Program: 33142
Project: 33142
Buggy source:
protected Object retrieveNavigationProperty(final NavigationProperty property,final Method getter){
  final Class<?> type=getter.getReturnType();
  final Class<?> collItemType;
  if (EntityCollection.class.isAssignableFrom(type)) {
    collItemType=ClassUtils.extractTypeArg(type,EntityCollection.class,ComplexCollection.class);
  }
 else {
    collItemType=type;
  }
  final Object navPropValue;
  URI targetEntitySetURI=CoreUtils.getTargetEntitySetURI(getClient(),property);
  final ClientLink link=((ClientLinked)internal).getNavigationLink(property.name());
  if (link instanceof ClientInlineEntity) {
    navPropValue=ProxyUtils.getEntityProxy(service,((ClientInlineEntity)link).getEntity(),targetEntitySetURI,type,null,false);
  }
 else   if (link instanceof ClientInlineEntitySet) {
    navPropValue=ProxyUtils.getEntityCollectionProxy(service,collItemType,type,targetEntitySetURI,((ClientInlineEntitySet)link).getEntitySet(),targetEntitySetURI,false);
  }
 else {
    final URI targetURI=URIUtils.getURI(getEntityHandler().getEntityURI(),property.name());
    if (EntityCollection.class.isAssignableFrom(type)) {
      navPropValue=ProxyUtils.getEntityCollectionProxy(service,collItemType,type,targetEntitySetURI,null,targetURI,true);
    }
 else     if (AbstractEntitySet.class.isAssignableFrom(type)) {
      navPropValue=ProxyUtils.getEntitySetProxy(service,type,targetURI);
    }
 else {
      final EntityUUID uuid=new EntityUUID(targetEntitySetURI,collItemType,null);
      LOG.debug("String_Node_Str",collItemType.getSimpleName(),null);
      EntityInvocationHandler handler=getContext().entityContext().getEntity(uuid);
      if (handler == null) {
        final ClientEntity entity=getClient().getObjectFactory().newEntity(new FullQualifiedName(collItemType.getAnnotation(Namespace.class).value(),ClassUtils.getEntityTypeName(collItemType)));
        handler=EntityInvocationHandler.getInstance(entity,URIUtils.getURI(this.uri.build(),property.name()),targetEntitySetURI,collItemType,service);
      }
 else       if (getContext().entityContext().getStatus(handler) == AttachedEntityStatus.DELETED) {
        LOG.debug("String_Node_Str",collItemType.getSimpleName(),uuid);
        handler=null;
      }
      navPropValue=handler == null ? null : Proxy.newProxyInstance(Thread.currentThread().getContextClassLoader(),new Class<?>[]{collItemType},handler);
    }
  }
  return navPropValue;
}

Fixed version (ground truth):
protected Object retrieveNavigationProperty(final NavigationProperty property,final Method getter){
  final Class<?> type=getter.getReturnType();
  final Class<?> collItemType;
  if (EntityCollection.class.isAssignableFrom(type)) {
    collItemType=ClassUtils.extractTypeArg(type,EntityCollection.class,ComplexCollection.class);
  }
 else {
    collItemType=type;
  }
  final Object navPropValue;
  URI targetEntitySetURI=CoreUtils.getTargetEntitySetURI(getClient(),property);
  final ClientLink link=((ClientLinked)internal).getNavigationLink(property.name());
  if (link instanceof ClientInlineEntity) {
    navPropValue=ProxyUtils.getEntityProxy(service,((ClientInlineEntity)link).getEntity(),targetEntitySetURI,type,null,false);
  }
 else   if (link instanceof ClientInlineEntitySet) {
    if (AbstractEntitySet.class.isAssignableFrom(type)) {
      navPropValue=ProxyUtils.getEntitySetProxy(service,type,((ClientInlineEntitySet)link).getEntitySet(),targetEntitySetURI,false);
    }
 else {
      navPropValue=ProxyUtils.getEntityCollectionProxy(service,collItemType,type,targetEntitySetURI,((ClientInlineEntitySet)link).getEntitySet(),targetEntitySetURI,false);
    }
  }
 else {
    final URI targetURI=URIUtils.getURI(getEntityHandler().getEntityURI(),property.name());
    if (EntityCollection.class.isAssignableFrom(type)) {
      navPropValue=ProxyUtils.getEntityCollectionProxy(service,collItemType,type,targetEntitySetURI,null,targetURI,true);
    }
 else     if (AbstractEntitySet.class.isAssignableFrom(type)) {
      navPropValue=ProxyUtils.getEntitySetProxy(service,type,targetURI);
    }
 else {
      final EntityUUID uuid=new EntityUUID(targetEntitySetURI,collItemType,null);
      LOG.debug("String_Node_Str",collItemType.getSimpleName(),null);
      EntityInvocationHandler handler=getContext().entityContext().getEntity(uuid);
      if (handler == null) {
        final ClientEntity entity=getClient().getObjectFactory().newEntity(new FullQualifiedName(collItemType.getAnnotation(Namespace.class).value(),ClassUtils.getEntityTypeName(collItemType)));
        handler=EntityInvocationHandler.getInstance(entity,URIUtils.getURI(this.uri.build(),property.name()),targetEntitySetURI,collItemType,service);
      }
 else       if (getContext().entityContext().getStatus(handler) == AttachedEntityStatus.DELETED) {
        LOG.debug("String_Node_Str",collItemType.getSimpleName(),uuid);
        handler=null;
      }
      navPropValue=handler == null ? null : Proxy.newProxyInstance(Thread.currentThread().getContextClassLoader(),new Class<?>[]{collItemType},handler);
    }
  }
  return navPropValue;
}