message: Don't expect CDPATH, it can be absent in functions
  Fix
diff: @@ -241,7 +241,7 @@ impl DirectoryStack {
  check_cdpath_first
  }
  } else {
  - unreachable!();
  + self.change_and_push_dir(dir, variables)
  }
  }
  None => self.switch_to_home_directory(variables),
  