sdkmanager 'cmake;3.18.1'; \
    sdkmanager 'cmake;3.22.1'; \
    sdkmanager 'cmake;3.6.4111459'; \
    sdkmanager 'emulator'; \
    sdkmanager 'system-images;android-27;google_apis;x86'; \
    sdkmanager 'sources;android-27'; \
    sdkmanager 'extras;google;Android_Emulator_Hypervisor_Driver'; \
    sdkmanager 'extras;google;auto'; \
    sdkmanager 'extras;google;google_play_services'; \
    sdkmanager 'extras;google;instantapps'; \

  CHECK(tensorflow::protobuf::TextFormat::ParseFromString(
      "    signature {"
      "      name: 'AddVariablesFunction'"
      "      input_arg {"
      "        name: 'var'"
      "        type: DT_RESOURCE"
      "      }"
      "      output_arg {"
      "        name: 'sum'"
      "        type: DT_FLOAT"
      "      }"
      "    }"
      "    node_def {"
      "      name: 'read0'"

  export -p | grep TFCI > "$FROM_ENV"

  # Source the default ci values
  source ./ci/official/envs/ci_default

  # TODO(angerson) write this documentation
  # Sources every env, in order, from the comma-separated list "TFCI"
  # Assumes variables will resolve themselves correctly.
  set +u
  for env_file in ${TFCI//,/ }; do
    source "./ci/official/envs/$env_file"
  done
  set -u

  tape.RecordOperation(inputs, {neg_output}, nullptr, "Neg");
  return tape.ComputeGradient(ctx,
                              /*targets=*/{neg_output},
                              /*sources=*/inputs,
                              /*output_gradients=*/{}, outputs);
}

TEST_P(CppGradients, TestRecordOperationWithNullGradientFunctionRaises) {
  std::unique_ptr<TF_Status, decltype(&TF_DeleteStatus)> status(