#35257 [NEW]: Calling ob_flush after creating an ob callback causes "Segmentation fault"

From: maddog2k at maddog2k dot net Operating system: Linux PHP version: 4.4.1 PHP Bug Type: Output Control Bug description: Calling ob_flush after creating an ob callback causes "Segmentation fault" Description: ------------ This is a copy of bug #35156, which is closed... The code there still segfaults with php4-STABLE-200511160748 (combined with at least Apache 2.0.54/.55). I disabled Zend Optimizer, no change. I've put ob_* functions now into 'disabled_functions' and the logs (Shared Hosting Server) remain free from Segmentation faults. Reproduce code: --------------- (taken from bug #35156) <?php function nooutput($text) { return ""; } print "Before\n"; ob_start("nooutput"); print "Middle\n"; ob_flush(); ob_end_flush(); print "After\n"; ?> Expected result: ---------------- (taken from bug #35156) Before After Actual result: -------------- Apache child Segmentation fault [Thu Nov 17 11:08:59 2005] [notice] child pid 4657 exit signal Segmentation fault (11) -- Edit bug report at http://bugs.php.net/?id=35257&edit=1 -- Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=35257&r=trysnapshot4 Try a CVS snapshot (php5.0): http://bugs.php.net/fix.php?id=35257&r=trysnapshot50 Try a CVS snapshot (php5.1): http://bugs.php.net/fix.php?id=35257&r=trysnapshot51 Fixed in CVS: http://bugs.php.net/fix.php?id=35257&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=35257&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=35257&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=35257&r=needscript Try newer version: http://bugs.php.net/fix.php?id=35257&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=35257&r=support Expected behavior: http://bugs.php.net/fix.php?id=35257&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=35257&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=35257&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=35257&r=globals PHP 3 support discontinued: http://bugs.php.net/fix.php?id=35257&r=php3 Daylight Savings: http://bugs.php.net/fix.php?id=35257&r=dst IIS Stability: http://bugs.php.net/fix.php?id=35257&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=35257&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=35257&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=35257&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=35257&r=mysqlcfg