From 05e23b058c210235786b8a3d9307e0f8cfba0619 Mon Sep 17 00:00:00 2001
From: Mononaut <github@monospace.live>
Date: Fri, 27 Jan 2023 20:01:31 -0600
Subject: [PATCH] Fix navigation-breaking js error on liquid block page

---
 .../src/app/components/block/block.component.ts  | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/frontend/src/app/components/block/block.component.ts b/frontend/src/app/components/block/block.component.ts
index 05c5db41a..f1ebfed6a 100644
--- a/frontend/src/app/components/block/block.component.ts
+++ b/frontend/src/app/components/block/block.component.ts
@@ -439,17 +439,17 @@ export class BlockComponent implements OnInit, OnDestroy {
 
   ngOnDestroy() {
     this.stateService.markBlock$.next({});
-    this.transactionSubscription.unsubscribe();
+    this.transactionSubscription?.unsubscribe();
     this.overviewSubscription?.unsubscribe();
     this.auditSubscription?.unsubscribe();
-    this.keyNavigationSubscription.unsubscribe();
-    this.blocksSubscription.unsubscribe();
-    this.networkChangedSubscription.unsubscribe();
-    this.queryParamsSubscription.unsubscribe();
-    this.timeLtrSubscription.unsubscribe();
-    this.auditSubscription.unsubscribe();
+    this.keyNavigationSubscription?.unsubscribe();
+    this.blocksSubscription?.unsubscribe();
+    this.networkChangedSubscription?.unsubscribe();
+    this.queryParamsSubscription?.unsubscribe();
+    this.timeLtrSubscription?.unsubscribe();
+    this.auditSubscription?.unsubscribe();
     this.unsubscribeNextBlockSubscriptions();
-    this.childChangeSubscription.unsubscribe();
+    this.childChangeSubscription?.unsubscribe();
   }
 
   unsubscribeNextBlockSubscriptions() {