message: Use Pointer::dangling for ZST's in trans_const_value
diff: @@ -164,7 +164,7 @@ pub(crate) fn trans_const_value<'tcx>(
  if layout.is_zst() {
  return CValue::by_ref(
  - crate::Pointer::const_addr(fx, i64::try_from(layout.align.pref.bytes()).unwrap()),
  + crate::Pointer::dangling(layout.align.pref),
  layout,
  );
  }
  