From c4d01c04a48001eb731fcf00831991fe8282aeb2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C5=81ukasz=20Magiera?= <magik6k@gmail.com>
Date: Fri, 15 May 2020 19:06:52 +0200
Subject: [PATCH] chainwatch: don't crash with nil ticket

---
 cmd/lotus-chainwatch/storage.go | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/cmd/lotus-chainwatch/storage.go b/cmd/lotus-chainwatch/storage.go
index 47f367e8d..020ca1d7f 100644
--- a/cmd/lotus-chainwatch/storage.go
+++ b/cmd/lotus-chainwatch/storage.go
@@ -653,6 +653,14 @@ create temp table b (like blocks excluding constraints) on commit drop;
 			eprof = bh.ElectionProof.VRFProof
 		}
 
+		if bh.Ticket == nil {
+			log.Warnf("got a block with nil ticket")
+
+			bh.Ticket = &types.Ticket{
+				VRFProof: []byte{},
+			}
+		}
+
 		if _, err := stmt2.Exec(
 			bh.Cid().String(),
 			bh.ParentWeight.String(),