avro::decode not able to handle NULL array. Thows "Incorrect token in the stream. Expected: Array start, found Null"

The serdes CPP code is not able to handle NULL arrays when converting json to avro.

sample excerpt of input json that fails:
,"list1":[{"test1", "test2"}],"list2":null,"listItemCount":0,.........

It bails out at "avro::decode(*json_decoder, *datum);" while handling list2. How can we make decode accept null values which could be valid in some cases. Same question applies to a record that could be null too. Thanks.

static int
Json2Avro(Serdes::Schema *schema, const std::string &json, avro::GenericDatum **datump)
{
avro::ValidSchema *avro_schema = schema->object();

std::istringstream iss(json);
auto json_is = avro::istreamInputStream(iss);
avro::DecoderPtr json_decoder = avro::jsonDecoder(*avro_schema);
avro::GenericDatum *datum = new avro::GenericDatum(*avro_schema);

try {
json_decoder->init(*json_is);
avro::decode(*json_decoder, *datum);
}
catch (const avro::Exception &ex) {
cerr << "JSON to avro transformation failed: " << ex.what() << endl;
return -1;
}

*datump = datum;

return 0;
}

Start at the Json2Avro entry point and inspect how avro::jsonDecoder and avro::decode process list2 when the JSON value is null. Determine the expected behavior for nullable arrays and records, then verify that valid null values no longer fail while existing non-null decoding still works.

Written by the indexing model from the issue text.