ech

Signed-off-by: VihasMakwana <121151420+VihasMakwana@users.noreply.github.com>

Author: VihasMakwana

db.go

@@ -1254,18 +1254,16 @@ func (db *DB) freepages() []common.Pgid {
 	nofreed := make(map[common.Pgid]bool)
 	ech := make(chan error)
 
-	var wg sync.WaitGroup
-
-	wg.Add(1)
 	go func() {
-		defer wg.Done()
+		defer close(ech)
 		tx.recursivelyCheckBucket(&tx.root, reachable, nofreed, HexKVStringer(), ech)
-		close(ech)
 	}()
+	// following for loop will exit once channel is closed in the above goroutine.
+	// we don't need to wait explictly with a waitgroup
 	for e := range ech {
 		panic(fmt.Sprintf("freepages: failed to get all reachable pages (%v)", e))
 	}
-	wg.Wait()
+
 	// TODO: If check bucket reported any corruptions (ech) we shouldn't proceed to freeing the pages.
 
 	var fids []common.Pgid