#36418 [NEW]: Graphics errors on multiple processes

From: jraben at alstermedia dot de Operating system: Win XP PHP version: 5.1.2 PHP Bug Type: *Graphics related Bug description: Graphics errors on multiple processes Description: ------------ It's a script that joins a background .gif picture with transparent png 24-bit pictures to a thumb jpg. It actually no the complete script. $bfile is always the same. $file and $target may vary. Some files have corrupted backgrounds, if the script is started in multiple instances at the same time. Seems to be a memory allocation bug. Reproduce code: --------------- $img = @imagecreatefromgif("$bfile"); $imgobj = @imagecreatefrompng("$file"); imagealphablending ( $imgobj, true ); $width = imagesx($imgobj); $height = imagesy($imgobj); $imgnew = imagecreatetruecolor($width, $height); imagecopyresampled($imgnew,$img,0,0,$x,$y,$width,$height,$width,$height); imagecopyresampled($imgnew,$imgobj,0,0,0,0,$width,$height,$width,$height); imagejpeg($imgnew, $target, 90); Expected result: ---------------- Not currupted pictures as .jpg with $bfile gif as background and $file .png as foreground. Actual result: -------------- Some files have corrupted backgrounds, if this script is started in multiple instances at the same time. Seems to be a memory allocation bug or something with loading the same picture multiple times at the same time. -- Edit bug report at http://bugs.php.net/?id=36418&edit=1 -- Try a CVS snapshot (PHP 4.4): http://bugs.php.net/fix.php?id=36418&r=trysnapshot44 Try a CVS snapshot (PHP 5.1): http://bugs.php.net/fix.php?id=36418&r=trysnapshot51 Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=36418&r=trysnapshot60 Fixed in CVS: http://bugs.php.net/fix.php?id=36418&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=36418&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=36418&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=36418&r=needscript Try newer version: http://bugs.php.net/fix.php?id=36418&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=36418&r=support Expected behavior: http://bugs.php.net/fix.php?id=36418&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=36418&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=36418&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=36418&r=globals PHP 3 support discontinued: http://bugs.php.net/fix.php?id=36418&r=php3 Daylight Savings: http://bugs.php.net/fix.php?id=36418&r=dst IIS Stability: http://bugs.php.net/fix.php?id=36418&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=36418&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=36418&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=36418&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=36418&r=mysqlcfg