message: Fix for mutable_borrow_reservation_conflict future compatibility lint
diff: @@ -692,8 +692,8 @@ pub fn codegen_call_inner<'a, 'tcx: 'a>(
  PassMode::NoPass => {}
  PassMode::ByVal(_) => {
  if let Some(ret_place) = ret_place {
  - let results = fx.bcx.inst_results(call_inst);
  - ret_place.write_cvalue(fx, CValue::ByVal(results[0], ret_layout));
  + let ret_val = fx.bcx.inst_results(call_inst)[0];
  + ret_place.write_cvalue(fx, CValue::ByVal(ret_val, ret_layout));
  }
  }
  PassMode::ByRef => {}
  