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Bug #65867 Countable interface infinite recursion.
Submitted: 2013-10-09 04:44 UTC Modified: 2013-10-09 13:14 UTC
From: kakserpompoyaitsam at gmail dot com Assigned:
Status: Wont fix Package: SPL related
PHP Version: 5.5.4 OS: Irrelevant
Private report: No CVE-ID: None
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 [2013-10-09 04:44 UTC] kakserpompoyaitsam at gmail dot com
Description:
------------
Easy reproducible segmentation fault.
It seems that count($this) doesn't check recursion. I think that count($this) should check if it is called inside of $this->count(), and if so, should ignore the Countable interface and just count the properties. Use case: if your object got special properties that you do not want to count, you can use something liek that: "function count() {return count($this) - numberOfSpecialProperties;}" 

Test script:
---------------
class A implements Countable {function count() {return count($this);}} count(new A);

Expected result:
----------------
0

Actual result:
--------------
Segmentation fault.

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 [2013-10-09 04:46 UTC] kakserpompoyaitsam at gmail dot com
-Summary: strace php -r 'class A implements Countable {function count() {return count($th +Summary: Countable interface infinite recursion.
 [2013-10-09 04:46 UTC] kakserpompoyaitsam at gmail dot com
Changed title.
 [2013-10-09 13:14 UTC] johannes@php.net
-Status: Open +Status: Wont fix
 [2013-10-09 13:14 UTC] johannes@php.net
You can get the count via count((array)$this) or reflection, we won't add a special rule to count itself. We try to minimize bad effects of recursion where we can in a good way.
 
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