From: lf at burntmail dot com
Operating system: Linux
PHP version: 5.0.0b4 (beta4)
PHP Bug Type: Zend Engine 2 problem
Bug description: list() array key assignment
Description:
------------
When using array keys as variables in the list() function there is a
noticiable memory leak.
It doesn't seem to matter if you assign values to the array key's before
using them in the array.
Reproduce code:
---------------
//memory leak!
while (1)
{
$out = array();
$arr = array('a','b','c');
list($out['a'], $out['b'], $out['c']) = $arr;
}
//NO memory leak!!
while (1)
{
$out = array();
$a = &$out['a'];
$b = &$out['b'];
$c = &$out['c'];
$arr = array('a','b','c');
list($a, $b, $c) = $arr;
}
Expected result:
----------------
Output every 4000 loops
# | Memory usage
4000 | 68 KB
8000 | 68 KB
12000 | 68 KB
16000 | 68 KB
20000 | 68 KB
24000 | 68 KB
28000 | 68 KB
32000 | 68 KB
36000 | 68 KB
40000 | 68 KB
44000 | 68 KB
48000 | 68 KB
52000 | 68 KB
56000 | 68 KB
60000 | 68 KB
64000 | 68 KB
68000 | 68 KB
72000 | 68 KB
76000 | 68 KB
80000 | 68 KB
84000 | 68 KB
88000 | 68 KB
92000 | 68 KB
96000 | 68 KB
100000 | 68 KB
104000 | 68 KB
108000 | 68 KB
112000 | 68 KB
Actual result:
--------------
Output every 4000 loops
# | Memory usage
4000 | 349 KB
8000 | 630 KB
12000 | 911 KB
16000 | 1.2 MB
20000 | 1.4 MB
24000 | 1.7 MB
28000 | 2.0 MB
32000 | 2.3 MB
36000 | 2.5 MB
40000 | 2.8 MB
44000 | 3.1 MB
48000 | 3.4 MB
52000 | 3.6 MB
56000 | 3.9 MB
60000 | 4.2 MB
64000 | 4.5 MB
68000 | 4.7 MB
72000 | 5.0 MB
76000 | 5.3 MB
80000 | 5.6 MB
84000 | 5.8 MB
88000 | 6.1 MB
92000 | 6.4 MB
96000 | 6.7 MB
100000 | 6.9 MB
104000 | 7.2 MB
108000 | 7.5 MB
112000 | 7.8 MB
--
Edit bug report at http://bugs.php.net/?id=27598&edit=1
--
Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=27598&r=trysnapshot4
Try a CVS snapshot (php5): http://bugs.php.net/fix.php?id=27598&r=trysnapshot5
Fixed in CVS: http://bugs.php.net/fix.php?id=27598&r=fixedcvs
Fixed in release: http://bugs.php.net/fix.php?id=27598&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=27598&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=27598&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=27598&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=27598&r=support
Expected behavior: http://bugs.php.net/fix.php?id=27598&r=notwrong
Not enough info: http://bugs.php.net/fix.php?id=27598&r=notenoughinfo
Submitted twice: http://bugs.php.net/fix.php?id=27598&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=27598&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=27598&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=27598&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=27598&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=27598&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=27598&r=float
