When fixing JDK-8343427, an external class name (e.g. pkg1.Foo) was used when calling ClassLoader.getResourceAsByteArray(String name). The API expects an internal class name (e.g. pkg1/Foo) and returns a null byte array if it can't find the resource. This in turns will trigger the following assert in FileMapInfo::get_stream_from_class_loader():

assert(obj != nullptr, "ClassLoader.getResourceAsByteArray should not return null");