}
				wantNG(0)
			}
			wantNG(0)

			stop()
			stop()
			stop()
			wantNG(0)
		})
	}
}

// stableNumGoroutine is like NumGoroutine but tries to ensure stability of
// the value by letting any exiting goroutines finish exiting.
func stableNumGoroutine() int {
	// The idea behind stablizing the value of NumGoroutine is to
	// see the same value enough times in a row in between calls to