CliResult {
  let args = cli().try_get_matches()?;
  // Update the process-level notion of cwd
  + // This must be completed before config is initialized
  + assert_eq!(config.is_init(), false);
  if let Some(new_cwd) = args.get_one::<std::path::PathBuf>("directory") {
  std::env::set_current_dir(&new_cwd).context("could not change to requested directory")?;
  }
  @@ -510,6 +512,13 @@ impl LazyConfig {
  Self { config: None }
  }
  + /// Check whether the config is loaded
  + ///
  + /// This is useful for asserts in case the environment needs to be setup before loading
  + pub fn is_init(&self) -> bool {
  + self.config.is_some()
  + }
  +
  /// Get the config, loading it if needed
  ///
  /// On error, the process is terminated
  