while using modules loaded with dl() I notice that the module shutdown runs before calling any registered list destructors. The module shutdown removes the destructor buckets from the destructors list.

This results in the error log:

Unknown list entry type in request shutdown (19) in Unknown on line 0

The list destructor is not called. The Code works in the former PHP3 Module and I can't see a major
difference to the code in ext/standard/dir.c.

Here is the code:

static int le_http;

static void http_destructor(php_http_request *preq)
{
...
}

PHP_MINIT_FUNCTION(http_init)
{
...
le_http = register_list_destructors(http_destructor,NULL);
...
}

DLEXPORT PHP_FUNCTION(http)
{
php_http_request *preq;
int handle;
...
preq = ...
handle = zend_list_insert(preq, le_http);

object_init_ex (return_value, http_class_entry_ptr);
add_property_resource (return_value, "handle", handle);
}