jsonv2.Marshal with jsonv1.DefaultOptionsV1 not equivalent to jsonv1

[gazerro]

jsonv2.Marshal(in, jsonv1.DefaultOptionsV1()) should be semantically equivalent to jsonv1.Marshal(in), but the former returns an error in the following cases

• a struct has only unexported fields
• an exported field has a non-ignored json tag

Also, the former clears the value when unmarshaling a JSON null into a non-nullable type.

[dsnet]

That is all expected at the moment. We haven't implemented all of the v1 compatibility layer. It will be a gradual process to get to 100% backwards compatibility.

[gazerro]

@dsnet In this case, feel free to close this issue. Thanks.

[dsnet]

Closing as we'll be addressing each v1 feature one-by-one.