php.net |  support |  documentation |  report a bug |  advanced search |  search howto |  statistics |  random bug |  login
Bug #78598 Changing array during undef index RW error segfaults
Submitted: 2019-09-26 10:44 UTC Modified: -
From: nikic@php.net Assigned:
Status: Open Package: Scripting Engine problem
PHP Version: 7.2.22 OS:
Private report: No CVE-ID: None
Have you experienced this issue?
Rate the importance of this bug to you:

 [2019-09-26 10:44 UTC] nikic@php.net
Description:
------------
After the undef index notice is thrown, we still assume that the variable is an array, even though the type might have changed in the meantime.

Not really sure what we can do about this, especially when we're dealing with a deeply nested array that has been destroyed.

Test script:
---------------
<?php
$my_var = null;
set_error_handler(function() use(&$my_var) {
    $my_var = 0;
});
$my_var[0] .= "xyz";


Actual result:
--------------
php: /home/nikic/php-7.2/Zend/zend_hash.c:712: _zend_hash_index_add_or_update_i: Assertion `((ht)->gc.refcount == 1) || ((ht)->u.flags & (1<<6))' failed.
Aborted
nikic@MUNIT-271:~/php-7.2$ vim t036.php 


Patches

Add a Patch

Pull Requests

Add a Pull Request

 
PHP Copyright © 2001-2019 The PHP Group
All rights reserved.
Last updated: Sun Nov 17 14:01:40 2019 UTC