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includes/customizer/class-wc-shop-customizer.php

@@ -506,7 +506,7 @@ class WC_Shop_Customizer {
 		$wp_customize->add_setting(
 			'woocommerce_thumbnail_cropping',
 			array(
-				'default'           => '1: 1',
+				'default'           => '1:1',
 				'type'              => 'option',
 				'capability'        => 'manage_woocommerce',
 				'sanitize_callback' => 'wc_clean',

includes/wc-core-functions.php

@@ -2019,7 +2019,7 @@ function wc_decimal_to_fraction( $decimal ) {
 	}
 
 	if ( 0 === $decimal ) {
-		return [ 0, 0 ];
+		return array( 0, 1 );
 	}
 
 	$tolerance   = 1.e-4;