Swift for TensorFlow `error: Couldn' t 查找符号 : type metadata accessor for TensorFlow. Tensor`

Question

以下几行 -

import TensorFlow
let matrix = Tensor<Float>([[1, 2], [3, 4]])

在 macOS Playground 中执行会产生错误 -

error: Couldn't lookup symbols:
  type metadata accessor for TensorFlow.Tensor
  protocol witness table for TensorFlow.Tensor<A> : TensorFlow.TensorArrayProtocol in TensorFlow
  type metadata accessor for TensorFlow.TensorElementLiteral
  protocol witness table for TensorFlow.TensorElementLiteral<A> : TensorFlow.TensorArrayProtocol in TensorFlow
  protocol conformance descriptor for <A where A: TensorFlow.TensorArrayProtocol> Swift.Array<A> : TensorFlow.TensorArrayProtocol in TensorFlow
  protocol witness table for Swift.Float : TensorFlow.TensorFlowScalar in TensorFlow
  _TFE_DeleteOp
  _TFE_NewOp
  _TFE_OpSetAttrInt
  _TFE_OpSetAttrType
  _TF_DeleteStatus
  _TF_NewStatus
  ___tf_tensor_from_scalar
  __swift_tfc_CheckOk
  __swift_tfc_CreateTensorHandleFromC
  __swift_tfc_EagerExecute
  __swift_tfc_GetGlobalEagerContext
  __swift_tfc_OpAddInputFromTensorGroup
  __swift_tfc_OpSetDeviceFromScope

Xcode 10.2、Swift for TensorFlow 版本 0.2，2019-03-02

关于如何解决这个问题有什么想法吗？

附注0.3、2019-04-23 工具链也存在此问题。

Answer 1

好吧，这似乎是一个已知问题 - https://github.com/tensorflow/swift/issues/173