Call to a member function get_tax_class() on null in /class-wc-cart-totals.php
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I looked at the nginx access log and built a chain simulating a failure:
1) This request was received after emptying the woodmart quick cart (woocommerce-mini-cart) by deleting the last item:
Answer from “action=woodmart_update_cart_item”
{“fragments”:{“div.widget_shopping_cart_content”:”<div class=\”widget_shopping_cart_content\”>\n<div class=\”shopping-cart-widget-body wd-scroll\”>\n\t<div class=\”wd-scroll-content\”>\n\n\t\t\n\t\t\t<div class=\”wd-empty-mini-cart\”>\n\t\t\t\t<p class=\”woocommerce-mini-cart__empty-message empty title\”>Немає товарів у кошику.<\/p>\n\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\tПовернутися до магазину\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t<\/div>\n\n\t\t\n\t<\/div>\n<\/div>\n\n<div class=\”shopping-cart-widget-footer wd-cart-empty\”>\n\t\n\t<\/div>\n<\/div>”,”span.wd-cart-number_wd”:”\t\t<span class=\”wd-cart-number wd-tools-count\”>0 <span><\/span><\/span>\n\t\t”,”span.wd-cart-subtotal_wd”:”\t\t<span class=\”wd-cart-subtotal\”><span class=\”woocommerce-Price-amount amount\”><bdi>0,00 <span class=\”woocommerce-Price-currencySymbol\”>₴<\/span><\/bdi><\/span><\/span>\n\t\t”},”cart_hash”:””}2) Then a second GET is received with the same “item_id”, but “qty=1” and we get an error 500 which is reported in the logs (wc-status, nginx) – Thereby simulating crash for debugging purposes.
3) It seems that php does not check for a non-existent item_id with quantity – Probably here:
/web/sites/zyabkin.ua/wp-content/themes/woodmart/inc/integrations/woocommerce/modules/quantity.php
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