#42058 [Opn->Fbk]: debug_backtrace() messes up with references
| From: | jani@php.net | Date: | Sat, 04 Aug 2007 20:57:48 +0000 |
| Subject: | #42058 [Opn->Fbk]: debug_backtrace() messes up with references | ||
| References: | 1 | Groups: | php.bugs |
| Request: | Send a blank email to php-bugs+get-115759@lists.php.net to get a copy of this message | ||
ID: 42058
Updated by: jani@php.net
Reported By: mcorne at yahoo dot com
-Status: Open
+Status: Feedback
Bug Type: Scripting Engine problem
Operating System: Windows XP
PHP Version: 5.2CVS-2007-07-23
New Comment:
Please try the latest snapshot again, from today.
Previous Comments:
------------------------------------------------------------------------
[2007-07-23 12:40:46] mcorne at yahoo dot com
I used http://snaps.php.net/win32/php5.2-win32-latest.zip
as you
recommended: PHP Version => 5.2.4-dev. I get the same error.
------------------------------------------------------------------------
[2007-07-21 09:40:59] mcorne at yahoo dot com
Description:
------------
error #1: debug_backtrace() does not report the original value of a
variable passed by reference even if it is called before the variable is
modified.
error #2: debug_backtrace() messes up with the content of an array used
to store debug_backtrace() results from subsequent calls to the same
function.
Reproduce code:
---------------
<?php
function trace()
{
global $trace;
$trace[] = debug_backtrace();
}
function foo(&$pos)
{
trace();
$pos++;
}
$pos = 0;
foo($pos);
echo "error #1\n----------\n";
var_export($trace);
echo "\n\nerror #2\n----------\n";
foo($pos);
var_export($trace);
?>
Expected result:
----------------
error #1
----------
array (
0 =>
array (
0 =>
array (
'file' =>
'D:\\Data\\dev\\i18n-unicodnorm\\trunk\\I18N\\tests\\bug.php',
'line' => 11,
'function' => 'trace',
'args' =>
array (
),
),
1 =>
array (
'file' =>
'D:\\Data\\dev\\i18n-unicodnorm\\trunk\\I18N\\tests\\bug.php',
'line' => 16,
'function' => 'foo',
'args' =>
array (
0 => 0,
),
),
),
)
error #2
----------
array (
0 =>
array (
0 =>
array (
'file' =>
'D:\\Data\\dev\\i18n-unicodnorm\\trunk\\I18N\\tests\\bug.php',
'line' => 11,
'function' => 'trace',
'args' =>
array (
),
),
1 =>
array (
'file' =>
'D:\\Data\\dev\\i18n-unicodnorm\\trunk\\I18N\\tests\\bug.php',
'line' => 16,
'function' => 'foo',
'args' =>
array (
0 => 0,
),
),
),
1 =>
array (
0 =>
array (
'file' =>
'D:\\Data\\dev\\i18n-unicodnorm\\trunk\\I18N\\tests\\bug.php',
'line' => 11,
'function' => 'trace',
'args' =>
array (
),
),
1 =>
array (
'file' =>
'D:\\Data\\dev\\i18n-unicodnorm\\trunk\\I18N\\tests\\bug.php',
'line' => 20,
'function' => 'foo',
'args' =>
array (
0 => 1,
),
),
),
)
Actual result:
--------------
error #1
----------
array (
0 =>
array (
0 =>
array (
'file' =>
'D:\\Data\\dev\\i18n-unicodnorm\\trunk\\I18N\\tests\\bug.php',
'line' => 11,
'function' => 'trace',
'args' =>
array (
),
),
1 =>
array (
'file' =>
'D:\\Data\\dev\\i18n-unicodnorm\\trunk\\I18N\\tests\\bug.php',
'line' => 16,
'function' => 'foo',
'args' =>
array (
0 => 1,
),
),
),
)
error #2
----------
array (
0 =>
array (
0 =>
array (
'file' =>
'D:\\Data\\dev\\i18n-unicodnorm\\trunk\\I18N\\tests\\bug.php',
'line' => 11,
'function' => 'trace',
'args' =>
array (
),
),
1 =>
array (
'file' =>
'D:\\Data\\dev\\i18n-unicodnorm\\trunk\\I18N\\tests\\bug.php',
'line' => 16,
'function' => 'foo',
'args' =>
array (
0 => 2,
),
),
),
1 =>
array (
0 =>
array (
'file' =>
'D:\\Data\\dev\\i18n-unicodnorm\\trunk\\I18N\\tests\\bug.php',
'line' => 11,
'function' => 'trace',
'args' =>
array (
),
),
1 =>
array (
'file' =>
'D:\\Data\\dev\\i18n-unicodnorm\\trunk\\I18N\\tests\\bug.php',
'line' => 20,
'function' => 'foo',
'args' =>
array (
0 => 2,
),
),
),
------------------------------------------------------------------------
--
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