Deserialize from json

[renemeuselwitz]

Hi,

when serailizing and deserializing Diffs of objects, I'm having some trouble:

Let's assume the following:

`

   Item val1 = new Item();
    Item val2 = new Item();
    val1.setId(1234);
    val2.setId(5678);

    Javers javers = JaversBuilder.javers().build();
    Diff diff = javers.compare(val1, val2);

    String json = javers.getJsonConverter().toJson(diff); // until here it works

    Diff javersDiff = javers.getJsonConverter().fromJson(json , Diff.class); // here it crashes

`

I'm getting a "java.lang.IllegalArgumentException: argument should not be null" Exception. Debugging further into it gives me a
"Method threw 'java.lang.IllegalArgumentException' exception. Cannot evaluate org.javers.core.diff.Diff.toString()"

Any way to actually nicely deserialize my values again as Diff?

Thanks,

[renemeuselwitz]

PS: I am using version 3.11.5.

I also rolled back, and the code works like a charm for version.

Seems like it stopped working somewhen in version 3.8. Still works for my with old versions until 3.7.9

[bartoszwalacik]

@rene try to submit a PR with a fix, we will merge

[bartoszwalacik]

fix released in 3.12.1