Bug #79827 [Com]: debug_backtrace() does not return passed args

Edit report at https://bugs.php.net/bug.php?id=79827&edit=1 ID: 79827 Comment by: michael dot vorisek at email dot cz Reported by: michael dot vorisek at email dot cz Summary: debug_backtrace() does not return passed args Status: Duplicate Type: Bug Package: Scripting Engine problem Operating System: any PHP Version: 7.4.8 Block user comment: N Private report: N New Comment: This actually violates the language definition, as $filename = realpath($filename); is not an assigment by reference! Previous Comments: ------------------------------------------------------------------------ [2020-07-10 16:09:39] michael dot vorisek at email dot cz Any functions that rely on backtrace are currently affected. Is the penalty of copy on write really that high and is there a will to fix this issue? ------------------------------------------------------------------------ [2020-07-10 14:10:35] nikic@php.net Duplicate of bug #71547. ------------------------------------------------------------------------ [2020-07-10 14:08:03] michael dot vorisek at email dot cz Description: ------------ debug_backtrace() currently returns args by reference, ie. the returned args variables, not the passed values. Very hard to debug, backtrace should always return the passed data. Test script: --------------- function x(string $filename) { $filename = realpath($filename); $trace = debug_backtrace(); var_dump($trace[0]['args']); } x('non_existing_file.txt'); Expected result: ---------------- array(1) { [0]=> bool(false) } Actual result: -------------- array(1) { [0]=> string(21) "non_existing_file.txt" } ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=79827&edit=1