3.14 /* ERROR "cannot assign" */ ++
	var (
		x int
		y float32
		z complex128
	)
	x++
	y--
	z++
}

func sends() {
	var ch chan int
	var rch <-chan int
	var x int
	x <- /* ERROR "cannot send" */ x
	rch <- /* ERROR "cannot send" */ x
	ch <- "foo" /* ERRORx `cannot use .* in send` */
	ch <- x
}

func selects() {
	select {}
	var (
		ch chan int
		sc chan <- bool

// and then proxies to w.
// It proxies Read calls to a reader it receives from rch.
type logWritesConn struct {
	net.Conn // nil. crash on use.

	w io.Writer

	rch <-chan io.Reader
	r   io.Reader // nil until received by rch

	mu     sync.Mutex
	writes []string
}

func (c *logWritesConn) Write(p []byte) (n int, err error) {
	c.mu.Lock()