message: BUG: fix -1 index
diff: @@ -939,6 +939,11 @@ class _OneHotColumn(
  weighted_column = sparse_ops.sparse_merge(sp_ids=sparse_id_column,
  sp_values=weight_tensor,
  vocab_size=self.length)
  + # Remove -1 index
  + weighted_column = sparse_ops.sparse_slice(
  + weighted_column,
  + [0, 0],
  + weighted_column.dense_shape)
  return sparse_ops.sparse_tensor_to_dense(weighted_column)
  dense_id_tensor = sparse_ops.sparse_tensor_to_dense(sparse_id_column,
  