Ensure compatibility with SS 3.7 & PHP 7.2

_config.php

@@ -17,3 +17,9 @@
 
 */
 );
+
+// Ensure compatibility with PHP 7.2 ("object" is a reserved word),
+// with SilverStripe 3.6 (using Object) and SilverStripe 3.7 (using SS_Object)
+if (!class_exists('SS_Object')) {
+    class_alias('Object', 'SS_Object');
+}

code/RecursionReader.php

@@ -1,6 +1,6 @@
 <?php
 
-class RecursionReader extends Object {
+class RecursionReader extends SS_Object {
 
 	const DAY = 86400;
 
@@ -19,6 +19,8 @@ public static function difference_in_months($dateObj1,$dateObj2) {
 	}
 
 	public function __construct(CalendarEvent $event) {
+	    parent::__construct();
+
 		$this->event = $event;
 		$this->datetimeClass = $event->Parent()->getDateTimeClass();
 		$this->eventClass = $event->Parent()->getEventClass();