[php-src] Issue #8073: Calling debug_backtrace in a foreach cycle restarts the foreach cycle

Issue: https://github.com/php/php-src/issues/8073 Author: andrejsverza ### Description The following code: ```php <?php function demo($array) { $debug_backtrace = []; foreach ($array as $key => &$value) { echo "{$value}\r\n"; if ($value == 3) { unset($array[$key]); continue; } $debug_backtrace[] = debug_backtrace(); } } demo([1, 2, 3]); ``` Resulted in this output: ``` 1 2 3 1 2 ``` But I expected this output instead: ``` 1 2 3 ``` Please pay attention to usage of the ampersand for the $value. Please note that commenting out the "$debug_backtrace[] = debug_backtrace();" will resolve the issue. This happens for PHP 8.0.15 as well. ### PHP Version PHP 8.1.2 ### Operating System Windows 11 & Ubuntu 20.04