error[E0027]: pattern does not mention fields `lineno`, `content`
   --> src/display_list.rs:139:32
    |
139 |                           if let DisplayLine::Source {
    |  ________________________________^
140 | |                             ref mut inline_marks,
141 | |                         } = body[body_idx]
    | |_________________________^ missing fields `lineno`, `content`
    |