} else if bytes.Contains(buf, []byte("go.l__ufer.Run")) {
		return toSymbolV1, nil
	} else {
		return nil, errors.New(cmd + ": unrecognized mangling scheme")
	}
}

// mangleCheckCode is the package we compile to determine the mangling scheme.
const mangleCheckCode = `
package läufer
func Run(x int) int {
  return 1
}
`

// toSymbolV1 converts a package path using the original mangling scheme.

		"p____",
		"p..u00e4..u4e16.x2e..U0001f703",
		"p_u00e4_u4e16_0_U0001f703",
	},
}

func TestV1(t *testing.T) {
	for _, test := range symbolTests {
		if got, want := toSymbolV1(test.input), test.v1; got != want {
			t.Errorf("toSymbolV1(%q) = %q, want %q", test.input, got, want)
		}
	}
}

func TestV2(t *testing.T) {
	for _, test := range symbolTests {