ID: 42058
Updated by: [EMAIL PROTECTED]
Reported By: mcorne at yahoo dot com
-Status: Open
+Status: Feedback
Bug Type: Scripting Engine problem
Operating System: *
PHP Version: 5.2CVS-2007-08-13
New Comment:
With a bit simpler test:
<?php
function foo(&$pos)
{
var_dump(debug_backtrace());
$pos++;
}
$pos = 0;
foo($pos);
foo($pos);
?>
I get this:
array(1) {
[0]=>
array(4) {
["file"]=>
string(37) "/home/jani/src/build/php_5_2tst/t.php"
["line"]=>
int(10)
["function"]=>
string(3) "foo"
["args"]=>
array(1) {
[0]=>
&int(0)
}
}
}
array(1) {
[0]=>
array(4) {
["file"]=>
string(37) "/home/jani/src/build/php_5_2tst/t.php"
["line"]=>
int(11)
["function"]=>
string(3) "foo"
["args"]=>
array(1) {
[0]=>
&int(1)
}
}
}
What's wrong in this? (IMO, nothing..)
Previous Comments:
------------------------------------------------------------------------
[2007-08-13 12:18:20] mcorne at yahoo dot com
Just tried with today's snapshot PHP 5.2.4RC1-dev.
Bug is still there!
------------------------------------------------------------------------
[2007-08-04 20:57:48] [EMAIL PROTECTED]
Please try the latest snapshot again, from today.
------------------------------------------------------------------------
[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,
),
),
),
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/?id=42058&edit=1
