#39070 [NEW]: debug_backtrace output when call_user_func or error handler involved

From: alan dot harder at sun dot com Operating system: * PHP version: Irrelevant PHP Bug Type: Documentation problem Bug description: debug_backtrace output when call_user_func or error handler involved Description: ------------ I have found some inconsistencies in the behavior of debug_backtrace. I'm not sure either of these are bugs, so I'm filing this under documentation. 1) If call_user_func is used, debug_backtrace output includes an array entry with no file/line info. Seems to be the case with PHP versions as far back as 4.3.0. debug_backtrace docs do say these are the "possible" values to be in the backtrace, but doesn't list any conditions where file/line might be omitted. If this behavior in the debug_backtrace output is expected, then maybe document this here. 2) If an error handler is invoked, debug_backtrace output differs between PHP versions. PHP 4.x has 2 entries (one with error handler and its params, another with file/line where error occurred).. PHP 5.1.x and 5.2.0RC5 combine these into a single entry (didn't text 5.0.x). Maybe this is related, not sure: http://bugs.php.net/bug.php?id=34175 Perhaps this should be a ChangeLog entry on the docs page for debug_backtrace. Reproduce code: --------------- <pre><?php function my_func() { 1 / 0; } function do_backtrace() { print_r(debug_backtrace()); } set_error_handler('do_backtrace'); call_user_func('my_func'); ?></pre> Expected result: ---------------- Output that can be predicted by reading the debug_backtrace docs. Actual result: -------------- file/line missing for entry after call_user_func, and array length differs between PHP 4.x and 5.1.x/5.2.0. -- Edit bug report at http://bugs.php.net/?id=39070&edit=1 -- Try a CVS snapshot (PHP 4.4): http://bugs.php.net/fix.php?id=39070&r=trysnapshot44 Try a CVS snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=39070&r=trysnapshot52 Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=39070&r=trysnapshot60 Fixed in CVS: http://bugs.php.net/fix.php?id=39070&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=39070&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=39070&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=39070&r=needscript Try newer version: http://bugs.php.net/fix.php?id=39070&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=39070&r=support Expected behavior: http://bugs.php.net/fix.php?id=39070&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=39070&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=39070&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=39070&r=globals PHP 3 support discontinued: http://bugs.php.net/fix.php?id=39070&r=php3 Daylight Savings: http://bugs.php.net/fix.php?id=39070&r=dst IIS Stability: http://bugs.php.net/fix.php?id=39070&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=39070&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=39070&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=39070&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=39070&r=mysqlcfg