message: fix dumping uninitialized locals
diff: @@ -264,9 +264,7 @@ pub fn eval_main<'a, 'tcx: 'a>(
  trace!("Frame {}", i);
  trace!(" return: {:#?}", frame.return_place);
  for (i, local) in frame.locals.iter().enumerate() {
  - if let Ok(local) = local.access() {
  - trace!(" local {}: {:?}", i, local);
  - }
  + trace!(" local {}: {:?}", i, local.value);
  }
  }
  }
  