Bug #60927 [->Nab]: Recursive functions for preg_replace_callback causes SEGFAULT

Edit report at https://bugs.php.net/bug.php?id=60927&edit=1 ID: 60927 Updated by: johannes@php.net Reported by: jimmy at axenhus dot com Summary: Recursive functions for preg_replace_callback causes SEGFAULT -Status: Bogus +Status: Not a bug Type: Bug Package: PCRE related Operating System: Ubuntu 11.04 PHP Version: 5.3.9 Block user comment: N Private report: N New Comment: . Previous Comments: ------------------------------------------------------------------------ [2012-01-29 19:47:53] johannes@php.net Thank you for taking the time to write to us, but this is not a bug. Please double-check the documentation available at http://www.php.net/manual/ and the instructions on how to report a bug at http://bugs.php.net/how-to-report.php Recursion ends in a stack overflow. A stack overflow makes the operating system kill the process. ------------------------------------------------------------------------ [2012-01-29 19:33:01] jimmy at axenhus dot com Description: ------------ Using recursive functions for preg_replace_callback that never ends PHP will exit with a SEGFAULT (unexpected signal 11) due to a function stack overflow. It's expected that it should never end and therefore PHP should abort the execution. However PHP should output a helpful error message rather than just aborting it. Depending on your code this could be a major issue to debug. (I was using Drupal and it look me hours to find the source.) Test script: --------------- <?php function a() { b(); } function b() { a(); } preg_replace_callback("/0/s", 'a', "0"); echo "We made it my friend!"; Expected result: ---------------- Some sort of error message that the callback stack limit has been reached. Actual result: -------------- A 500 Internal Server error (Apache with mod_fcgid) and a SEGFAULT in the error log. ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=60927&edit=1