From 222ce04757bc5f938007928765f73f60c738ce06 Mon Sep 17 00:00:00 2001
From: Matthew Wire <mjw@mjwconsult.co.uk>
Date: Sun, 25 Jul 2021 17:19:10 +0100
Subject: [PATCH] Check for "NULL" page in addPages so we don't crash when
 calling require_once

---
 CRM/Core/Controller.php | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/CRM/Core/Controller.php b/CRM/Core/Controller.php
index 0a5f6482e8d5..df2c08d38449 100644
--- a/CRM/Core/Controller.php
+++ b/CRM/Core/Controller.php
@@ -433,6 +433,11 @@ public function setStateMachine($stateMachine) {
   public function addPages(&$stateMachine, $action = CRM_Core_Action::NONE) {
     $pages = $stateMachine->getPages();
     foreach ($pages as $name => $value) {
+      if (empty($name)) {
+        // An "empty" page can happen eg. when triggered from a StateMachine/Search class
+        //   when there are no SearchTasks defined.
+        continue;
+      }
       $className = CRM_Utils_Array::value('className', $value, $name);
       $title = $value['title'] ?? NULL;
       $options = $value['options'] ?? NULL;