From 82cb5b6f6407405ac25f0788a55e29a983b49193 Mon Sep 17 00:00:00 2001
From: Andreas Kling <kling@serenityos.org>
Date: Tue, 21 Jan 2020 21:06:00 +0100
Subject: [PATCH] LibGUI: GFileSystemModel::index() now survives negative
 inputs

If asked to create an index with negative row and/or column, we should
just return an invalid GModelIndex() instead of asserting.
---
 Libraries/LibGUI/GFileSystemModel.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Libraries/LibGUI/GFileSystemModel.cpp b/Libraries/LibGUI/GFileSystemModel.cpp
index 27d261654da..0aa57d8c3d9 100644
--- a/Libraries/LibGUI/GFileSystemModel.cpp
+++ b/Libraries/LibGUI/GFileSystemModel.cpp
@@ -297,6 +297,8 @@ const GFileSystemModel::Node& GFileSystemModel::node(const GModelIndex& index) c
 
 GModelIndex GFileSystemModel::index(int row, int column, const GModelIndex& parent) const
 {
+    if (row < 0 || column < 0)
+        return {};
     auto& node = this->node(parent);
     const_cast<Node&>(node).reify_if_needed(*this);
     if (row >= node.children.size())