Bug #50027 [Com]: $this becomes a non-object
Edit report at https://bugs.php.net/bug.php?id=50027edit=1
ID: 50027
Comment by: brian dot feaver at sellingsource dot com
Reported by:phpbugs at colin dot guthr dot ie
Summary:$this becomes a non-object
Status: Closed
Type: Bug
Package:Scripting Engine problem
Operating System: Mandriva Linux (Cooker x86_64)
PHP Version:5.3.1RC2
Assigned To:dmitry
Block user comment: N
Private report: N
New Comment:
Looking through the SVN log and the change log for releases since this was
fixed,
I can't find when this was released, nor the commit to SVN that fixed it.
What commit fixed it and what release was this fixed in?
Previous Comments:
[2011-01-16 22:10:12] s...@php.net
This bug has been fixed in SVN.
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/.
Thank you for the report, and for helping us make PHP better.
[2010-11-16 11:10:35] phpbugs at colin dot guthr dot ie
So far so good! I updated to PHP 5.3.3 again and reproduced the error (and got
four nice core dumps), then applied the patch and tried to reproduce again and
so far, I'm coreless.
Thanks for highlighting the patch. Just with this bug had lead to more
investigations earlier as I've had to jump through hoops to avoid updating to
PHP 5.3.x because of this problem. Still hopefully looking good now :)
[2010-11-16 09:38:23] bsteinbrink at saltation dot de
We encountered this bug yesterday (we could reproduce it quite easily with our
code, but unfortunately we cannot disclose it), debugged it, found out that it
was due to the GC corrupting the std_object_handlers prototype and once we knew
that, we checked with the svn repo and saw that that was fixed in r303016.
The corruption that happens is that the read_property field of
std_object_handlers gets set to NULL, because the GC treated the handler as a
zval.
The report from lukas about the failure to set a property seems like an
independent bug, as a different field got corrupted (and he had the gc turned
off anyway).
[2010-11-10 15:44:51] lukas at twobits dot cz
Bad news. Just got the same bug again, with PHP 5.3.3 and GC switched OFF.
Again, only one Apache process fails. The process begun failing immediately
after Apache restart. A simple reproduce class:
Reproduce code:
---
class Test
{
private $data = NULL;
public function __construct($data)
{
echo pre;
var_dump($this);
echo /pre;
$this-data = $data;
}
public function getData()
{
echo pre;
var_dump($this);
echo /pre;
return $this-data;
}
}
echo PID: . getmypid();
$foo = new Test('Hello');
echo $foo-getData();
Correct output:
---
PID: 22839
object(Test)#1 (1) {
[data:Test:private]=
NULL
}
object(Test)#1 (1) {
[data:Test:private]=
string(5) Hello
}
Hello
Malfunctioning Apache process output:
-
PID: 22818
object(Test)#1 (1) {
[data:Test:private]=
NULL
}
Warning: Attempt to assign property of non-object in /var/www/html/testthis.php
on line 16
object(Test)#1 (1) {
[data:Test:private]=
NULL
}
[2010-05-15 19:06:58] phpbugs at colin dot guthr dot ie
Just for reference, I just tested and this bug is still a problem with 5.3.2.
The remainder of the comments for this report are too long. To view
the rest of the comments, please view the bug report online at
https://bugs.php.net/bug.php?id=50027
--
Edit this bug report at https://bugs.php.net/bug.php?id=50027edit=1
Bug #50027 [Com]: $this becomes a non-object
Edit report at http://bugs.php.net/bug.php?id=50027edit=1
ID: 50027
Comment by: bsteinbrink at saltation dot de
Reported by:phpbugs at colin dot guthr dot ie
Summary:$this becomes a non-object
Status: Open
Type: Bug
Package:Reproducible crash
Operating System: Mandriva Linux (Cooker x86_64)
PHP Version:5.3.1RC2
Block user comment: N
Private report: N
New Comment:
We encountered this bug yesterday (we could reproduce it quite easily
with our code, but unfortunately we cannot disclose it), debugged it,
found out that it was due to the GC corrupting the std_object_handlers
prototype and once we knew that, we checked with the svn repo and saw
that that was fixed in r303016.
The corruption that happens is that the read_property field of
std_object_handlers gets set to NULL, because the GC treated the handler
as a zval.
The report from lukas about the failure to set a property seems like an
independent bug, as a different field got corrupted (and he had the gc
turned off anyway).
Previous Comments:
[2010-11-10 15:44:51] lukas at twobits dot cz
Bad news. Just got the same bug again, with PHP 5.3.3 and GC switched
OFF. Again, only one Apache process fails. The process begun failing
immediately after Apache restart. A simple reproduce class:
Reproduce code:
---
class Test
{
private $data = NULL;
public function __construct($data)
{
echo pre;
var_dump($this);
echo /pre;
$this-data = $data;
}
public function getData()
{
echo pre;
var_dump($this);
echo /pre;
return $this-data;
}
}
echo PID: . getmypid();
$foo = new Test('Hello');
echo $foo-getData();
Correct output:
---
PID: 22839
object(Test)#1 (1) {
[data:Test:private]=
NULL
}
object(Test)#1 (1) {
[data:Test:private]=
string(5) Hello
}
Hello
Malfunctioning Apache process output:
-
PID: 22818
object(Test)#1 (1) {
[data:Test:private]=
NULL
}
Warning: Attempt to assign property of non-object in
/var/www/html/testthis.php on line 16
object(Test)#1 (1) {
[data:Test:private]=
NULL
}
[2010-05-15 19:06:58] phpbugs at colin dot guthr dot ie
Just for reference, I just tested and this bug is still a problem with
5.3.2.
[2010-04-28 10:05:16] ahar...@php.net
The way this bug tracker works is that the bug doesn't get automatically
re-opened from the Feedback status when someone posts a comment; it's
only if the original reporter or a PHP developer actually resets it to
Open.
Reopening, anyway, since feedback was provided.
[2010-04-28 09:47:53] lukas at twobits dot cz
I am unfortunately unable to provide more feedback except that we have
never encountered this problem again with GC off. We have now been using
5.3.2. If we decide to test it with the garbage collector one once
again, I'll provide some more feedback.
[2010-04-27 13:08:07] phpbugs at colin dot guthr dot ie
I'm curious as to why this bug is set to No Feedback... Lukas has
provided more information about the topic to nail it down to a Garbage
Collection issue.
I will try and upgrade sometime soon on my development machine to see if
I can retrigger the problem, but in the meantime, has there been any
progress? Are there now some potentially duplicate bugs and even a fix?
Does the issue still cause you problems Lukas?
Thanks :)
The remainder of the comments for this report are too long. To view
the rest of the comments, please view the bug report online at
http://bugs.php.net/bug.php?id=50027
--
Edit this bug report at http://bugs.php.net/bug.php?id=50027edit=1
Bug #50027 [Com]: $this becomes a non-object
Edit report at http://bugs.php.net/bug.php?id=50027edit=1
ID: 50027
Comment by: phpbugs at colin dot guthr dot ie
Reported by:phpbugs at colin dot guthr dot ie
Summary:$this becomes a non-object
Status: Open
Type: Bug
Package:Reproducible crash
Operating System: Mandriva Linux (Cooker x86_64)
PHP Version:5.3.1RC2
Block user comment: N
Private report: N
New Comment:
So far so good! I updated to PHP 5.3.3 again and reproduced the error
(and got four nice core dumps), then applied the patch and tried to
reproduce again and so far, I'm coreless.
Thanks for highlighting the patch. Just with this bug had lead to more
investigations earlier as I've had to jump through hoops to avoid
updating to PHP 5.3.x because of this problem. Still hopefully looking
good now :)
Previous Comments:
[2010-11-16 09:38:23] bsteinbrink at saltation dot de
We encountered this bug yesterday (we could reproduce it quite easily
with our code, but unfortunately we cannot disclose it), debugged it,
found out that it was due to the GC corrupting the std_object_handlers
prototype and once we knew that, we checked with the svn repo and saw
that that was fixed in r303016.
The corruption that happens is that the read_property field of
std_object_handlers gets set to NULL, because the GC treated the handler
as a zval.
The report from lukas about the failure to set a property seems like an
independent bug, as a different field got corrupted (and he had the gc
turned off anyway).
[2010-11-10 15:44:51] lukas at twobits dot cz
Bad news. Just got the same bug again, with PHP 5.3.3 and GC switched
OFF. Again, only one Apache process fails. The process begun failing
immediately after Apache restart. A simple reproduce class:
Reproduce code:
---
class Test
{
private $data = NULL;
public function __construct($data)
{
echo pre;
var_dump($this);
echo /pre;
$this-data = $data;
}
public function getData()
{
echo pre;
var_dump($this);
echo /pre;
return $this-data;
}
}
echo PID: . getmypid();
$foo = new Test('Hello');
echo $foo-getData();
Correct output:
---
PID: 22839
object(Test)#1 (1) {
[data:Test:private]=
NULL
}
object(Test)#1 (1) {
[data:Test:private]=
string(5) Hello
}
Hello
Malfunctioning Apache process output:
-
PID: 22818
object(Test)#1 (1) {
[data:Test:private]=
NULL
}
Warning: Attempt to assign property of non-object in
/var/www/html/testthis.php on line 16
object(Test)#1 (1) {
[data:Test:private]=
NULL
}
[2010-05-15 19:06:58] phpbugs at colin dot guthr dot ie
Just for reference, I just tested and this bug is still a problem with
5.3.2.
[2010-04-28 10:05:16] ahar...@php.net
The way this bug tracker works is that the bug doesn't get automatically
re-opened from the Feedback status when someone posts a comment; it's
only if the original reporter or a PHP developer actually resets it to
Open.
Reopening, anyway, since feedback was provided.
[2010-04-28 09:47:53] lukas at twobits dot cz
I am unfortunately unable to provide more feedback except that we have
never encountered this problem again with GC off. We have now been using
5.3.2. If we decide to test it with the garbage collector one once
again, I'll provide some more feedback.
The remainder of the comments for this report are too long. To view
the rest of the comments, please view the bug report online at
http://bugs.php.net/bug.php?id=50027
--
Edit this bug report at http://bugs.php.net/bug.php?id=50027edit=1
Bug #50027 [Com]: $this becomes a non-object
Edit report at http://bugs.php.net/bug.php?id=50027edit=1
ID: 50027
Comment by: lukas at twobits dot cz
Reported by:phpbugs at colin dot guthr dot ie
Summary:$this becomes a non-object
Status: Open
Type: Bug
Package:Reproducible crash
Operating System: Mandriva Linux (Cooker x86_64)
PHP Version:5.3.1RC2
Block user comment: N
New Comment:
Bad news. Just got the same bug again, with PHP 5.3.3 and GC switched
OFF. Again, only one Apache process fails. The process begun failing
immediately after Apache restart. A simple reproduce class:
Reproduce code:
---
class Test
{
private $data = NULL;
public function __construct($data)
{
echo pre;
var_dump($this);
echo /pre;
$this-data = $data;
}
public function getData()
{
echo pre;
var_dump($this);
echo /pre;
return $this-data;
}
}
echo PID: . getmypid();
$foo = new Test('Hello');
echo $foo-getData();
Correct output:
---
PID: 22839
object(Test)#1 (1) {
[data:Test:private]=
NULL
}
object(Test)#1 (1) {
[data:Test:private]=
string(5) Hello
}
Hello
Malfunctioning Apache process output:
-
PID: 22818
object(Test)#1 (1) {
[data:Test:private]=
NULL
}
Warning: Attempt to assign property of non-object in
/var/www/html/testthis.php on line 16
object(Test)#1 (1) {
[data:Test:private]=
NULL
}
Previous Comments:
[2010-05-15 19:06:58] phpbugs at colin dot guthr dot ie
Just for reference, I just tested and this bug is still a problem with
5.3.2.
[2010-04-28 10:05:16] ahar...@php.net
The way this bug tracker works is that the bug doesn't get automatically
re-opened from the Feedback status when someone posts a comment; it's
only if the original reporter or a PHP developer actually resets it to
Open.
Reopening, anyway, since feedback was provided.
[2010-04-28 09:47:53] lukas at twobits dot cz
I am unfortunately unable to provide more feedback except that we have
never encountered this problem again with GC off. We have now been using
5.3.2. If we decide to test it with the garbage collector one once
again, I'll provide some more feedback.
[2010-04-27 13:08:07] phpbugs at colin dot guthr dot ie
I'm curious as to why this bug is set to No Feedback... Lukas has
provided more information about the topic to nail it down to a Garbage
Collection issue.
I will try and upgrade sometime soon on my development machine to see if
I can retrigger the problem, but in the meantime, has there been any
progress? Are there now some potentially duplicate bugs and even a fix?
Does the issue still cause you problems Lukas?
Thanks :)
[2010-01-04 12:22:00] lukas at twobits dot cz
We now have about three weeks of successful operation with
zend.enable_gc = Off
I assume it is safe to say that this bug indeed is GC related.
The remainder of the comments for this report are too long. To view
the rest of the comments, please view the bug report online at
http://bugs.php.net/bug.php?id=50027
--
Edit this bug report at http://bugs.php.net/bug.php?id=50027edit=1
Bug #50027 [Com]: $this becomes a non-object
Edit report at http://bugs.php.net/bug.php?id=50027edit=1 ID: 50027 Comment by: lukas at twobits dot cz Reported by: phpbugs at colin dot guthr dot ie Summary: $this becomes a non-object Status: No Feedback Type: Bug Package: Reproducible crash Operating System: Mandriva Linux (Cooker x86_64) PHP Version: 5.3.1RC2 New Comment: I am unfortunately unable to provide more feedback except that we have never encountered this problem again with GC off. We have now been using 5.3.2. If we decide to test it with the garbage collector one once again, I'll provide some more feedback. Previous Comments: [2010-04-27 13:08:07] phpbugs at colin dot guthr dot ie I'm curious as to why this bug is set to No Feedback... Lukas has provided more information about the topic to nail it down to a Garbage Collection issue. I will try and upgrade sometime soon on my development machine to see if I can retrigger the problem, but in the meantime, has there been any progress? Are there now some potentially duplicate bugs and even a fix? Does the issue still cause you problems Lukas? Thanks :) [2010-01-04 12:22:00] lukas at twobits dot cz We now have about three weeks of successful operation with zend.enable_gc = Off I assume it is safe to say that this bug indeed is GC related. [2009-12-16 08:53:15] lukas at twobits dot cz I switched the gc off, will provide feedback in about a week. [2009-12-16 08:11:52] ras...@php.net Does this happen with gc turned off? Try adding: zend.enable_gc = Off to your php.ini file. [2009-12-16 08:09:06] lukas at twobits dot cz We're affected with the same bug - 5.3.1, Fedora Core 8, 32bit, Apache 2.2.6. This happens suddenly after few days of normal operation - then some of the Apache requests end up with $this not defined inside an object instance. Normal operation is resumed after Apache is restarted. We never encountered this problem on 5.3.0 (used for over a month), though I am not saying its not there as lots of our code changed meanwhile as well. The remainder of the comments for this report are too long. To view the rest of the comments, please view the bug report online at http://bugs.php.net/bug.php?id=50027 -- Edit this bug report at http://bugs.php.net/bug.php?id=50027edit=1
Bug #50027 [Com]: $this becomes a non-object
Edit report at http://bugs.php.net/bug.php?id=50027edit=1 ID: 50027 Comment by: phpbugs at colin dot guthr dot ie Reported by: phpbugs at colin dot guthr dot ie Summary: $this becomes a non-object Status: No Feedback Type: Bug Package: Reproducible crash Operating System: Mandriva Linux (Cooker x86_64) PHP Version: 5.3.1RC2 New Comment: I'm curious as to why this bug is set to No Feedback... Lukas has provided more information about the topic to nail it down to a Garbage Collection issue. I will try and upgrade sometime soon on my development machine to see if I can retrigger the problem, but in the meantime, has there been any progress? Are there now some potentially duplicate bugs and even a fix? Does the issue still cause you problems Lukas? Thanks :) Previous Comments: [2010-01-04 12:22:00] lukas at twobits dot cz We now have about three weeks of successful operation with zend.enable_gc = Off I assume it is safe to say that this bug indeed is GC related. [2009-12-16 08:53:15] lukas at twobits dot cz I switched the gc off, will provide feedback in about a week. [2009-12-16 08:11:52] ras...@php.net Does this happen with gc turned off? Try adding: zend.enable_gc = Off to your php.ini file. [2009-12-16 08:09:06] lukas at twobits dot cz We're affected with the same bug - 5.3.1, Fedora Core 8, 32bit, Apache 2.2.6. This happens suddenly after few days of normal operation - then some of the Apache requests end up with $this not defined inside an object instance. Normal operation is resumed after Apache is restarted. We never encountered this problem on 5.3.0 (used for over a month), though I am not saying its not there as lots of our code changed meanwhile as well. [2009-11-12 01:00:02] php-bugs at lists dot php dot net No feedback was provided for this bug for over a week, so it is being suspended automatically. If you are able to provide the information that was originally requested, please do so and change the status of the bug back to Open. The remainder of the comments for this report are too long. To view the rest of the comments, please view the bug report online at http://bugs.php.net/bug.php?id=50027 -- Edit this bug report at http://bugs.php.net/bug.php?id=50027edit=1
