From 2c6337678253dfb2186be4df1082e0e980650c8c Mon Sep 17 00:00:00 2001
From: "mr. m" <mr.m@tuta.com>
Date: Sun, 25 Jan 2026 19:58:18 +0100
Subject: [PATCH] fix: Fixed handling split data that may be undefined,
 b=no-bug, c=split-view

---
 src/zen/split-view/ZenViewSplitter.mjs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/zen/split-view/ZenViewSplitter.mjs b/src/zen/split-view/ZenViewSplitter.mjs
index 95d520663..036297313 100644
--- a/src/zen/split-view/ZenViewSplitter.mjs
+++ b/src/zen/split-view/ZenViewSplitter.mjs
@@ -2131,7 +2131,9 @@ class nsZenViewSplitter extends nsZenDOMOperatedFeature {
 
       const layout = deserializeNode(groupData.layoutTree);
       const splitData = this.splitTabs(group.tabs, groupData.gridType, -1);
-      splitData.layoutTree = layout;
+      if (splitData) {
+        splitData.layoutTree = layout;        
+      }
     }
 
     delete this._sessionRestoring;