WooCommerce Analytics: check if product exists before we use it (#35566)

Fixes #35562

Author: jeherve

projects/plugins/jetpack/changelog/fix-wc-product-fatal

@@ -0,0 +1,4 @@
+Significance: patch
+Type: bugfix
+
+WooCommerce Analytics: avoid error when trying to pay for a deleted product.

projects/plugins/jetpack/modules/woocommerce-analytics/classes/class-jetpack-woocommerce-analytics-trait.php

@@ -68,7 +68,13 @@ protected function format_items_to_json( $items ) {
 			} else {
 				$product = $item['data'];
 			}
+
+			if ( ! $product || ! $product instanceof WC_Product ) {
+				continue;
+			}
+
 			$data = $this->get_product_details( $product );
+
 			if ( $item instanceof WC_Order_Item_Product ) {
 				$data['pq'] = $item->get_quantity();
 			} else {