    java.lang.ClassCastException: class org.hl7.fhir.r5.comparison.ResourceComparer$PlaceHolderComparison cannot be cast to class org.hl7.fhir.r5.comparison.StructureDefinitionComparer$ProfileComparison (org.hl7.fhir.r5.comparison.ResourceComparer$PlaceHolderComparison and org.hl7.fhir.r5.comparison.StructureDefinitionComparer$ProfileComparison are in unnamed module of loader 'app')
    	at org.hl7.fhir.r5.comparison.StructureDefinitionComparer.intersectTypes(StructureDefinitionComparer.java:1072)
    	at org.hl7.fhir.r5.comparison.StructureDefinitionComparer.compareElements(StructureDefinitionComparer.java:281)
    	at org.hl7.fhir.r5.comparison.StructureDefinitionComparer.compareChildren(StructureDefinitionComparer.java:384)
    	at org.hl7.fhir.r5.comparison.StructureDefinitionComparer.compareElements(StructureDefinitionComparer.java:297)
    	at org.hl7.fhir.r5.comparison.StructureDefinitionComparer.compare(StructureDefinitionComparer.java:175)
    	at org.hl7.fhir.r5.comparison.ComparisonSession.compare(ComparisonSession.java:107)
    	at org.hl7.fhir.igtools.publisher.comparators.PreviousVersionComparator.finishChecks(PreviousVersionComparator.java:266)
    	at org.hl7.fhir.igtools.publisher.Publisher.checkConformanceResources(Publisher.java:6652)
    	at org.hl7.fhir.igtools.publisher.Publisher.loadConformance2(Publisher.java:6435)
    	at org.hl7.fhir.igtools.publisher.Publisher.createIg(Publisher.java:1171)
    	at org.hl7.fhir.igtools.publisher.Publisher.execute(Publisher.java:1026)
    	at org.hl7.fhir.igtools.publisher.Publisher.main(Publisher.java:15790)