#27295 [Opn->Asn]: Memory Leak with sscanf
ID: 27295
Updated by: iliaa@php.net
Reported By: jwalker7281 at yahoo dot com
-Status: Open
+Status: Assigned
Bug Type: Zend Engine 2 problem
Operating System: Redhat Linux 9
-PHP Version: 5.0.0b4 (beta4)
+PHP Version: 4CVS, 5CVS
-Assigned To:
+Assigned To: iliaa
Previous Comments:
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[2004-02-17 15:14:05] jwalker7281 at yahoo dot com
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.
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