Fixed issue #11867: Tip are not working

LimeSurvey · Dec 7, 2016 · e8dfa77 · e8dfa77
1 parent 148b54b
commit e8dfa77
Showing 1 changed file with 9 additions and 0 deletions.
diff --git a/application/helpers/expressions/em_manager_helper.php b/application/helpers/expressions/em_manager_helper.php
@@ -3509,6 +3509,15 @@ public function _CreateSubQLevelRelevanceAndValidationEqns($onlyThisQseq=NULL)
                 {
                     $veqns[$vclass] = '(' . implode(' and ', $eqns) . ')';
                 }
+
+                // Finally, we prevent bugs by removing empty equations
+                // @see: https://bugs.limesurvey.org/view.php?id=11867#c42419
+                foreach ($veqns as $key => $eqn){
+                    if ($eqn=='()'){
+                        unset($veqns[$key]);
+                    }
+                }
+
                 $this->qid2validationEqn[$qid] = array(
                 'eqn' => $veqns,
                 'tips' => $tips,