From 5116f2285dc1fa8d4dec413dc176cb7848851cd4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Luca=20B=C3=B6sch?= <luca.boesch@bfh.ch>
Date: Thu, 18 Jan 2024 18:14:19 +0100
Subject: [PATCH] Circumvent number on string error, resolves #538.

---
 classes/question/numerical.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/classes/question/numerical.php b/classes/question/numerical.php
index f6e6a36c..994e000b 100644
--- a/classes/question/numerical.php
+++ b/classes/question/numerical.php
@@ -83,7 +83,7 @@ protected function question_survey_display($response, $descendantsdata, $blankqu
         // Numeric.
         $questiontags = new \stdClass();
         $precision = $this->precise;
-        $a = '';
+        $a = new \stdClass();
         if (isset($response->answers[$this->id][0])) {
             $mynumber = $response->answers[$this->id][0]->value;
             if ($mynumber != '') {