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Bug #26266 Concatenating overloaded objects causes crash
Submitted: 2003-11-15 15:08 UTC Modified: 2003-12-01 13:07 UTC
Votes:1
Avg. Score:5.0 ± 0.0
Reproduced:1 of 1 (100.0%)
Same Version:1 (100.0%)
Same OS:1 (100.0%)
From: adam at trachtenberg dot com Assigned:
Status: Closed Package: Scripting Engine problem
PHP Version: 5CVS-2003-11-15 (dev) OS: Mac OS X 10.3
Private report: No CVE-ID: None
View Developer Edit
 [2003-11-15 15:08 UTC] adam at trachtenberg dot com 
Description:
------------
Concatenating objects that define a __toString() method 
using the "." operator causes a bus error.

Reproduce code:
---------------
class foo {
    function __toString() {
        return "foo";
    }
}

$foo = new foo;
echo $foo . "\n";

Expected result:
----------------
foo

Actual result:
--------------
Bus error.

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 [2003-11-25 14:52 UTC] sniper@php.net 
Doesn't crash with latest CVS.
 [2003-11-25 16:06 UTC] adam at trachtenberg dot com 
Just updated to the latest CVS and it's still broken on 
my machine.

[adam@benlev:~/Documents/php/php5] $ php -v
PHP 5.0.0b3-dev (cli) (built: Nov 25 2003 15:56:32) 
(DEBUG)
Copyright (c) 1997-2003 The PHP Group
Zend Engine v2.0.0-dev, Copyright (c) 1998-2003 Zend 
Technologies
 [2003-11-28 23:51 UTC] sniper@php.net 
Nope doesn't crash with the provided example script (on linux)
No leaks, nothing. Can you provide a GDB backtrace of the crash?
 [2003-11-29 12:20 UTC] adam at trachtenberg dot com 
This is what I get from gdb:

Core was generated by `/Users/adam/CVS/php/php-src/sapi/
cli/php'.
#0  0x0022e2c4 in ns_default.2 ()
(gdb) bt
#0  0x0022e2c4 in ns_default.2 ()
#1  0x0022e214 in ns_default.2 ()
#2  0x0022a4dc in ns_default.2 ()
#3  0x00260b3c in zend_concat_handler 
(execute_data=0x22a4dc, op_array=0x26d35c) at /Users/
adam/CVS/php/php-src/Zend/zend_execute.c:1359
#4  0x0026020c in execute (op_array=0xb11750) at /Users/
adam/CVS/php/php-src/Zend/zend_execute.c:1269
#5  0x00231300 in ns_default.2 ()
#6  0x001d4f20 in ns_default.2 ()
#7  0x00273124 in main (argc=2353640, argv=0xe) at /
Users/adam/CVS/php/php-src/sapi/cli/php_cli.c:910
 [2003-12-01 11:48 UTC] sniper@php.net 
Please try using this CVS snapshot:

  http://snaps.php.net/php5-latest.tar.gz
 
For Windows:
 
  http://snaps.php.net/win32/php5-win32-latest.zip

Oops..misclicked the quickfix.. :) Of course I meant the PHP 5 snapshot.. :)
 [2003-12-01 13:07 UTC] adam at trachtenberg dot com 
That works. Something much be messy with my CVS. Sorry.

I was wondering about the PHP 4 snap, but you did say 
"Yes, really, use the snapshot," so I followed along. :)
 
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