#30074 [Com]: apparent symbol table error with extract($blah, EXTR_REFS)
ID: 30074
Comment by: shire at facebook dot com
Reported By: owen dot beresford at murphx dot com
Status: No Feedback
Bug Type: Scripting Engine problem
Operating System: linux
PHP Version: 5.0.1
New Comment:
I'm able to reproduce this using current CVS. The problem appears to
be when a CV value is passed into extract() either as the array or an
array value. Looks like in this case the IS_CV value is assigned to
EG(uninitialized_zval_ptr). The following patch will correct the
problem for this case (and still pass a php 'make test'). However I'm
not familiar enough with CV to know if there's a better way to correct
to this problem:
diff --git a/ext/standard/array.c b/ext/standard/array.c
index fad4bf2..fdc9a88 100644
--- a/ext/standard/array.c
+++ b/ext/standard/array.c
@@ -1438,7 +1438,7 @@ PHP_FUNCTION(extract)
*orig_var = *entry;
} else {
- if
((*var_array)-refcount 1) {
+ if
((*var_array)-refcount 1 || *entry == EG(uninitialized_zval_ptr)) {
SEPARATE_ZVAL_TO_MAKE_IS_REF(entry);
} else {
(*entry)-is_ref = 1;
Previous Comments:
[2005-06-15 23:06:27] t3 at rohms dot com
Has this bug been fixed in a release yet? I'd like to see comments
added to these to indicate so and with what versions.
[2005-03-15 01:00:12] 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.
[2005-03-07 21:42:05] [EMAIL PROTECTED]
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
[2005-01-29 21:36:34] t3 at rohms dot com
I believe my problem may be related; I also filed a a
href=http://bugs.php.net/?id=31753;report/a but not every isntance
of extract() was causing problems. I was running 4.3.6 with no
problems; upgraded to 4.3.10 and code didn't work; updated to latest
version of zend; didn't work; downgraded back to 4.3.6, didn't work;
downgraded to 4.3.6 and switched back to previous version of zend:
worked. It seems that the new version of zend may be invovled in the
problem. I wonder if turning down the optimization level would help?
[2005-01-19 22:10:26] [EMAIL PROTECTED]
See also bug #31217
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/30074
--
Edit this bug report at http://bugs.php.net/?id=30074edit=1
#30074 [Com]: apparent symbol table error with extract($blah, EXTR_REFS)
ID: 30074
Comment by: shire at facebook dot com
Reported By: owen dot beresford at murphx dot com
Status: No Feedback
Bug Type: Scripting Engine problem
Operating System: linux
PHP Version: 5.0.1
New Comment:
I forgot to specify that in this case extract is setting the
EG(uninitialized_zval_ptr)-is_ref = 1, causing further problems later
in the code.
Previous Comments:
[2006-12-10 00:54:25] shire at facebook dot com
I'm able to reproduce this using current CVS. The problem appears to
be when a CV value is passed into extract() either as the array or an
array value. Looks like in this case the IS_CV value is assigned to
EG(uninitialized_zval_ptr). The following patch will correct the
problem for this case (and still pass a php 'make test'). However I'm
not familiar enough with CV to know if there's a better way to correct
to this problem:
diff --git a/ext/standard/array.c b/ext/standard/array.c
index fad4bf2..fdc9a88 100644
--- a/ext/standard/array.c
+++ b/ext/standard/array.c
@@ -1438,7 +1438,7 @@ PHP_FUNCTION(extract)
*orig_var = *entry;
} else {
- if
((*var_array)-refcount 1) {
+ if
((*var_array)-refcount 1 || *entry == EG(uninitialized_zval_ptr)) {
SEPARATE_ZVAL_TO_MAKE_IS_REF(entry);
} else {
(*entry)-is_ref = 1;
[2005-06-15 23:06:27] t3 at rohms dot com
Has this bug been fixed in a release yet? I'd like to see comments
added to these to indicate so and with what versions.
[2005-03-15 01:00:12] 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.
[2005-03-07 21:42:05] [EMAIL PROTECTED]
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
[2005-01-29 21:36:34] t3 at rohms dot com
I believe my problem may be related; I also filed a a
href=http://bugs.php.net/?id=31753;report/a but not every isntance
of extract() was causing problems. I was running 4.3.6 with no
problems; upgraded to 4.3.10 and code didn't work; updated to latest
version of zend; didn't work; downgraded back to 4.3.6, didn't work;
downgraded to 4.3.6 and switched back to previous version of zend:
worked. It seems that the new version of zend may be invovled in the
problem. I wonder if turning down the optimization level would help?
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/30074
--
Edit this bug report at http://bugs.php.net/?id=30074edit=1
#30074 [Com]: apparent symbol table error with extract($blah, EXTR_REFS)
ID: 30074 Comment by: t3 at rohms dot com Reported By: owen dot beresford at murphx dot com Status: No Feedback Bug Type: Zend Engine 2 problem Operating System: linux PHP Version: 5.0.1 New Comment: Has this bug been fixed in a release yet? I'd like to see comments added to these to indicate so and with what versions. Previous Comments: [2005-03-15 01:00:12] php-bugs at lists dot php dot net No feedback was provided for this bug for over a week, so it is being suspended automatically. If you are able to provide the information that was originally requested, please do so and change the status of the bug back to Open. [2005-03-07 21:42:05] [EMAIL PROTECTED] Please try using this CVS snapshot: http://snaps.php.net/php5-latest.tar.gz For Windows: http://snaps.php.net/win32/php5-win32-latest.zip [2005-01-29 21:36:34] t3 at rohms dot com I believe my problem may be related; I also filed a a href=http://bugs.php.net/?id=31753;report/a but not every isntance of extract() was causing problems. I was running 4.3.6 with no problems; upgraded to 4.3.10 and code didn't work; updated to latest version of zend; didn't work; downgraded back to 4.3.6, didn't work; downgraded to 4.3.6 and switched back to previous version of zend: worked. It seems that the new version of zend may be invovled in the problem. I wonder if turning down the optimization level would help? [2005-01-19 22:10:26] [EMAIL PROTECTED] See also bug #31217 [2004-12-20 22:29:39] mikael at SPAMMENOTchl dot chalmers dot se My bad, seems it was actually introduced in 4.3.9 by the fix for bug #29493. Then the question is; if it is a feature or a bug, it certainly breaks a lot of old unit tests/code for me. The remainder of the comments for this report are too long. To view the rest of the comments, please view the bug report online at http://bugs.php.net/30074 -- Edit this bug report at http://bugs.php.net/?id=30074edit=1
#30074 [Com]: apparent symbol table error with extract($blah, EXTR_REFS)
ID: 30074
Comment by: t3 at rohms dot com
Reported By: owen dot beresford at murphx dot com
Status: Open
Bug Type: Zend Engine 2 problem
Operating System: linux
PHP Version: 5.0.1
New Comment:
I believe my problem may be related; I also filed a a
href=http://bugs.php.net/?id=31753;report/a but not every isntance
of extract() was causing problems. I was running 4.3.6 with no
problems; upgraded to 4.3.10 and code didn't work; updated to latest
version of zend; didn't work; downgraded back to 4.3.6, didn't work;
downgraded to 4.3.6 and switched back to previous version of zend:
worked. It seems that the new version of zend may be invovled in the
problem. I wonder if turning down the optimization level would help?
Previous Comments:
[2005-01-19 22:10:26] [EMAIL PROTECTED]
See also bug #31217
[2004-12-20 22:29:39] mikael at SPAMMENOTchl dot chalmers dot se
My bad, seems it was actually introduced in 4.3.9 by the fix for bug
#29493. Then the question is; if it is a feature or a bug, it certainly
breaks a lot of old unit tests/code for me.
[2004-12-20 22:09:23] mikael at SPAMMENOTchl dot chalmers dot se
That should read I belive this bug was backported into PHP 4.3.10, it
seems to be present in the newly released 4.3.10 but not in 4.3.9
[2004-12-20 22:07:41] mikael at SPAMMENOTchl dot chalmers dot se
I belive this bug was introduced in PHP 4.3.10, it would seem that when
doing EXTR_REFS $a in the example below isn't
SEPARATE_ZVAL_TO_MAKE_IS_REF or something when being extracted from the
array.
Reproduce code:
$a = 1; $b = 1;
$arr = array('acopy' = $a, 'bref' = $b);
extract($arr, EXTR_REFS);
$acopy++;
$bref++;
debug_zval_dump($a, $b, $arr, $acopy, $bref);
Expected result (As seen on PHP 4.3.10):
$a: long(1) refcount(2)
$b: long(2) refcount(1)
$arr: array(2) refcount(2){
[acopy]=
long(2) refcount(2)
[bref]=
long(2) refcount(3)
}
$acopy: long(2) refcount(1)
$bref: long(2) refcount(1)
Actual result:
--
$a: long(2) refcount(1)
$b: long(2) refcount(1)
$arr: array(2) refcount(2){
[acopy]=
long(2) refcount(3)
[bref]=
long(2) refcount(3)
}
$acopy: long(2) refcount(1)
$bref: long(2) refcount(1)
[2004-11-28 16:34:08] [EMAIL PROTECTED]
Reduced reproduce code looks like this:
?php
$result = extract(array('a'=1, 'b'=$foo), EXTR_REFS);
//extract(array('a'=1, 'b'=$foo), EXTR_REFS); // they are not the
same
var_dump(array($b));
?
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/30074
--
Edit this bug report at http://bugs.php.net/?id=30074edit=1
#30074 [Com]: apparent symbol table error with extract($blah, EXTR_REFS)
ID: 30074
Comment by: mikael at SPAMMENOTchl dot chalmers dot se
Reported By: owen dot beresford at murphx dot com
Status: Open
Bug Type: Scripting Engine problem
Operating System: linux
PHP Version: 5.0.1
New Comment:
I belive this bug was introduced in PHP 4.3.10, it would seem that when
doing EXTR_REFS $a in the example below isn't
SEPARATE_ZVAL_TO_MAKE_IS_REF or something when being extracted from the
array.
Reproduce code:
$a = 1; $b = 1;
$arr = array('acopy' = $a, 'bref' = $b);
extract($arr, EXTR_REFS);
$acopy++;
$bref++;
debug_zval_dump($a, $b, $arr, $acopy, $bref);
Expected result (As seen on PHP 4.3.10):
$a: long(1) refcount(2)
$b: long(2) refcount(1)
$arr: array(2) refcount(2){
[acopy]=
long(2) refcount(2)
[bref]=
long(2) refcount(3)
}
$acopy: long(2) refcount(1)
$bref: long(2) refcount(1)
Actual result:
--
$a: long(2) refcount(1)
$b: long(2) refcount(1)
$arr: array(2) refcount(2){
[acopy]=
long(2) refcount(3)
[bref]=
long(2) refcount(3)
}
$acopy: long(2) refcount(1)
$bref: long(2) refcount(1)
Previous Comments:
[2004-11-28 16:34:08] [EMAIL PROTECTED]
Reduced reproduce code looks like this:
?php
$result = extract(array('a'=1, 'b'=$foo), EXTR_REFS);
//extract(array('a'=1, 'b'=$foo), EXTR_REFS); // they are not the
same
var_dump(array($b));
?
[2004-09-14 11:10:56] owen dot beresford at murphx dot com
I have noticed my code output has the wrong indexes.
the expected out put should read index 0 and index 1 not index 'a',
index 'b'
bug still present
[2004-09-13 15:47:40] owen dot beresford at murphx dot com
Description:
PHP 5.0.1 (cli) (built: Aug 16 2004 23:07:06),
linux, rh7.3, kernel2.4, libc-2.2.5
The extract function seems incomplete/ broken.
I have a code base which uses arguments arrays, like perl.
Inorder to alter varaibles inside the parameter array in a convient
fashion, I extract the variables at the top of the methods.
Some of the boundary cases don't perform correctly. I have NOT
experienced this under other releases of php, so assume the problem is
induced by the new zend engine.
I am assuming that php 5.0.1 includes prevous fixes for errors reported
against php 4.3.8 and php 5.0.0 (there are closed cases with similar
problems).
This is a small simple case, there are other failures, but this would
exceed the twenty line limit. will post an URL with full senario
The described output ommited some of the english statements for
brevity.
I have not tested this under other operating systems, but this is not a
platform dependant function (well it shouldn't be), and I don't have any
to hand.
in the interests of thoroughness:
Configure Command = './configure' '--prefix=/usr'
'--with-config-file-path=/etc' '--enable-cli' '--disable-cgi'
'--without-pear' '--enable-force-cgi-redirect'
'--with-exec-dir=/usr/bin' '--with-mysql' '--with-curl=/usr/local/lib'
'--with-zlib' '--enable-sockets' '--with-openssl' '--enable-pcntl'
'--enable-libxml' '--enable-shared'
Reproduce code:
---
function x($args) {
$count =extract($args, EXTR_REFS);
echo(inside function x()\n$count items\n);
$count+=10;
echo(altered count to $count\n);
var_dump(array($a, $b));
}
echo(before function x() (second is a null)\n);
$a=array('a'=1, 'b'=NULL);
var_dump($a);
x($a);
echo(before function x() (second is undefined variable)\n);
$d=array('a'=1, 'b'=NULL);
$e=array('a'=1, 'b'=$d['d']);
var_dump($e);
x($e);
Expected result:
array(2) {
[a]=
int(1)
[b]=
NULL
}
array(2) {
[a]=
int(1)
[b]=
NULL
}
Actual result:
--
array(2) {
[0]=
int(1)
[1]=
NULL
}
array(2) {
[0]=
int(1)
[1]=
int(12)
}
--
Edit this bug report at http://bugs.php.net/?id=30074edit=1
#30074 [Com]: apparent symbol table error with extract($blah, EXTR_REFS)
ID: 30074
Comment by: mikael at SPAMMENOTchl dot chalmers dot se
Reported By: owen dot beresford at murphx dot com
Status: Open
Bug Type: Scripting Engine problem
Operating System: linux
PHP Version: 5.0.1
New Comment:
My bad, seems it was actually introduced in 4.3.9 by the fix for bug
#29493. Then the question is; if it is a feature or a bug, it certainly
breaks a lot of old unit tests/code for me.
Previous Comments:
[2004-12-20 22:09:23] mikael at SPAMMENOTchl dot chalmers dot se
That should read I belive this bug was backported into PHP 4.3.10, it
seems to be present in the newly released 4.3.10 but not in 4.3.9
[2004-12-20 22:07:41] mikael at SPAMMENOTchl dot chalmers dot se
I belive this bug was introduced in PHP 4.3.10, it would seem that when
doing EXTR_REFS $a in the example below isn't
SEPARATE_ZVAL_TO_MAKE_IS_REF or something when being extracted from the
array.
Reproduce code:
$a = 1; $b = 1;
$arr = array('acopy' = $a, 'bref' = $b);
extract($arr, EXTR_REFS);
$acopy++;
$bref++;
debug_zval_dump($a, $b, $arr, $acopy, $bref);
Expected result (As seen on PHP 4.3.10):
$a: long(1) refcount(2)
$b: long(2) refcount(1)
$arr: array(2) refcount(2){
[acopy]=
long(2) refcount(2)
[bref]=
long(2) refcount(3)
}
$acopy: long(2) refcount(1)
$bref: long(2) refcount(1)
Actual result:
--
$a: long(2) refcount(1)
$b: long(2) refcount(1)
$arr: array(2) refcount(2){
[acopy]=
long(2) refcount(3)
[bref]=
long(2) refcount(3)
}
$acopy: long(2) refcount(1)
$bref: long(2) refcount(1)
[2004-11-28 16:34:08] [EMAIL PROTECTED]
Reduced reproduce code looks like this:
?php
$result = extract(array('a'=1, 'b'=$foo), EXTR_REFS);
//extract(array('a'=1, 'b'=$foo), EXTR_REFS); // they are not the
same
var_dump(array($b));
?
[2004-09-14 11:10:56] owen dot beresford at murphx dot com
I have noticed my code output has the wrong indexes.
the expected out put should read index 0 and index 1 not index 'a',
index 'b'
bug still present
[2004-09-13 15:47:40] owen dot beresford at murphx dot com
Description:
PHP 5.0.1 (cli) (built: Aug 16 2004 23:07:06),
linux, rh7.3, kernel2.4, libc-2.2.5
The extract function seems incomplete/ broken.
I have a code base which uses arguments arrays, like perl.
Inorder to alter varaibles inside the parameter array in a convient
fashion, I extract the variables at the top of the methods.
Some of the boundary cases don't perform correctly. I have NOT
experienced this under other releases of php, so assume the problem is
induced by the new zend engine.
I am assuming that php 5.0.1 includes prevous fixes for errors reported
against php 4.3.8 and php 5.0.0 (there are closed cases with similar
problems).
This is a small simple case, there are other failures, but this would
exceed the twenty line limit. will post an URL with full senario
The described output ommited some of the english statements for
brevity.
I have not tested this under other operating systems, but this is not a
platform dependant function (well it shouldn't be), and I don't have any
to hand.
in the interests of thoroughness:
Configure Command = './configure' '--prefix=/usr'
'--with-config-file-path=/etc' '--enable-cli' '--disable-cgi'
'--without-pear' '--enable-force-cgi-redirect'
'--with-exec-dir=/usr/bin' '--with-mysql' '--with-curl=/usr/local/lib'
'--with-zlib' '--enable-sockets' '--with-openssl' '--enable-pcntl'
'--enable-libxml' '--enable-shared'
Reproduce code:
---
function x($args) {
$count =extract($args, EXTR_REFS);
echo(inside function x()\n$count items\n);
$count+=10;
echo(altered count to $count\n);
var_dump(array($a, $b));
}
echo(before function x() (second is a null)\n);
$a=array('a'=1, 'b'=NULL);
var_dump($a);
x($a);
echo(before function x() (second is undefined variable)\n);
$d=array('a'=1, 'b'=NULL);
$e=array('a'=1, 'b'=$d['d']);
var_dump($e);
x($e);
Expected result:
array(2) {
[a]=
int(1)
[b]=
NULL
}
array(2) {
[a]=
int(1)
[b]=
NULL
}
Actual result:
--
array(2) {
[0]=
int(1)
[1]=
NULL
}
array(2) {
[0]=
int(1)
[1]=
int(12)
}
--
Edit this bug report at http://bugs.php.net/?id=30074edit=1
#30074 [Com]: apparent symbol table error with extract($blah, EXTR_REFS)
ID: 30074
Comment by: mikael at SPAMMENOTchl dot chalmers dot se
Reported By: owen dot beresford at murphx dot com
Status: Open
Bug Type: Scripting Engine problem
Operating System: linux
PHP Version: 5.0.1
New Comment:
That should read I belive this bug was backported into PHP 4.3.10, it
seems to be present in the newly released 4.3.10 but not in 4.3.9
Previous Comments:
[2004-12-20 22:07:41] mikael at SPAMMENOTchl dot chalmers dot se
I belive this bug was introduced in PHP 4.3.10, it would seem that when
doing EXTR_REFS $a in the example below isn't
SEPARATE_ZVAL_TO_MAKE_IS_REF or something when being extracted from the
array.
Reproduce code:
$a = 1; $b = 1;
$arr = array('acopy' = $a, 'bref' = $b);
extract($arr, EXTR_REFS);
$acopy++;
$bref++;
debug_zval_dump($a, $b, $arr, $acopy, $bref);
Expected result (As seen on PHP 4.3.10):
$a: long(1) refcount(2)
$b: long(2) refcount(1)
$arr: array(2) refcount(2){
[acopy]=
long(2) refcount(2)
[bref]=
long(2) refcount(3)
}
$acopy: long(2) refcount(1)
$bref: long(2) refcount(1)
Actual result:
--
$a: long(2) refcount(1)
$b: long(2) refcount(1)
$arr: array(2) refcount(2){
[acopy]=
long(2) refcount(3)
[bref]=
long(2) refcount(3)
}
$acopy: long(2) refcount(1)
$bref: long(2) refcount(1)
[2004-11-28 16:34:08] [EMAIL PROTECTED]
Reduced reproduce code looks like this:
?php
$result = extract(array('a'=1, 'b'=$foo), EXTR_REFS);
//extract(array('a'=1, 'b'=$foo), EXTR_REFS); // they are not the
same
var_dump(array($b));
?
[2004-09-14 11:10:56] owen dot beresford at murphx dot com
I have noticed my code output has the wrong indexes.
the expected out put should read index 0 and index 1 not index 'a',
index 'b'
bug still present
[2004-09-13 15:47:40] owen dot beresford at murphx dot com
Description:
PHP 5.0.1 (cli) (built: Aug 16 2004 23:07:06),
linux, rh7.3, kernel2.4, libc-2.2.5
The extract function seems incomplete/ broken.
I have a code base which uses arguments arrays, like perl.
Inorder to alter varaibles inside the parameter array in a convient
fashion, I extract the variables at the top of the methods.
Some of the boundary cases don't perform correctly. I have NOT
experienced this under other releases of php, so assume the problem is
induced by the new zend engine.
I am assuming that php 5.0.1 includes prevous fixes for errors reported
against php 4.3.8 and php 5.0.0 (there are closed cases with similar
problems).
This is a small simple case, there are other failures, but this would
exceed the twenty line limit. will post an URL with full senario
The described output ommited some of the english statements for
brevity.
I have not tested this under other operating systems, but this is not a
platform dependant function (well it shouldn't be), and I don't have any
to hand.
in the interests of thoroughness:
Configure Command = './configure' '--prefix=/usr'
'--with-config-file-path=/etc' '--enable-cli' '--disable-cgi'
'--without-pear' '--enable-force-cgi-redirect'
'--with-exec-dir=/usr/bin' '--with-mysql' '--with-curl=/usr/local/lib'
'--with-zlib' '--enable-sockets' '--with-openssl' '--enable-pcntl'
'--enable-libxml' '--enable-shared'
Reproduce code:
---
function x($args) {
$count =extract($args, EXTR_REFS);
echo(inside function x()\n$count items\n);
$count+=10;
echo(altered count to $count\n);
var_dump(array($a, $b));
}
echo(before function x() (second is a null)\n);
$a=array('a'=1, 'b'=NULL);
var_dump($a);
x($a);
echo(before function x() (second is undefined variable)\n);
$d=array('a'=1, 'b'=NULL);
$e=array('a'=1, 'b'=$d['d']);
var_dump($e);
x($e);
Expected result:
array(2) {
[a]=
int(1)
[b]=
NULL
}
array(2) {
[a]=
int(1)
[b]=
NULL
}
Actual result:
--
array(2) {
[0]=
int(1)
[1]=
NULL
}
array(2) {
[0]=
int(1)
[1]=
int(12)
}
--
Edit this bug report at http://bugs.php.net/?id=30074edit=1
