Null Array item causes failure

[Feiyizhan]

I have an object with a field that is a Array. If the Array contains an entry that is null, then I get the following exception:

java.lang.IllegalArgumentException: argument should not be null
    at org.javers.common.validation.Validate.argumentsAreNotNull(Validate.java:33)
    at org.javers.core.metamodel.object.GlobalIdFactory.createId(GlobalIdFactory.java:44)
    at org.javers.core.graph.LiveCdoFactory.create(LiveCdoFactory.java:29)
    at org.javers.core.graph.LiveCdoFactory.create(LiveCdoFactory.java:15)
    at org.javers.core.graph.EdgeBuilder$MultiEdgeContainerBuilderFunction.apply(EdgeBuilder.java:72)
    at org.javers.core.metamodel.type.ListType.map(ListType.java:33)

This issue is similar to #676。

[bartoszwalacik]

Please provide a failing test case (like these https://github.com/javers/javers/tree/master/javers-core/src/test/groovy/org/javers/core/cases)
Does the error still exists in 5.2.5? We did some improvements in this area.

[KevinXu2014]

same problem here, basically Javers.compare(null, something new)

it should say, something new added, but Javers threw 'java.lang.IllegalArgumentException' exception.

[bartoszwalacik]

fixed in 5.3.1