Fixed issue: Fatal error when using unary operator on empty string

LimeSurvey · Aug 17, 2021 · cd7e46b · cd7e46b
1 parent 6b8bb14
commit cd7e46b
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/application/helpers/expressions/em_core_helper.php b/application/helpers/expressions/em_core_helper.php
@@ -554,6 +554,10 @@ private function RDP_EvaluateUnary(array $token)
             $this->RDP_AddError(self::gT("Invalid value(s) on the stack"), $token);
             return false;
         }
+        // If argmument is empty, then assume it is 0
+        if ($arg1[0] == '') {
+             $arg1[0] = 0;
+        };
         // TODO:  try to determine datatype?
         switch ($token[0]) {
             case '+':