Function rustc_hir_analysis::check::upvar::restrict_repr_packed_field_ref_capture

fn restrict_repr_packed_field_ref_capture<'tcx>(
    tcx: TyCtxt<'tcx>,
    param_env: ParamEnv<'tcx>,
    place: Place<'tcx>,
    curr_borrow_kind: UpvarCapture
) -> (Place<'tcx>, UpvarCapture)

Truncate the capture so that the place being borrowed is in accordance with RFC 1240, which states that it’s unsafe to take a reference into a struct marked repr(packed).