From b0ad69cc248106c05d1e96fc806c37229bbf73d7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Miroslav=20Bend=C3=ADk?= <miroslav.bendik@gmail.com>
Date: Wed, 29 Sep 2021 17:38:32 +0200
Subject: [PATCH] Fixed expand frame exception

---
 src/werkzeug/debug/shared/debugger.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/werkzeug/debug/shared/debugger.js b/src/werkzeug/debug/shared/debugger.js
index cd9efcdff6..2354f0300d 100644
--- a/src/werkzeug/debug/shared/debugger.js
+++ b/src/werkzeug/debug/shared/debugger.js
@@ -21,9 +21,9 @@ docReady(() => {
 });
 
 function addToggleFrameTraceback(frames) {
-  frames.forEach((frame, i) => {
+  frames.forEach((frame) => {
     frame.addEventListener("click", () => {
-      frame.getElementsByTagName("pre")[i].parentElement.classList.toggle("expanded");
+      frame.getElementsByTagName("pre")[0].parentElement.classList.toggle("expanded");
     });
   })
 }