if err != nil {
			t.Fatalf("req #%d: client ReadAll: %v", i, err)
		}
		if len(all) != 0 {
			t.Errorf("req #%d: client got %d bytes; expected 0", i, len(all))
		}
	}
}

func TestHandlerPanicNil(t *testing.T) {
	run(t, func(t *testing.T, mode testMode) {
		testHandlerPanic(t, false, mode, nil, nil)
	}, testNotParallel)
}

func TestHandlerPanic(t *testing.T) {