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Bug #24710 $obj->foo = "bar"; print $obj->{0}; segfaults
Submitted: 2003-07-18 17:28 UTC Modified: 2003-07-22 12:21 UTC
From: swalk at prp dot physik dot tu-darmstadt dot de Assigned:
Status: Closed Package: Scripting Engine problem
PHP Version: 4.3.3RC2-dev OS: *
Private report: No CVE-ID: None
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 [2003-07-18 17:28 UTC] swalk at prp dot physik dot tu-darmstadt dot de 
Description:
------------
This little script creates a segfault on every version of php i came across (4.3.2, 4.3.3rc1, 5.0.0b2). When you replace 0 with "0", it works.


Reproduce code:
---------------
<?php
$obj->foo = "bar"; // or anything else that creates an object
print $obj->{0};
?>


Expected result:
----------------
Notice: undefined property: 0... or something alike

Actual result:
--------------
(gdb) bt
#0  0x08146cf8 in zend_hash_find (ht=0x8211f64, arKey=0x0, nKeyLength=4, pData=0xbfffca9c)
    at /home/et/sources/php-4.3.2/Zend/zend_hash.c:875
#1  0x08151e70 in zend_fetch_property_address_inner (ht=0x8211f64, op2=0x8219910, Ts=0xbfffcb40, type=0)
    at /home/et/sources/php-4.3.2/Zend/zend_execute.c:199
#2  0x0814c6b9 in zend_fetch_property_address (result=0x82198f0, op1=0x8215244, op2=0x8219910, Ts=0xbfffcb40, type=0)
    at /home/et/sources/php-4.3.2/Zend/zend_execute.c:930
#3  0x08150e97 in execute (op_array=0x82156a4) at /home/et/sources/php-4.3.2/Zend/zend_execute.c:1328
#4  0x081426f1 in zend_execute_scripts (type=8, retval=0x0, file_count=3) at /home/et/sources/php-4.3.2/Zend/zend.c:869
#5  0x0811d2fb in php_execute_script (primary_file=0xbffff070) at /home/et/sources/php-4.3.2/main/main.c:1671
#6  0x08153932 in main (argc=4, argv=0xbffff0f4) at /home/et/sources/php-4.3.2/sapi/cli/php_cli.c:806
#7  0x420158f7 in __libc_start_main () from /lib/i686/libc.so.6

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AllCommentsChangesGit/SVN commitsRelated reports
 [2003-07-19 09:40 UTC] sniper@php.net 
Verified with latest PHP_4_3 CVS, same backtrace. (removed all the irrelevant comments, they didn't have any extra value to them)
 [2003-07-22 12:21 UTC] zeev@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
grab the snapshot at http://snaps.php.net/.
 
In case this was a documentation problem, the fix will show up soon at
http://www.php.net/manual/.

In case this was a PHP.net website problem, the change will show
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Thank you for the report, and for helping us make PHP better.

(Will be a part of 4.3.3)
 
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