fixed doneCh buffer size

view.go

@@ -33,7 +33,7 @@ func NewForWriter[K comparable](w io.Writer) *View[K] {
 		taskMap: map[K]struct{}{},
 
 		reportCh:    make(chan report[K], 100),
-		doneCh:      make(chan struct{}),
+		doneCh:      make(chan struct{}, 1),
 		lastReports: map[K]report[K]{},
 		wg:          &sync.WaitGroup{},
 	}