fix: nil condition

bnb-chain · Jul 20, 2022 · 68f0488 · 68f0488
1 parent 7a9a8be
commit 68f0488
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/core/state/statedb.go b/core/state/statedb.go
@@ -228,7 +228,11 @@ func (s *StateDB) StopPrefetcher() {
 	if s.noTrie {
 		return
 	}
-	s.prefetcher.close()
+	s.prefetcherLock.Lock()
+	if s.prefetcher != nil {
+		s.prefetcher.close()
+	}
+	s.prefetcherLock.Unlock()
 }
 
 func (s *StateDB) TriePrefetchInAdvance(block *types.Block, signer types.Signer) {