message: Raise error when unable to parse VariantTensorDataProto in BundleReader.
diff: @@ -144,7 +144,11 @@ Status ReadVariantTensor(io::InputBuffer* buffered_file, Tensor* ret,
  buffered_file->ReadNBytes(string_length, &buffer[0], &bytes_read));
  *actual_crc32c = crc32c::Extend(*actual_crc32c, buffer.data(), bytes_read);
  VariantTensorDataProto proto;
  - proto.ParseFromString(buffer);
  + if (!proto.ParseFromString(buffer)) {
  + return errors::DataLoss("Unable to parse VariantTensorDataProto from ",
  + "buffer of size ", string_length, ". ",
  + "Bundle entry offset: ", offset, " size: ", size);
  + }
  Variant v = proto;
  if (!DecodeUnaryVariant(&v)) {
  return errors::Internal("Could not decode variant with type_name: \"",
  