error: mismatched closing delimiter: `}`
  --> $DIR/token-error-correct-3.rs:12:21
   |
LL |         if !is_directory(path.as_ref()) {
   |                                         - closing delimiter possibly meant for this
LL |             callback(path.as_ref();
   |                     ^ unclosed delimiter
LL |             fs::create_dir_all(path.as_ref()).map(|()| true)
LL |         } else {
   |         ^ mismatched closing delimiter

error: aborting due to previous error