#47522 [NEW]: __toString() segfault

From: Date: Fri, 27 Feb 2009 18:52:36 +0000
Subject: #47522 [NEW]: __toString() segfault
Groups: php.bugs 
Request: Send a blank email to php-bugs+get-134256@lists.php.net to get a copy of this message 
From:             ms419 at freezone dot co dot uk
Operating system: Debian
PHP version:      5.2CVS-2009-02-27 (snap)
PHP Bug Type:     Reproducible crash
Bug description:  __toString() segfault

Description:
------------
http://cgi.sfu.ca/~jdbates/tmp/php/200902270/core

I am experiencing a reproducible segfault. I experience it with PHP 5.2.4
and 5.2.6.

The segfault occurs at this expression: strlen($repository) where
$repository is an object with a __toString() method.

By substituting this expression, the segfault does not occur:
strlen($repository->__toString())

To try to debug this segfault, I compiled a recent 5.2 snapshot with
--enable-debug. It produced the above linked core file, which I opened with
gdb to print a backtrace:
http://cgi.sfu.ca/~jdbates/tmp/php/200902270/screenlog

I am not sure what should be my next steps to help fix this segfault?


-- 
Edit bug report at http://bugs.php.net/?id=47522&edit=1
-- 
Try a CVS snapshot (PHP 5.2):        http://bugs.php.net/fix.php?id=47522&r=trysnapshot52
Try a CVS snapshot (PHP 5.3):        http://bugs.php.net/fix.php?id=47522&r=trysnapshot53
Try a CVS snapshot (PHP 6.0):        http://bugs.php.net/fix.php?id=47522&r=trysnapshot60
Fixed in CVS:                        http://bugs.php.net/fix.php?id=47522&r=fixedcvs
Fixed in CVS and need be documented: http://bugs.php.net/fix.php?id=47522&r=needdocs
Fixed in release:                    http://bugs.php.net/fix.php?id=47522&r=alreadyfixed
Need backtrace:                      http://bugs.php.net/fix.php?id=47522&r=needtrace
Need Reproduce Script:               http://bugs.php.net/fix.php?id=47522&r=needscript
Try newer version:                   http://bugs.php.net/fix.php?id=47522&r=oldversion
Not developer issue:                 http://bugs.php.net/fix.php?id=47522&r=support
Expected behavior:                   http://bugs.php.net/fix.php?id=47522&r=notwrong
Not enough info:                     http://bugs.php.net/fix.php?id=47522&r=notenoughinfo
Submitted twice:                     http://bugs.php.net/fix.php?id=47522&r=submittedtwice
register_globals:                    http://bugs.php.net/fix.php?id=47522&r=globals
PHP 4 support discontinued:          http://bugs.php.net/fix.php?id=47522&r=php4
Daylight Savings:                    http://bugs.php.net/fix.php?id=47522&r=dst
IIS Stability:                       http://bugs.php.net/fix.php?id=47522&r=isapi
Install GNU Sed:                     http://bugs.php.net/fix.php?id=47522&r=gnused
Floating point limitations:          http://bugs.php.net/fix.php?id=47522&r=float
No Zend Extensions:                  http://bugs.php.net/fix.php?id=47522&r=nozend
MySQL Configuration Error:           http://bugs.php.net/fix.php?id=47522&r=mysqlcfg

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