From:
Operating system: ubuntu linux 10.10
PHP version: 5.3.5
Package: Variables related
Bug Type: Bug
Bug description:GC process circle references
Description:
------------
If I first assigned value by value, the result is correct. But if I first
assigned value by references, result is very strange.
<?php
$array2 = array('ooo');
$array2[] =& $array2;
$array2[] = $array2;
xdebug_debug_zval(array2);
?>
Above script will get bellow output:
array2: (refcount=3, is_ref=1)=array (0 => (refcount=2, is_ref=0)='ooo', 1
=>
(refcount=3, is_ref=1)=..., 2 => (refcount=2, is_ref=0)=array (0 =>
(refcount=2,
is_ref=0)='ooo', 1 => (refcount=3, is_ref=1)=..., 2 => (refcount=2,
is_ref=0)=...))
but when run at "$array2[] = $array2", $array2[2] now haven't any value,
but
after assigned, it have a circle reference to $array2[2]...
I think this is a bug...
If this is't a bug, could tell me why?
Test script:
---------------
<?php
$array1 = array('ooo');
$array1[] = $array1;
$array1[] =& $array1;
$array2 = array('ooo');
$array2[] =& $array2;
$array2[] = $array2;
print "<h1>Initial datas</h1>";
print <<< 'nowdoc'
$array1 = array('ooo');<br />
$array1[] = $array1;<br />
$array1[] =& $array1;<br />
$array2 = array('ooo');<br />
$array2[] =& $array2;<br />
$array2[] = $array2;<br />
nowdoc;
print "<h1>xdebug_debug_zval result:</h1>";
xdebug_debug_zval("array1"); print "<br />";
xdebug_debug_zval("array2"); print "<br />";
?>
--
Edit bug report at http://bugs.php.net/bug.php?id=54116&edit=1
--
Try a snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=54116&r=trysnapshot52
Try a snapshot (PHP 5.3):
http://bugs.php.net/fix.php?id=54116&r=trysnapshot53
Try a snapshot (trunk):
http://bugs.php.net/fix.php?id=54116&r=trysnapshottrunk
Fixed in SVN:
http://bugs.php.net/fix.php?id=54116&r=fixed
Fixed in SVN and need be documented:
http://bugs.php.net/fix.php?id=54116&r=needdocs
Fixed in release:
http://bugs.php.net/fix.php?id=54116&r=alreadyfixed
Need backtrace:
http://bugs.php.net/fix.php?id=54116&r=needtrace
Need Reproduce Script:
http://bugs.php.net/fix.php?id=54116&r=needscript
Try newer version:
http://bugs.php.net/fix.php?id=54116&r=oldversion
Not developer issue:
http://bugs.php.net/fix.php?id=54116&r=support
Expected behavior:
http://bugs.php.net/fix.php?id=54116&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=54116&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=54116&r=submittedtwice
register_globals:
http://bugs.php.net/fix.php?id=54116&r=globals
PHP 4 support discontinued: http://bugs.php.net/fix.php?id=54116&r=php4
Daylight Savings: http://bugs.php.net/fix.php?id=54116&r=dst
IIS Stability:
http://bugs.php.net/fix.php?id=54116&r=isapi
Install GNU Sed:
http://bugs.php.net/fix.php?id=54116&r=gnused
Floating point limitations:
http://bugs.php.net/fix.php?id=54116&r=float
No Zend Extensions:
http://bugs.php.net/fix.php?id=54116&r=nozend
MySQL Configuration Error:
http://bugs.php.net/fix.php?id=54116&r=mysqlcfg
