From 53f835b3cec0cd59df5199609bd03e012f66d6b5 Mon Sep 17 00:00:00 2001
From: Maurice Parker <mo@vincode.io>
Date: Fri, 2 Dec 2022 20:53:10 -0600
Subject: [PATCH] Guard against negative numbers. Fixes #3768

---
 iOS/SceneCoordinator.swift | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/iOS/SceneCoordinator.swift b/iOS/SceneCoordinator.swift
index 2b63e3199..b26cdc5da 100644
--- a/iOS/SceneCoordinator.swift
+++ b/iOS/SceneCoordinator.swift
@@ -657,7 +657,10 @@ class SceneCoordinator: NSObject, UndoableCommandRunner {
 	}
 	
 	func nodeFor(_ indexPath: IndexPath) -> Node? {
-		guard indexPath.section < shadowTable.count && indexPath.row < shadowTable[indexPath.section].feedNodes.count else {
+		guard indexPath.section > -1 &&
+				indexPath.row > -1 &&
+				indexPath.section < shadowTable.count &&
+				indexPath.row < shadowTable[indexPath.section].feedNodes.count else {
 			return nil
 		}
 		return shadowTable[indexPath.section].feedNodes[indexPath.row].node