fix potential panic with max readers retry and cursor channel

2021-02-01 18:39:50 +02:00 · 2021-02-01 18:39:50 +02:00 · d91b60df91
commit d91b60df91
parent b9f8a3d587
1 changed files with 2 additions and 1 deletions
--- a/chain/store/splitstore/snoop.go
+++ b/chain/store/splitstore/snoop.go
@ -131,10 +131,11 @@ func (s *trackingStore) Delete(cid cid.Cid) error {
 func (s *trackingStore) Keys(ctx context.Context) (<-chan cid.Cid, error) {
 	ch := make(chan cid.Cid)
 	go func() {
+		defer close(ch)
+
 		err := withMaxReadersRetry(
 			func() error {
 				return s.env.View(func(txn *lmdb.Txn) error {
-					defer close(ch)

 					txn.RawRead = true
 					cur, err := txn.OpenCursor(s.db)