From: Operating system: Linux PHP version: 5.3.10 Package: Arrays related Bug Type: Bug Bug description:warning in usort when calling debug_backtrace
Description: ------------ When I call a function debug_backtrace() in usort() callback, it triggers unrelated warning. When i var_dump() it's result, it's OK. Verified on my mashine $ php -v PHP 5.3.11-dev (cli) (built: Mar 1 2012 16:31:39) and on my friend's mashine with 5.3.5 Test script: --------------- <?php error_reporting(E_ALL | E_STRICT); $versions = array('1', '2'); usort($versions, function ($me, $him) { debug_backtrace(FALSE); return 1; }); Expected result: ---------------- No warning Actual result: -------------- Warning: usort() [function.usort]: Array was modified by the user comparison function in /home/hosiplan/develop/testing/php/backtrace.error.php on line 18 -- Edit bug report at https://bugs.php.net/bug.php?id=61736&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=61736&r=trysnapshot54 Try a snapshot (PHP 5.3): https://bugs.php.net/fix.php?id=61736&r=trysnapshot53 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=61736&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=61736&r=fixed Fixed in SVN and need be documented: https://bugs.php.net/fix.php?id=61736&r=needdocs Fixed in release: https://bugs.php.net/fix.php?id=61736&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=61736&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=61736&r=needscript Try newer version: https://bugs.php.net/fix.php?id=61736&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=61736&r=support Expected behavior: https://bugs.php.net/fix.php?id=61736&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=61736&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=61736&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=61736&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=61736&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=61736&r=dst IIS Stability: https://bugs.php.net/fix.php?id=61736&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=61736&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=61736&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=61736&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=61736&r=mysqlcfg