From 2461a56d764bc3b5ed6532e69091fd31ac2d4188 Mon Sep 17 00:00:00 2001
From: Dominik Vitt <dominik.vitt.hr@gmail.com>
Date: Mon, 22 Oct 2018 17:54:54 +0200
Subject: [PATCH] Fixed issue #10162: new visit on a survey with token deletes
 last entry

---
 application/helpers/frontend_helper.php | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/application/helpers/frontend_helper.php b/application/helpers/frontend_helper.php
index 89a289d13bd..bf06cdb3569 100644
--- a/application/helpers/frontend_helper.php
+++ b/application/helpers/frontend_helper.php
@@ -2047,6 +2047,11 @@ function killSurveySession($iSurveyID)
     unset($_SESSION['survey_'.$iSurveyID]);
     // Force EM to refresh
     LimeExpressionManager::SetDirtyFlag();
+
+    //  unsetting LEMsingleton from session so new survey execution would start with new LEM instance
+    //  SetDirtyFlag() method doesn't reset LEM properly
+    //  this solution fixes bug: https://bugs.limesurvey.org/view.php?id=10162
+    unset($_SESSION["LEMsingleton"]);
 }
 
 /**