From 476ccb22069b8096273cf602c0d564bad24518eb Mon Sep 17 00:00:00 2001
From: AnotherTest <ali.mpfard@gmail.com>
Date: Tue, 30 Jun 2020 23:02:10 +0430
Subject: [PATCH] LibGUI: Do not recurse into rows with invalid indices

That would cause the traversal to go into an infinite loop.
---
 Libraries/LibGUI/TreeView.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Libraries/LibGUI/TreeView.cpp b/Libraries/LibGUI/TreeView.cpp
index d21e571db46172..258f902afb090b 100644
--- a/Libraries/LibGUI/TreeView.cpp
+++ b/Libraries/LibGUI/TreeView.cpp
@@ -183,6 +183,9 @@ void TreeView::traverse_in_paint_order(Callback callback) const
                 return IterationDecision::Continue;
         }
 
+        if (indent_level > 0 && !index.is_valid())
+            return IterationDecision::Continue;
+
         ++indent_level;
         int row_count = model.row_count(index);
         for (int i = 0; i < row_count; ++i) {