Fatal error when try to create an order using API REST where include a coupon code with email restrictions.

[crodriguezbrito]

Prerequisites

• I have carried out troubleshooting steps and I believe I have found a bug.
• I have searched for similar bugs in both open and closed issues and cannot find a duplicate.

Describe the bug

A fatal error is generated when you try to create an order using the WooCommerce API Rest and this order include a coupon code with "Allowed email" restrictions.

Expected behavior

The expected behaviour should an order created with the coupon code associated.

Actual behavior

The following fatal error appear:

PHP Fatal error: Uncaught Error: Call to a member function is_coupon_emails_allowed() on null in /Users/carlosrodriguez/Local Sites/debug/app/public/wp-content/plugins/woocommerce/includes/class-wc-discounts.php:979
Stack trace:
#0 /Users/carlosrodriguez/Local Sites/debug/app/public/wp-content/plugins/woocommerce/includes/class-wc-discounts.php(1046): WC_Discounts->validate_coupon_allowed_emails(Object(WC_Coupon))
#1 /Users/carlosrodriguez/Local Sites/debug/app/public/wp-content/plugins/woocommerce/includes/rest-api/Controllers/Version3/class-wc-rest-orders-controller.php(73): WC_Discounts->is_coupon_valid(Object(WC_Coupon))
#2 /Users/carlosrodriguez/Local Sites/debug/app/public/wp-content/plugins/woocommerce/includes/rest-api/Controllers/Version3/class-wc-rest-orders-controller.php(218): WC_REST_Orders_Controller->calculate_coupons(Object(WP_REST_Request), Object(WC_Order))
#3 /Users/carlosrodriguez/Local Sites/debug/app/public/wp-content/plugins/woocommerce/includes/rest-api/Controllers/Version3/class-wc-rest-crud-controller.php(191): WC_REST_Orders_Controller->save_object(Object(WP_REST_Request), true)
#4 /Users/carlosrodriguez/Local Sites/debug/app/public/wp-includes/rest-api/class-wp-rest-server.php(1230): WC_REST_CRUD_Controller->create_item(Object(WP_REST_Request))
#5 /Users/carlosrodriguez/Local Sites/debug/app/public/wp-includes/rest-api/class-wp-rest-server.php(1063): WP_REST_Server->respond_to_request(Object(WP_REST_Request), '/wc/v3/orders', Array, NULL)
#6 /Users/carlosrodriguez/Local Sites/debug/app/public/wp-includes/rest-api/class-wp-rest-server.php(439): WP_REST_Server->dispatch(Object(WP_REST_Request))
#7 /Users/carlosrodriguez/Local Sites/debug/app/public/wp-includes/rest-api.php(428): WP_REST_Server->serve_request('/wc/v3/orders')
#8 /Users/carlosrodriguez/Local Sites/debug/app/public/wp-includes/class-wp-hook.php(324): rest_api_loaded(Object(WP))
#9 /Users/carlosrodriguez/Local Sites/debug/app/public/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array)
#10 /Users/carlosrodriguez/Local Sites/debug/app/public/wp-includes/plugin.php(565): WP_Hook->do_action(Array)
#11 /Users/carlosrodriguez/Local Sites/debug/app/public/wp-includes/class-wp.php(418): do_action_ref_array('parse_request', Array)
#12 /Users/carlosrodriguez/Local Sites/debug/app/public/wp-includes/class-wp.php(813): WP->parse_request('')
#13 /Users/carlosrodriguez/Local Sites/debug/app/public/wp-includes/functions.php(1336): WP->main('')
#14 /Users/carlosrodriguez/Local Sites/debug/app/public/wp-blog-header.php(16): wp()
#15 /Users/carlosrodriguez/Local Sites/debug/app/public/index.php(17): require('/Users/carlosro...')
#16 {main}
thrown in /Users/carlosrodriguez/Local Sites/debug/app/public/wp-content/plugins/woocommerce/includes/class-wc-discounts.php on line 979
[07-May-2024 15:03:58 UTC] Array
(
[code] => internal_server_error
[message] =>

There has been a critical error on this website.

Learn more about troubleshooting WordPress.

[data] => Array
(
[status] => 500
)

[additional_errors] => Array
    (
    )

)

Steps to reproduce

1.- Create a coupon code and include a user email on "Allowed emails" field
2.- Create an order using the WooCommerce order endpoint and associate the order to the customer that you previously set in the "Allowed emails" field.
3.- You'll see the fatal error

WordPress Environment

`

WordPress Environment

WordPress address (URL): http://debug.local
Site address (URL): http://debug.local
WC Version: 8.8.3
REST API Version: ✔ 8.8.3
Action Scheduler Version: ✔ 3.7.4
Log Directory Writable: ✔
WP Version: 6.5.2
WP Multisite: –
WP Memory Limit: 256 MB
WP Debug Mode: ✔
WP Cron: ✔
Language: en_US
External object cache: –

Server Environment

Server Info: nginx/1.16.0
PHP Version: 8.1.23
PHP Post Max Size: 1,000 MB
PHP Time Limit: 1200
PHP Max Input Vars: 4000
cURL Version: 8.1.2
(SecureTransport) LibreSSL/3.3.6

SUHOSIN Installed: –
MySQL Version: 8.0.16
Max Upload Size: 300 MB
Default Timezone is UTC: ✔
fsockopen/cURL: ✔
SoapClient: ✔
DOMDocument: ✔
GZip: ✔
Multibyte String: ✔
Remote Post: ✔
Remote Get: ✔

Database

WC Database Version: 8.8.3
WC Database Prefix: wp_
Total Database Size: 5.28MB
Database Data Size: 3.59MB
Database Index Size: 1.69MB
wp_woocommerce_sessions: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_woocommerce_api_keys: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_woocommerce_attribute_taxonomies: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_woocommerce_downloadable_product_permissions: Data: 0.02MB + Index: 0.06MB + Engine InnoDB
wp_woocommerce_order_items: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_woocommerce_order_itemmeta: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_woocommerce_tax_rates: Data: 0.02MB + Index: 0.06MB + Engine InnoDB
wp_woocommerce_tax_rate_locations: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_woocommerce_shipping_zones: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
wp_woocommerce_shipping_zone_locations: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_woocommerce_shipping_zone_methods: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
wp_woocommerce_payment_tokens: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_woocommerce_payment_tokenmeta: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_woocommerce_log: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_actionscheduler_actions: Data: 0.02MB + Index: 0.11MB + Engine InnoDB
wp_actionscheduler_claims: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_actionscheduler_groups: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_actionscheduler_logs: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_commentmeta: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_comments: Data: 0.02MB + Index: 0.08MB + Engine InnoDB
wp_links: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_options: Data: 2.50MB + Index: 0.06MB + Engine InnoDB
wp_postmeta: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_posts: Data: 0.06MB + Index: 0.06MB + Engine InnoDB
wp_term_relationships: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_term_taxonomy: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_termmeta: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_terms: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_usermeta: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_users: Data: 0.02MB + Index: 0.05MB + Engine InnoDB
wp_wc_admin_note_actions: Data: 0.05MB + Index: 0.02MB + Engine InnoDB
wp_wc_admin_notes: Data: 0.06MB + Index: 0.00MB + Engine InnoDB
wp_wc_category_lookup: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
wp_wc_customer_lookup: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_wc_download_log: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_wc_order_addresses: Data: 0.02MB + Index: 0.06MB + Engine InnoDB
wp_wc_order_coupon_lookup: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_wc_order_operational_data: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_wc_order_product_lookup: Data: 0.02MB + Index: 0.06MB + Engine InnoDB
wp_wc_order_stats: Data: 0.02MB + Index: 0.05MB + Engine InnoDB
wp_wc_order_tax_lookup: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_wc_orders: Data: 0.02MB + Index: 0.11MB + Engine InnoDB
wp_wc_orders_meta: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_wc_product_attributes_lookup: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_wc_product_download_directories: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_wc_product_meta_lookup: Data: 0.02MB + Index: 0.09MB + Engine InnoDB
wp_wc_rate_limits: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_wc_reserved_stock: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
wp_wc_tax_rate_classes: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_wc_webhooks: Data: 0.02MB + Index: 0.02MB + Engine InnoDB

Post Type Counts

attachment: 1
page: 7
post: 2
product: 1
revision: 1
shop_coupon: 3
shop_order: 7
wp_font_face: 33
wp_font_family: 12

Security

Secure connection (HTTPS): ❌
Your store is not using HTTPS. Learn more about HTTPS and SSL Certificates.
Hide errors from visitors: ✔

Active Plugins (1)

WooCommerce: by Automattic – 8.8.3

Inactive Plugins (0)

Settings

API Enabled: –
Force SSL: –
Currency: EUR (€)
Currency Position: right_space
Thousand Separator: .
Decimal Separator: ,
Number of Decimals: 2
Taxonomies: Product Types: external (external)
grouped (grouped)
simple (simple)
variable (variable)

Taxonomies: Product Visibility: exclude-from-catalog (exclude-from-catalog)
exclude-from-search (exclude-from-search)
featured (featured)
outofstock (outofstock)
rated-1 (rated-1)
rated-2 (rated-2)
rated-3 (rated-3)
rated-4 (rated-4)
rated-5 (rated-5)

Connected to WooCommerce.com: –
Enforce Approved Product Download Directories: ✔
HPOS feature screen enabled: ✔
HPOS feature enabled: ✔
Order datastore: Automattic\WooCommerce\Internal\DataStores\Orders\OrdersTableDataStore
HPOS data sync enabled: ✔

Logging

Enabled: ✔
Handler: Automattic\WooCommerce\Internal\Admin\Logging\LogHandlerFileV2
Retention period: 30 days
Level threshold: –
Log directory size: 6 KB

WC Pages

Shop base: #6 - /shop/
Cart: #7 - /cart/
Checkout: #8 - /checkout/
My account: #9 - /my-account/
Terms and conditions: ❌ Page not set

Theme

Name: Storefront
Version: 4.5.5
Author URL: https://woocommerce.com/
Child Theme: ❌ – If you are modifying WooCommerce on a parent theme that you did not build personally we recommend using a child theme. See: How to create a child theme
WooCommerce Support: ✔

Templates

Overrides: –

Admin

Enabled Features: activity-panels
analytics
product-block-editor
coupons
core-profiler
customize-store
customer-effort-score-tracks
import-products-task
experimental-fashion-sample-products
shipping-smart-defaults
shipping-setting-tour
homescreen
marketing
mobile-app-banner
navigation
onboarding
onboarding-tasks
product-variation-management
product-virtual-downloadable
product-external-affiliate
product-grouped
product-linked
product-pre-publish-modal
remote-inbox-notifications
remote-free-extensions
payment-gateway-suggestions
shipping-label-banner
subscriptions
store-alerts
transient-notices
woo-mobile-welcome
wc-pay-promotion
wc-pay-welcome-page

Disabled Features: minified-js
new-product-management-experience
product-custom-fields
settings
async-product-editor-category-field
launch-your-store

Daily Cron: ✔ Next scheduled: 2024-05-08 14:26:54 +00:00
Options: ✔
Notes: 65
Onboarding: completed

Action Scheduler

Complete: 18
Oldest: 2024-05-07 14:26:55 +0000
Newest: 2024-05-07 14:49:34 +0000

Failed: 1
Oldest: 2024-05-07 14:28:23 +0000
Newest: 2024-05-07 14:28:23 +0000

Pending: 3
Oldest: 2024-05-07 15:48:55 +0000
Newest: 2024-05-08 14:28:11 +0000

Status report information

Generated at: 2024-05-07 15:04:11 +00:00
`

Isolating the problem

• I have deactivated other plugins and confirmed this bug occurs when only WooCommerce plugin is active.
• This bug happens with a default WordPress theme active, or Storefront.
• I can reproduce this bug consistently using the steps above.