From: jwalker7281 at yahoo dot com
Operating system: Redhat Linux 9
PHP version: 5.0.0b4 (beta4)
PHP Bug Type: Zend Engine 2 problem
Bug description: Memory Leak with sscanf
Description:
------------
I found that using sscanf, at least within a foreach loop, leaks. The
original code I found this in read in a file, and then did foreach( $lines
as $line )... I wrote a small bit of code to simulate that. It doesn't
give the same files for a leak location, but it still leaks.
When running my code, I got this:
/root/php-5.0.0b4/Zend/zend_execute.c(2973) : Freeing 0x40232D30 (2
bytes), script=./objtest
/root/php-5.0.0b4/Zend/zend_variables.c(137) : Actual location (location
was relayed)
=== Total 1 memory leaks detected ===
When running this test simulation code, I got this:
/root/php-5.0.0b4/ext/standard/scanf.c(937) : Freeing 0x4022727C (4
bytes), script=./memleak
=== Total 1 memory leaks detected ===
Both are running PHP5, b4 in CLI mode.
Reproduce code:
---------------
#!/usr/local/bin/php -q
<?php
$strings = array( "#dude = me\n", "#bug = nasty\n" );
foreach( $strings as $string )
{
sscanf( $string, "%s = %[^[]]", $var, $val );
echo "$var = $val\n";
}
?>
Expected result:
----------------
It *works*, as in it outputs:
./memleak
#dude = me
#bug = nasty
But it also gives that memory leak bug.
Actual result:
--------------
Please see above.
--
Edit bug report at http://bugs.php.net/?id=27295&edit=1
--
Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=27295&r=trysnapshot4
Try a CVS snapshot (php5): http://bugs.php.net/fix.php?id=27295&r=trysnapshot5
Fixed in CVS: http://bugs.php.net/fix.php?id=27295&r=fixedcvs
Fixed in release: http://bugs.php.net/fix.php?id=27295&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=27295&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=27295&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=27295&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=27295&r=support
Expected behavior: http://bugs.php.net/fix.php?id=27295&r=notwrong
Not enough info: http://bugs.php.net/fix.php?id=27295&r=notenoughinfo
Submitted twice: http://bugs.php.net/fix.php?id=27295&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=27295&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=27295&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=27295&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=27295&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=27295&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=27295&r=float
