From 0aaacc446a00c72864ce55f044c7c818c9f2f949 Mon Sep 17 00:00:00 2001
From: David Woloszyn <david.woloszyn@moodle.com>
Date: Tue, 23 Sep 2025 14:01:55 +1000
Subject: [PATCH] MDL-86494 router: Display error details only when debugging
 is on

---
 lib/classes/router.php | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/lib/classes/router.php b/lib/classes/router.php
index 3a5e70bea0a..f1f3a0e9655 100644
--- a/lib/classes/router.php
+++ b/lib/classes/router.php
@@ -198,11 +198,14 @@ class router {
      * Add the Error Handling Middleware to the RouteGroup.
      */
     protected function add_error_handler_middleware(): void {
+        global $CFG;
+        // Display error details only when debugging is on.
+        $displayerrordetails = !empty($CFG->debugdisplay);
         // Add the Error Handling Middleware and configure it to show Moodle Errors for HTML pages.
         $errormiddleware = new ErrorMiddleware(
             $this->app->getCallableResolver(),
             $this->app->getResponseFactory(),
-            displayErrorDetails: true,
+            displayErrorDetails: $displayerrordetails,
             logErrors: true,
             logErrorDetails: true,
         );