// on the rm will fail with EBUSY.
	if err := os.Remove(d); err != nil {
		t.Errorf("rmdir failed on %v: %v", d, err)
	}
}

// Test for Issue 20103: unshare fails when chroot is used
func TestUnshareMountNameSpaceChroot(t *testing.T) {
	const mountNotSupported = "mount is not supported: " // Output prefix indicating a test skip.
	if os.Getenv("GO_WANT_HELPER_PROCESS") == "1" {
		dir := flag.Args()[0]