Program: 61742
Project: 61742
Buggy source:
public int typeName(SourceGeneratorLocalData localData,GraphTargetItem type) throws CompilationException {
  if (type instanceof UnboundedTypeItem) {
    return 0;
  }
  if (type instanceof UnresolvedAVM2Item) {
    type=((UnresolvedAVM2Item)type).resolve(new ArrayList<GraphTargetItem>(),new ArrayList<String>(),abc,allABCs,new ArrayList<MethodBody>(),new ArrayList<AssignableAVM2Item>());
  }
  String pkg="String_Node_Str";
  String name=type.toString();
  if ("String_Node_Str".equals(name)) {
    return 0;
  }
  TypeItem nameItem=(TypeItem)type;
  name=nameItem.fullTypeName;
  if (name.contains("String_Node_Str")) {
    pkg=name.substring(0,name.lastIndexOf('.'));
    name=name.substring(name.lastIndexOf('.') + 1);
  }
  if (!nameItem.subtypes.isEmpty()) {
    List<Integer> params=new ArrayList<>();
    for (    String p : nameItem.subtypes) {
      String ppkg="String_Node_Str";
      if (p.contains("String_Node_Str")) {
        ppkg=p.substring(0,p.lastIndexOf('.'));
        p=p.substring(p.lastIndexOf('.') + 1);
      }
      params.add(abc.constants.getMultinameId(new Multiname(Multiname.QNAME,str(p),namespace(Namespace.KIND_PACKAGE,ppkg),0,0,new ArrayList<Integer>()),true));
    }
    int qname=abc.constants.getMultinameId(new Multiname(Multiname.QNAME,str(name),namespace(Namespace.KIND_PACKAGE,pkg),0,0,new ArrayList<Integer>()),true);
    return abc.constants.getMultinameId(new Multiname(Multiname.TYPENAME,0,0,0,qname,params),true);
  }
 else {
    return abc.constants.getMultinameId(new Multiname(Multiname.QNAME,str(name),namespace(Namespace.KIND_PACKAGE,pkg),0,0,new ArrayList<Integer>()),true);
  }
}

Fixed version (ground truth):
public int typeName(SourceGeneratorLocalData localData,GraphTargetItem type) throws CompilationException {
  if (type instanceof UnboundedTypeItem) {
    return 0;
  }
  if (type instanceof UnresolvedAVM2Item) {
    String fullClass=localData.currentClass == null ? null : (localData.pkg.equals("String_Node_Str") ? localData.currentClass : localData.pkg + "String_Node_Str" + localData.currentClass);
    type=((UnresolvedAVM2Item)type).resolve(new TypeItem(fullClass),new ArrayList<GraphTargetItem>(),new ArrayList<String>(),abc,allABCs,new ArrayList<MethodBody>(),new ArrayList<AssignableAVM2Item>());
  }
  String pkg="String_Node_Str";
  String name=type.toString();
  if ("String_Node_Str".equals(name)) {
    return 0;
  }
  TypeItem nameItem=(TypeItem)type;
  name=nameItem.fullTypeName;
  if (name.contains("String_Node_Str")) {
    pkg=name.substring(0,name.lastIndexOf('.'));
    name=name.substring(name.lastIndexOf('.') + 1);
  }
  if (!nameItem.subtypes.isEmpty()) {
    List<Integer> params=new ArrayList<>();
    for (    String p : nameItem.subtypes) {
      String ppkg="String_Node_Str";
      if (p.contains("String_Node_Str")) {
        ppkg=p.substring(0,p.lastIndexOf('.'));
        p=p.substring(p.lastIndexOf('.') + 1);
      }
      params.add(abc.constants.getMultinameId(new Multiname(Multiname.QNAME,str(p),namespace(Namespace.KIND_PACKAGE,ppkg),0,0,new ArrayList<Integer>()),true));
    }
    int qname=abc.constants.getMultinameId(new Multiname(Multiname.QNAME,str(name),namespace(Namespace.KIND_PACKAGE,pkg),0,0,new ArrayList<Integer>()),true);
    return abc.constants.getMultinameId(new Multiname(Multiname.TYPENAME,0,0,0,qname,params),true);
  }
 else {
    return abc.constants.getMultinameId(new Multiname(Multiname.QNAME,str(name),namespace(Namespace.KIND_PACKAGE,pkg),0,0,new ArrayList<Integer>()),true);
  }
}