Fatal error on 4.18.8 (patch attached)

There is a fatal error in includes/class-wc-gateway-revolut-blocks-support.php file. The function get_option returns false if the option does not exist in the database; if you try to run array_merge on non-array value, PHP throws a fatal error. Please check your argument types better.

Here’s a simple patch:

From e8b898b1423d3573754fb62eb9d41fd11a1b3ac3 Mon Sep 17 00:00:00 2001
From: Aleksandr Yakovlev <keloero@oreolek.me>
Date: Wed, 19 Mar 2025 11:12:27 +0600
Subject: [PATCH] Check type on settings

get_option() returns false if option does not exists, not the
default value; array_merge() fatally breaks on non-array values.
---
 ...lass-wc-gateway-revolut-blocks-support.php | 20 +++++++++++++++----
 1 file changed, 16 insertions(+), 4 deletions(-)

diff --git a/includes/class-wc-gateway-revolut-blocks-support.php b/includes/class-wc-gateway-revolut-blocks-support.php
index 48c2543..4b1c4c8 100644
--- a/includes/class-wc-gateway-revolut-blocks-support.php
+++ b/includes/class-wc-gateway-revolut-blocks-support.php
@@ -66,10 +66,22 @@ class WC_Gateway_Revolut_Blocks_Support extends Automattic\WooCommerce\Blocks\Pa
 	 * Initializes the payment gateway
 	 */
 	public function initialize() {
-		$this->settings = array_merge(
-			get_option( 'woocommerce_revolut_cc_settings', array() ),
-			get_option( 'woocommerce_revolut_pay_settings', array() ),
-			get_option( 'woocommerce_revolut_payment_request_settings', array() )
+		$settings_1 = get_option( 'woocommerce_revolut_cc_settings', array() );
+    if ($settings_1 === false) {
+      $settings_1 = [];
+    }
+    $settings_2 = get_option( 'woocommerce_revolut_pay_settings', array() );
+    if ($settings_2 === false) {
+      $settings_2 = [];
+    }
+		$settings_3 = get_option( 'woocommerce_revolut_payment_request_settings', array() );
+    if ($settings_3 === false) {
+      $settings_3 = [];
+    }
+    $this->settings = array_merge(
+      $settings_1,
+      $settings_2,
+      $settings_3
 		);
 	}
 
-- 
2.49.0