Fix race condition in TestFileStoreAgeLimitRecovery

server/filestore.go

@@ -419,8 +419,11 @@ func newFileStoreWithCreated(fcfg FileStoreConfig, cfg StreamConfig, created tim
 	// If the stream has an initial sequence number then make sure we
 	// have purged up until that point. We will do this only if the
 	// recovered first sequence number is before our configured first
-	// sequence.
+	// sequence. Need to do this locked as by now the age check timer
+	// has started.
+	fs.mu.RLock()
 	fs.FastState(&fs.state)
+	fs.mu.RUnlock()
 	if cfg.FirstSeq > 0 && fs.state.FirstSeq <= cfg.FirstSeq {
 		if _, err := fs.purge(cfg.FirstSeq); err != nil {
 			return nil, err