NPE when converting ClinVar XSD file

[holtgrewe]

Using this XSD file

• https://ftp.ncbi.nlm.nih.gov/pub/clinvar/xsd_public/ClinVar_VCV_weekly.xsd

I get the following error with v1.92

> java -jar schema2proto-lib-1.92.jar ClinVar_VCV_weekly.xsd --outputDirectory xs
[main] INFO no.entur.schema2proto.generateproto.Schema2Proto - Starting to parse ClinVar_VCV_weekly.xsd
[main] INFO no.entur.schema2proto.generateproto.ProtoSerializer - Writing proto files to /home/holtgrem_c/Downloads/xs
[main] ERROR no.entur.schema2proto.generateproto.Schema2Proto - Error processing proto files: null
java.lang.NullPointerException
        at no.entur.schema2proto.generateproto.ProtoSerializer.lambda$moveReusedLocalTypesToGlobal$28(ProtoSerializer.java:1246)
        at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:176)
        at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1655)
        at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484)
        at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)
        at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:913)
        at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
        at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:578)
        at no.entur.schema2proto.generateproto.ProtoSerializer.moveReusedLocalTypesToGlobal(ProtoSerializer.java:1246)
        at no.entur.schema2proto.generateproto.ProtoSerializer.serialize(ProtoSerializer.java:136)
        at no.entur.schema2proto.generateproto.Schema2Proto.parseAndSerialize(Schema2Proto.java:118)
        at no.entur.schema2proto.generateproto.Schema2Proto.<init>(Schema2Proto.java:98)
        at no.entur.schema2proto.generateproto.Schema2Proto.main(Schema2Proto.java:131)