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In TensorArrayPackOrGatherOp, when num == 0, look for static shape also in the TensorArray object. #13

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In TensorArrayPackOrGatherOp, when num == 0, look for static shape also in the TensorArray object. #13

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15 changes: 12 additions & 3 deletions tensorflow/core/kernels/tensor_array_ops.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -597,15 +597,24 @@ class TensorArrayPackOrGatherOp : public OpKernel {
// If there are no elements to return, return a zero-element Tensor with
// shape [0] + element_shape_
if (num_indices == 0) {
OP_REQUIRES(ctx, element_shape_.IsFullyDefined(),
PartialTensorShape partial_empty_shape;
OP_REQUIRES(ctx, element_shape_.MergeWith(tensor_array->ElemShape(),
&partial_empty_shape).ok(),
errors::InvalidArgument(
"Attr element shape ", element_shape_.DebugString(),
" is not compatible with TensorArray element shape ",
tensor_array->ElemShape().DebugString()));

OP_REQUIRES(ctx, partial_empty_shape.OsFullyDefined(),
errors::Unimplemented(
"TensorArray has size zero, but element shape ",
element_shape_.DebugString(),
partial_empty_shape.DebugString(),
" is not fully defined. "
"Currently only static shapes are supported when packing "
"zero-size TensorArrays."));

TensorShape empty_shape;
element_shape_.AsTensorShape(&empty_shape);
partial_empty_shape.AsTensorShape(&empty_shape);
empty_shape.InsertDim(0, 0);
Tensor* empty_unused;
OP_REQUIRES_OK(ctx, ctx->allocate_output(0, empty_shape, &empty_unused));
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