From 1089e72ef67246035bff79c429375cb6e27338c5 Mon Sep 17 00:00:00 2001
From: "mr. m" <91018726+mr-cheffy@users.noreply.github.com>
Date: Fri, 27 Mar 2026 23:01:26 +0100
Subject: [PATCH] no-bug: update migration data access to handle undefined
 safely (gh-12956)

---
 src/zen/spaces/ZenSpaceManager.mjs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/zen/spaces/ZenSpaceManager.mjs b/src/zen/spaces/ZenSpaceManager.mjs
index 43cf1c838..6b8dd64d1 100644
--- a/src/zen/spaces/ZenSpaceManager.mjs
+++ b/src/zen/spaces/ZenSpaceManager.mjs
@@ -777,7 +777,7 @@ class nsZenWorkspaces {
     if (
       !this.privateWindowOrDisabled &&
       spacesFromStore.length === 0 &&
-      lazy.ZenSessionStore._migrationData
+      lazy.ZenSessionStore._migrationData?.spaces
     ) {
       spacesFromStore.push(...lazy.ZenSessionStore._migrationData.spaces);
     }