"golang.org/x",
	"github.com/google/pprof",
	"github.com/ianlancetaylor/demangle",
	"rsc.io/markdown",
}

// Verify that the vendor directories contain only packages matching the list above.
func TestVendorPackages(t *testing.T) {
	_, thisFile, _, _ := runtime.Caller(0)
	goBin := testenv.GoToolPath(t)
	listCmd := testenv.Command(t, goBin, "list", "std", "cmd")
	out, err := listCmd.Output()
	if err != nil {
		t.Fatal(err)