From cdc7c7f6cad9a2dc314ee9e7c6fb2f44f96a30f5 Mon Sep 17 00:00:00 2001
From: Jaco Greeff <jacogr@gmail.com>
Date: Tue, 19 Jan 2021 17:39:41 +0100
Subject: [PATCH] Gurad for Candidate{Backed, Included} events (#4451)

---
 .../page-parachains/src/Overview/ParachainList.tsx   | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/packages/page-parachains/src/Overview/ParachainList.tsx b/packages/page-parachains/src/Overview/ParachainList.tsx
index fb7574f1e8..adafb7020a 100644
--- a/packages/page-parachains/src/Overview/ParachainList.tsx
+++ b/packages/page-parachains/src/Overview/ParachainList.tsx
@@ -29,11 +29,13 @@ interface LastEvents {
 function includeEntry (map: EventMap, event: Event, blockHash: string, blockNumber: BN): void {
   const { descriptor } = event.data[0] as CandidateReceipt;
 
-  map[descriptor.paraId.toString()] = [
-    blockHash,
-    descriptor.relayParent.toHex(),
-    blockNumber
-  ];
+  if (descriptor) {
+    map[descriptor.paraId.toString()] = [
+      blockHash,
+      descriptor.relayParent.toHex(),
+      blockNumber
+    ];
+  }
 }
 
 function ParachainList ({ ids, scheduled }: Props): React.ReactElement<Props> {