}
	f := os.NewFile(uintptr(p[0]), "pipe")
	nonblock, err := unix.IsNonblock(p[0])
	if err != nil {
		t.Fatal(err)
	}
	defer f.Close()
	if !nonblock {
		t.Error("pipe blocking after NewFile")
	}
	fd := f.Fd()
	if fd != uintptr(p[0]) {
		t.Errorf("Fd returned %d, want %d", fd, p[0])
	}
	nonblock, err = unix.IsNonblock(p[0])
	if err != nil {
		t.Fatal(err)
	}
	if !nonblock {