IllegalStateException when groupByCommit called after compare

[s-r-whittaker]

After a compare I expected to be able to call pretty print on the Changes, instead an exception is seen
...

Steps To Reproduce
I have a runnable test case which isolates the bug and allows Javers Core Team to easily reproduce it.
It is tiny so included below:

    public static class MyClass{
        String value;
        public MyClass(String value){
            this.value = value;
        }
    }

    public static void main(String[] args) {
        final Javers javers = JaversBuilder.javers().build();
        final Diff diff = javers.compare(new MyClass("abc"), new MyClass("cde"));
        diff.getChanges().prettyPrint();
    }

Javers' Version
Tested on 6.4.1 and 5.14.0

[bartoszwalacik]

thanks for reporting

[bartoszwalacik]

fixed in 6.5.2