Description:
------------
The attached test script causes a segmentation fault in PHP 5.3.3 and the current 
PHP 5.3 snapshot, presumably because count() is not a defined method in 
FooIterator or any of its ancestor classes.

The configure line used to compile the snapshot:

Configure Command =>  './configure'  '--prefix=/home/matt/Software/php5.3-
201008070030/build/php_build' '--without-pear' '--without-sqlite3' '--without-
pdo-sqlite' '--without-sqlite' '--enable-debug'

Test script:
---------------
<?php
class FooIterator extends FilterIterator {
    public function accept() {
        return true;
    }   
}
$iterator = new FooIterator(new ArrayIterator(array(1)));
echo $iterator->count();

Expected result:
----------------
PHP Fatal error:  Call to undefined method FooIterator::count() in test.php on 
line 8

Actual result:
--------------
1Segmentation fault

gdb backtrace:

#0  0x0000000002926cd0 in ?? ()
#1  0x0000000000573929 in spl_dual_it_free (intern=0x2a089f0) at 
/home/matt/Software/php5.3-201008070030/ext/spl/spl_iterators.c:1461
#2  0x0000000000574ebd in spl_dual_it_dtor (_object=0x2a089f0, handle=1) at 
/home/matt/Software/php5.3-201008070030/ext/spl/spl_iterators.c:1942
#3  0x00000000006ebbea in zend_objects_store_del_ref_by_handle_ex (handle=1, 
handlers=0xcace80)
    at /home/matt/Software/php5.3-201008070030/Zend/zend_objects_API.c:206
#4  0x00000000006eba5f in zend_objects_store_del_ref (zobject=0x2a20e30) at 
/home/matt/Software/php5.3-201008070030/Zend/zend_objects_API.c:172
#5  0x00000000006bbca2 in _zval_dtor_func (zvalue=0x2a20e30, 
__zend_filename=0xa4e9a8 "/home/matt/Software/php5.3-
201008070030/Zend/zend_execute_API.c", 
    __zend_lineno=443) at /home/matt/Software/php5.3-
201008070030/Zend/zend_variables.c:52
#6  0x00000000006abbba in _zval_dtor (zvalue=0x2a20e30, __zend_filename=0xa4e9a8 
"/home/matt/Software/php5.3-201008070030/Zend/zend_execute_API.c", 
    __zend_lineno=443) at /home/matt/Software/php5.3-
201008070030/Zend/zend_variables.h:35
#7  0x00000000006acb48 in _zval_ptr_dtor (zval_ptr=0x2a24158, 
__zend_filename=0xa50290 "/home/matt/Software/php5.3-
201008070030/Zend/zend_variables.c", 
    __zend_lineno=178) at /home/matt/Software/php5.3-
201008070030/Zend/zend_execute_API.c:443
#8  0x00000000006bc01f in _zval_ptr_dtor_wrapper (zval_ptr=0x2a24158) at 
/home/matt/Software/php5.3-201008070030/Zend/zend_variables.c:178
#9  0x00000000006ce705 in zend_hash_apply_deleter (ht=0xcc4588, p=0x2a24140) at 
/home/matt/Software/php5.3-201008070030/Zend/zend_hash.c:611
#10 0x00000000006ced8e in zend_hash_reverse_apply (ht=0xcc4588, 
apply_func=0x6ac3f5 <zval_call_destructor>)
    at /home/matt/Software/php5.3-201008070030/Zend/zend_hash.c:760
#11 0x00000000006ac487 in shutdown_destructors () at /home/matt/Software/php5.3-
201008070030/Zend/zend_execute_API.c:226
#12 0x00000000006bd8db in zend_call_destructors () at 
/home/matt/Software/php5.3-201008070030/Zend/zend.c:874
#13 0x0000000000647cec in php_request_shutdown (dummy=0x0) at 
/home/matt/Software/php5.3-201008070030/main/main.c:1587
#14 0x00000000007a27db in main (argc=2, argv=0x7fffd4f78e68) at 
/home/matt/Software/php5.3-201008070030/sapi/cli/php_cli.c:1373