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

From: Date: Fri, 10 Jul 2020 14:08:03 +0000
Subject: Bug #79827 [NEW]: debug_backtrace() does not return passed args
Groups: php.bugs 
Request: Send a blank email to php-bugs+get-227939@lists.php.net to get a copy of this message 
From:             michael dot vorisek at email dot cz
Operating system: any
PHP version:      7.4.8
Package:          Scripting Engine problem
Bug Type:         Bug
Bug description:debug_backtrace() does not return passed args

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 bug report at https://bugs.php.net/bug.php?id=79827&edit=1
-- 
Fix committed:                    https://bugs.php.net/fix.php?id=79827&r=fixed
Fixed in release:                 https://bugs.php.net/fix.php?id=79827&r=alreadyfixed
Need backtrace:                   https://bugs.php.net/fix.php?id=79827&r=needtrace
Need Reproduce Script:            https://bugs.php.net/fix.php?id=79827&r=needscript
Try newer version:                https://bugs.php.net/fix.php?id=79827&r=oldversion
Not developer issue:              https://bugs.php.net/fix.php?id=79827&r=support
Expected behavior:                https://bugs.php.net/fix.php?id=79827&r=notwrong
Not enough info:                  https://bugs.php.net/fix.php?id=79827&r=notenoughinfo
Submitted twice:                  https://bugs.php.net/fix.php?id=79827&r=submittedtwice
register_globals:                 https://bugs.php.net/fix.php?id=79827&r=globals
PHP version support discontinued: https://bugs.php.net/fix.php?id=79827&r=phptooold
Daylight Savings:                 https://bugs.php.net/fix.php?id=79827&r=dst
IIS Stability:                    https://bugs.php.net/fix.php?id=79827&r=isapi
Install GNU Sed:                  https://bugs.php.net/fix.php?id=79827&r=gnused
Floating point limitations:       https://bugs.php.net/fix.php?id=79827&r=float
No Zend Extensions:               https://bugs.php.net/fix.php?id=79827&r=nozend
MySQL Configuration Error:        https://bugs.php.net/fix.php?id=79827&r=mysqlcfg

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