Bug #73684 [Opn->Nab]: Can be segmentation fault
Edit report at https://bugs.php.net/bug.php?id=73684&edit=1
ID: 73684
Updated by: cmb@php.net
Reported by: deepvavar at mail dot ru
Summary: Can be segmentation fault
-Status: Open
+Status: Not a bug
Type: Bug
-Package: *General Issues
+Package: Scripting Engine problem
Operating System: All
PHP Version: Irrelevant
-Assigned To:
+Assigned To: cmb
Block user comment: N
Private report: N
New Comment:
Thank you for taking the time to write to us, but this is not
a bug. Please double-check the documentation available at
http://www.php.net/manual/ and the instructions on how to
report
a bug at http://bugs.php.net/how-to-report.php
public static function bar($b)
{
$b->b = self::$a->getNewB();
self::bar($b->b);
}
causes infinite recursion, what is considered to be a programming error[1]. The fact that the script
terminates differently is caused by different settings. On your Windows PHP 5.4 there is Xdebug
enabled, for instance.
[1] <http://php.net/manual/en/functions.user-defined.php#example-130>
Previous Comments:
------------------------------------------------------------------------
[2016-12-08 11:58:24] deepvavar at mail dot ru
Description:
------------
Can be segmentation fault
Test script:
---------------
<?php
class a
{
public function getNewB()
{
$b = new b();
$b->a = $this;
return $b;
}
}
class b
{
public $a = null;
public $b = null;
}
class x
{
public static $a = null;
public static $b = null;
public static function foo()
{
self::$a = new a();
self::$b = self::$a->getNewB();
self::bar(self::$b);
}
public static function bar($b)
{
$b->b = self::$a->getNewB();
self::bar($b->b);
}
}
x::foo();
Expected result:
----------------
Without segfault
Actual result:
--------------
~$ php test.php
Segmentation fault
~$ php -v
PHP 5.6.22-0+deb8u1 (cli) (built: Jun 13 2016 07:55:54)
Copyright (c) 1997-2016 The PHP Group
Zend Engine v2.6.0, Copyright (c) 1998-2016 Zend Technologies
with Zend OPcache v7.0.6-dev, Copyright (c) 1999-2016, by Zend Technologies
~$ cat /etc/debian_version
8.5
------------------------------------------
Fatal error: Maximum function nesting level of '100' reached, aborting!
Windows, php 5.4
------------------------------------------
> php test.php
fish: âphp test.phpâ terminated by signal SIGSEGV (Address boundary error)
> php -version
PHP 5.6.28 (cli) (built: Nov 9 2016 07:56:15)
Copyright (c) 1997-2016 The PHP Group
Zend Engine v2.6.0, Copyright (c) 1998-2016 Zend Technologies
------------------------------------------
# php t.php
Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 130968 bytes) in
/t.php on line 29
# php -v
PHP 5.6.28 (cli) (built: Dec 6 2016 22:12:29)
Copyright (c) 1997-2016 The PHP Group
Zend Engine v2.6.0, Copyright (c) 1998-2016 Zend Technologies
With php 7.1: Fatal error: Allowed memory size
------------------------------------------
~$ php test.php
Segmentation fault
~$ php -v
PHP 7.0.13-2 (cli) ( NTS )
Copyright (c) 1997-2016 The PHP Group
Zend Engine v3.0.0, Copyright (c) 1998-2016 Zend Technologies
with Zend OPcache v7.0.13-2, Copyright (c) 1999-2016, by Zend Technologies
------------------------------------------
$ php test.php
Segmentation fault
$ php -v
PHP 7.0.8-0ubuntu0.16.04.3 (cli) ( NTS )
Copyright (c) 1997-2016 The PHP Group
Zend Engine v3.0.0, Copyright (c) 1998-2016 Zend Technologies
with Zend OPcache v7.0.8-0ubuntu0.16.04.3, Copyright (c) 1999-2016, by Zend Technologies
------------------------------------------------------------------------
--
Edit this bug report at https://bugs.php.net/bug.php?id=73684&edit=1
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