Apparently, I have (ByteArray subclasses identityIncludes: CompiledMethod) and: [CompiledMethod superclass ~= ByteArray].So there is a single class, but it is referenced twice.2017-12-01 3:12 GMT+01:00 Nicolas Cellier <nicolas.cellier.aka.nice@gmail.com >:Can you see this too when doing ByteArray browseHierarchy?