return
		}
		uch, _ := u.(*Chan)
		if uch == nil {
			check.errorf(s, InvalidSend, invalidOp+"cannot send to non-channel %s", &ch)
			return
		}
		if uch.dir == RecvOnly {
			check.errorf(s, InvalidSend, invalidOp+"cannot send to receive-only channel %s", &ch)
			return
		}
		check.assignment(&val, uch.elem, "send")

	case *syntax.AssignStmt:
		if s.Rhs == nil {