From 9c9a3259eecfb49674f9e3fdc91bac2fe89269ee Mon Sep 17 00:00:00 2001
From: skodak <skodak>
Date: Mon, 10 Mar 2008 09:35:42 +0000
Subject: [PATCH] MDL-13863 detect missing idnumbers in formulas after restore;
 merged from MOODLE_19_STABLE

---
 lib/grade/grade_item.php | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/lib/grade/grade_item.php b/lib/grade/grade_item.php
index 17bcada4dd..0eb79ec915 100644
--- a/lib/grade/grade_item.php
+++ b/lib/grade/grade_item.php
@@ -1589,6 +1589,10 @@ class grade_item extends grade_object {
 
         // prepare formula and init maths library
         $formula = preg_replace('/##(gi\d+)##/', '\1', $this->calculation);
+        if (strpos($formula, '[[') !== false) {
+            // missing item
+            return false;
+        }
         $this->formula = new calc_formula($formula);
 
         // where to look for final grades?
-- 
2.39.5