message: [tf.data] Patch to unref iterator_resource in DeserializeIteratorOp.
diff: @@ -1051,7 +1051,7 @@ class DeserializeIteratorOp : public OpKernel {
  IteratorResource* iterator_resource;
  OP_REQUIRES_OK(
  ctx, LookupResource(ctx, HandleFromInput(ctx, 0), &iterator_resource));
  -
  + core::ScopedUnref unref_iterator(iterator_resource);
  Variant variant = ctx->input(1).scalar<Variant>()();
  auto* wrapper = variant.get<IteratorStateVariant>();
  OP_REQUIRES(ctx, wrapper != nullptr,
  