// Code should not do this, but some old code dating to Go 1.9 does.
	// Make sure this doesn't crash.
	// See go.dev/issue/21874.
	c := make(chan Time)
	tick := &Ticker{C: c}
	tick.Stop()
}

func TestAfterTimes(t *testing.T) {
	t.Parallel()
	// Using After(10ms) but waiting for 500ms to read the channel
	// should produce a time from start+10ms, not start+500ms.
	// Make sure it does.