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Bug #28437 foreach on container object segfaults
Submitted: 2004-05-18 21:01 UTC Modified: 2004-05-18 23:21 UTC
From: fred at argus dot pt Assigned:
Status: Not a bug Package: Reproducible crash
PHP Version: 5.0.0RC2 OS: Linux SuSE 9.0
Private report: No CVE-ID: None
View Developer Edit
 [2004-05-18 21:01 UTC] fred at argus dot pt 
Description:
------------
If I create an object with a container(array) instance variable, and then use foreach to iterate over the container, then a segfault occurs.  If I copy the container to a temporary variable, and foreach over the temp, the code works fine.
Similar code worked fine in PHP4, and I think 5.0.0RC1.

Reproduce code:
---------------
<?php
class user  {
public $msgs = array();
}
class message {
public $text;
}
$user = new user;

$msg = new message;
$msg->text = "Hello";
$user->msgs[] = $msg;

foreach($user->msgs as $msg) {
	echo "<br>Text is $msg->text";
}
echo "<br>Tests completed";
?>

Expected result:
----------------
Text is Hello
Tests completed

Actual result:
--------------
Blank Screen
Segfault message in main server error log.

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 [2004-05-18 21:07 UTC] wez@php.net 
Thank you for this bug report. To properly diagnose the problem, we
need a backtrace to see what is happening behind the scenes. To
find out how to generate a backtrace, please read
http://bugs.php.net/bugs-generating-backtrace.php

Once you have generated a backtrace, please submit it to this bug
report and change the status back to "Open". Thank you for helping
us make PHP better.
 [2004-05-18 23:05 UTC] fred at argus dot pt 
Amazing, I succeeded in getting a backtrace for the first time.
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 16384 (LWP 171)]
0x4076825d in zend_oe () from /usr/local/Zend/lib/Optimizer-2.5.2/php-5.0.0/ZendOptimizer.so
(gdb) bt
#0  0x4076825d in zend_oe () from /usr/local/Zend/lib/Optimizer-2.5.2/php-5.0.0/ZendOptimizer.so
#1  0x4073d68b in zend_oe () from /usr/local/Zend/lib/Optimizer-2.5.2/php-5.0.0/ZendOptimizer.so
#2  0x4073d360 in zend_oe () from /usr/local/Zend/lib/Optimizer-2.5.2/php-5.0.0/ZendOptimizer.so
#3  0x407e8d39 in db_ () from /usr/local/Zend/lib/Debugger-3.5.0/php-5.0.0/ZendDebugger.so
#4  0x40423aa9 in zend_execute_scripts (type=8, retval=0x0, file_count=3) at /usr/local/php-5.0.0RC2/Zend/zend.c:1058
#5  0x403ecf61 in php_execute_script (primary_file=0xbffff290) at /usr/local/php-5.0.0RC2/main/main.c:1630
#6  0x40456766 in php_handler (r=0x82c0cf8) at /usr/local/php-5.0.0RC2/sapi/apache2handler/sapi_apache2.c:556
#7  0x080ab65b in ap_run_handler (r=0x82c0cf8) at config.c:152
#8  0x080abbde in ap_invoke_handler (r=0x82c0cf8) at config.c:358
#9  0x0809a7ab in ap_process_request (r=0x82c0cf8) at http_request.c:246
#10 0x080964cc in ap_process_http_connection (c=0x82bc6a8) at http_core.c:250
#11 0x080b551b in ap_run_process_connection (c=0x82bc6a8) at connection.c:42
#12 0x080aa13d in child_main (child_num_arg=0) at prefork.c:609
#13 0x080aa24d in make_child (s=0x8197fe8, slot=0) at prefork.c:649
#14 0x080aa314 in startup_children (number_to_start=5) at prefork.c:721
#15 0x080aa97d in ap_mpm_run (_pconf=0x8195120, plog=0x81cd200, s=0x0) at prefork.c:940
#16 0x080afd9a in main (argc=2, argv=0xbffff5e4) at main.c:617
 [2004-05-18 23:14 UTC] wez@php.net 
Remove the ZendOptimizer and try again :)
 [2004-05-18 23:15 UTC] wez@php.net 
and the debugger; remove any third party extensions that you didn't compile yourself.
 [2004-05-18 23:17 UTC] fred at argus dot pt 
Wez,
I don't think php is in the frame for this.  After a quick look at the backtrace, I uninstalled Zend Studio Server,
and lo and behold the php code now works.  I'll forward the info to Zend
Best regards. . . Fred
 [2004-05-18 23:20 UTC] fred at argus dot pt 
Sorry forgot to say thanks. . . Fred
 [2004-05-18 23:21 UTC] wez@php.net 
You're welcome ;)
Marking this as bogus, since it wasn't a PHP bug.
 
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