get_properties VS ce.default_properties

Hi, I started to refactor my ZE1 code and now I use ( I think correctly ) ZE2 object handlers. As you suggested I try to read , understand and follow zip and swish pecl extensions' code. However I get few issues: If I follow swish convention I can not get derived class properties returned by get_properties hook. Adding ( zip's way ) : zend_hash_copy(int->zo.properties, &class_type->default_properties, (copy_ctor_func_t) zval_add_ref, (void *) &tmp, sizeof(zval *)); seems to solve this problem. But as Antony already explained it's not propper way of doing this. The only problem I have no idea how to resolve is derived class' constructor which overwrites base class' one. Zip extension doesn't define explicit constructor, and swish extension segfaults when I try to create new Swish instance or derived class' one. The same segfault ( well, segfault at all ) is triggered by derived class' constructor in my code. backtrace is useless here: Program received signal SIGSEGV, Segmentation fault. [Switching to Thread -1215612384 (LWP 18388)] 0x00000048 in ?? () (gdb) bt #0 0x00000048 in ?? () (gdb) bt full #0 0x00000048 in ?? () No symbol table info available. I think segfault is related to zend_objects_store_put , but I have no idea if ce->create_object is inherited by derived class or no. Piotras