SYS_AFS_SYSCALL             = 137
	SYS_SETFSUID                = 138
	SYS_SETFSGID                = 139
	SYS__LLSEEK                 = 140
	SYS_GETDENTS                = 141
	SYS__NEWSELECT              = 142
	SYS_FLOCK                   = 143
	SYS_MSYNC                   = 144
	SYS_READV                   = 145
	SYS_WRITEV                  = 146
	SYS_GETSID                  = 147
	SYS_FDATASYNC               = 148

	testCases := []struct {
		objectName string
		crcHash    int
	}{
		// cases which should pass the test.
		// passing in valid object name.
		{"object", 28},
		{"The Shining Script <v1>.pdf", 142},
		{"Cost Benefit Analysis (2009-2010).pptx", 133},
		{"117Gn8rfHL2ACARPAhaFd0AGzic9pUbIA/5OCn5A", 185},
		{"SHØRT", 97},
		{"There are far too many object names, and far too few bucket names!", 101},
		{"a/b/c/", 193},

	} else if x == 137 {
		x += 137
	} else if x == 138 {
		x += 138
	} else if x == 139 {
		x += 139
	} else if x == 140 {
		x += 140
	} else if x == 141 {
		x += 141
	} else if x == 142 {
		x += 142
	} else if x == 143 {
		x += 143
	} else if x == 144 {
		x += 144
	} else if x == 145 {
		x += 145
	} else if x == 146 {
		x += 146
	} else if x == 147 {
		x += 147

	SYS_SETFSUID                     = 138
	SYS_SETFSGID                     = 139
	SYS__LLSEEK                      = 140
	SYS_GETDENTS                     = 141
	SYS__NEWSELECT                   = 142
	SYS_FLOCK                        = 143
	SYS_MSYNC                        = 144
	SYS_READV                        = 145
	SYS_WRITEV                       = 146
	SYS_GETSID                       = 147

	_ = x[ErrInvalidSSECustomerAlgorithm-138]
	_ = x[ErrInvalidSSECustomerKey-139]
	_ = x[ErrMissingSSECustomerKey-140]
	_ = x[ErrMissingSSECustomerKeyMD5-141]
	_ = x[ErrSSECustomerKeyMD5Mismatch-142]
	_ = x[ErrInvalidSSECustomerParameters-143]
	_ = x[ErrIncompatibleEncryptionMethod-144]
	_ = x[ErrKMSNotConfigured-145]
	_ = x[ErrKMSKeyNotFoundException-146]
	_ = x[ErrKMSDefaultKeyAlreadyConfigured-147]

  module attributes {tf.versions = {bad_consumers = [], min_consumer = 0 : i32, producer = 1442 : i32}} {
    func.func @main(%arg0: tensor<2xf32>) -> tensor<2xf32> {
      %0 = "tf.Const"() {value = dense<1.42> : tensor<2xf32>} : () -> tensor<2xf32>
      %1 = "tf.Atan2"(%arg0, %0) : (tensor<2xf32>, tensor<2xf32>) -> tensor<2xf32>
      func.return %0 : tensor<2xf32>
    }
  })";

TEST_F(GradientsTest, StackUnstack_Chained) {
  for (const bool expected : {false, true}) {
    const Scope& scope = expected ? scope_expected_ : scope_test_;
    // Construct forward graph.
    auto a = Const(scope, 1, {4, 2});
    auto b = Const(scope, 2, {4, 2});
    auto c = Const(scope, 3, {4, 2});

    auto pack = Stack(scope, {a, b, c});
    auto unpack = Unstack(scope, pack.output, 3);
    TF_ASSERT_OK(scope.status());

	{"kern.cp_time", []_C_int{1, 40}},
	{"kern.cp_time2", []_C_int{1, 71}},
	{"kern.cpustats", []_C_int{1, 85}},
	{"kern.domainname", []_C_int{1, 22}},
	{"kern.file", []_C_int{1, 73}},
	{"kern.forkstat", []_C_int{1, 42}},
	{"kern.fscale", []_C_int{1, 46}},
	{"kern.fsync", []_C_int{1, 33}},
	{"kern.global_ptrace", []_C_int{1, 81}},
	{"kern.hostid", []_C_int{1, 11}},
	{"kern.hostname", []_C_int{1, 10}},

	{"kern.cp_time", []_C_int{1, 40}},
	{"kern.cp_time2", []_C_int{1, 71}},
	{"kern.cpustats", []_C_int{1, 85}},
	{"kern.domainname", []_C_int{1, 22}},
	{"kern.file", []_C_int{1, 73}},
	{"kern.forkstat", []_C_int{1, 42}},
	{"kern.fscale", []_C_int{1, 46}},
	{"kern.fsync", []_C_int{1, 33}},
	{"kern.global_ptrace", []_C_int{1, 81}},
	{"kern.hostid", []_C_int{1, 11}},
	{"kern.hostname", []_C_int{1, 10}},

	{"kern.cp_time", []_C_int{1, 40}},
	{"kern.cp_time2", []_C_int{1, 71}},
	{"kern.cpustats", []_C_int{1, 85}},
	{"kern.domainname", []_C_int{1, 22}},
	{"kern.file", []_C_int{1, 73}},
	{"kern.forkstat", []_C_int{1, 42}},
	{"kern.fscale", []_C_int{1, 46}},
	{"kern.fsync", []_C_int{1, 33}},
	{"kern.global_ptrace", []_C_int{1, 81}},
	{"kern.hostid", []_C_int{1, 11}},
	{"kern.hostname", []_C_int{1, 10}},