AddToCartEvent WSOD for order items with no price

This is the related code:

public function getData(): array {
    // @todo leverage config for token replacement.
    $order_item = $this->getContextValue('item');
    assert($order_item instanceof OrderItemInterface);
    $unit_price = $order_item->getUnitPrice();
    assert($unit_price !== NULL);
    $adjusted_price = $order_item->getAdjustedUnitPrice();
    assert($adjusted_price !== NULL);

    $item_data = [
      'item_name' => $order_item->label(),
      'affiliation' => $order_item->getOrder()->getStore()->label(),
      'discount' => $unit_price->subtract($adjusted_price)->getNumber(),
      'price' => $this->formatPriceNumber($unit_price),
      'quantity' => (int) $order_item->getQuantity(),
    ];

assert($unit_price !== NULL); safes us in dev, but not in prod, I guess?

We maybe this needs more defensive checking also for production?
This is major for Drupal Commerce projects.

Maybe something like this? (See MR)

🐛 Call to a member function getCurrencyCode() on null Active should also be applied (and merged before this one).