Function rustc_typeck::check::upvar::restrict_precision_for_drop_types

fn restrict_precision_for_drop_types<'a, 'tcx>(
    fcx: &'a FnCtxt<'a, 'tcx>, 
    place: Place<'tcx>, 
    curr_mode: UpvarCapture<'tcx>, 
    span: Span
) -> (Place<'tcx>, UpvarCapture<'tcx>)

Rust doesn’t permit moving fields out of a type that implements drop