p2p/discv5: fix topic register panic at shutdown (#15946)

7 years ago · 397c6cde1e
parent 302c17c36a
commit 397c6cde1e
1 changed files with 1 additions and 1 deletions
--- a/p2p/discv5/ticket.go
+++ b/p2p/discv5/ticket.go
@ -350,7 +350,7 @@ func (s *ticketStore) nextFilteredTicket() (*ticketRef, time.Duration) {

 		regTime := now + mclock.AbsTime(wait)
 		topic := ticket.t.topics[ticket.idx]
-		if regTime >= s.tickets[topic].nextReg {
+		if s.tickets[topic] != nil && regTime >= s.tickets[topic].nextReg {
 			return ticket, wait
 		}
 		s.removeTicketRef(*ticket)