message: Use correct alignment
diff: @@ -514,7 +514,7 @@ impl<'a, 'tcx> EvalContextExt<'tcx> for EvalContext<'a, 'tcx, super::Evaluator>
  let (_, align) = self.size_and_align_of_dst(ty, args[0].value)?;
  self.write_primval(
  dest,
  - PrimVal::from_u128(align.pref() as u128),
  + PrimVal::from_u128(align.abi() as u128),
  dest_layout.ty,
  )?;
  }
  