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Bug #24884 calling $this->__clone(); crashes php
Submitted: 2003-07-31 09:40 UTC Modified: 2003-08-04 04:11 UTC
From: auroraeosrose at hotmail dot com Assigned:
Status: Closed Package: Scripting Engine problem
PHP Version: 5CVS-2003-08-02 (dev) OS: *
Private report: No CVE-ID: None
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 [2003-07-31 09:40 UTC] auroraeosrose at hotmail dot com 
Description:
------------
calling $this->__clone(); inside a class crashes php

Latest CVS snapshot, apache 2 filter, gd, mbstring, and mysql dlls

Reason for calling it is attempting to create a backward compatible solution for cloning objects without a 5 ini setting change or seperate 4 and 5 codebases

Reproduce code:
---------------
<?php
class Test {
	function __copy()
	{
		$string = PHP_VERSION;
		$version = $string{0};
		if($string < 5)
		{
			return $this;
		}
		else
		{
			return $this->__clone();
		}
	}
}
$test = new Test();
$test2 = $test->__copy();
?>

Expected result:
----------------
If using php4, a copy of the object will be returned, if using php5, the current object should be cloned and returned.

Actual result:
--------------
php and apache die
actually calling $this->__clone(); anywhere in a class crashes

Patches

Pull Requests

History

AllCommentsChangesGit/SVN commitsRelated reports
 [2003-08-01 20:48 UTC] sniper@php.net 
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 1024 (runnable)]
0x8381fd4 in zend_clone_handler (execute_data=0xbfffd1ec, op_array=0x41c760b0)
    at /usr/src/web/php/php5/Zend/zend_execute.c:3042
3042            if (Z_TYPE_P(obj) != IS_OBJECT) {
(gdb) bt
#0  0x8381fd4 in zend_clone_handler (execute_data=0xbfffd1ec, op_array=0x41c760b0)
    at /usr/src/web/php/php5/Zend/zend_execute.c:3042
#1  0x837b22b in execute (op_array=0x41c760b0) at /usr/src/web/php/php5/Zend/zend_execute.c:1199
#2  0x8380278 in zend_do_fcall_common_helper (execute_data=0xbfffd4dc, op_array=0x41c72d60)
    at /usr/src/web/php/php5/Zend/zend_execute.c:2529
#3  0x83806ee in zend_do_fcall_by_name_handler (execute_data=0xbfffd4dc, op_array=0x41c72d60)
    at /usr/src/web/php/php5/Zend/zend_execute.c:2602
#4  0x837b22b in execute (op_array=0x41c72d60) at /usr/src/web/php/php5/Zend/zend_execute.c:1199
#5  0x835a174 in zend_execute_scripts (type=8, retval=0x0, file_count=3) at /usr/src/web/php/php5/Zend/zend.c:1032
#6  0x8313b6e in php_execute_script (primary_file=0xbffff870) at /usr/src/web/php/php5/main/main.c:1573
#7  0x83959df in main (argc=3, argv=0xbffff8e4) at /usr/src/web/php/php5/sapi/cli/php_cli.c:910
#8  0x4055b9cb in __libc_start_main (main=0x8394c04 <main>, argc=3, argv=0xbffff8e4, init=0x80b5b6c <_init>, 
    fini=0x84f3f94 <_fini>, rtld_fini=0x4000aea0 <_dl_fini>, stack_end=0xbffff8dc)
    at ../sysdeps/generic/libc-start.c:92
 [2003-08-04 04:11 UTC] stas@php.net 
This bug has been fixed in CVS.

In case this was a PHP problem, snapshots of the sources are packaged
every three hours; this change will be in the next snapshot. You can
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