Update Magic.php

Workaround a bug of debug_backtrace() and closures. Closures backtrace differs with regular ones

Author: bertmsk

src/Magic.php

@@ -252,7 +252,17 @@ public static function start(bool $light): void
             self::$isIpcWorker = \defined('MADELINE_WORKER_TYPE') ? MADELINE_WORKER_TYPE === 'madeline-ipc' : false;
             // Important, obtain root relative to caller script
             $backtrace = debug_backtrace(0);
-            self::$script_cwd = self::$cwd = \dirname(end($backtrace)['file']);
+            
+            $last_entry = end($backtrace);
+            $_cwd = '/tmp';
+            if (array_key_exists('file', $last_entry))
+              $_cwd = \dirname($last_entry['file']);
+            else {
+              if (preg_match('/^\{closure\:(.+?)\:/ui', $last_entry['function'], $m))
+                $_cwd = \dirname($m[1]);
+            }
+
+            self::$script_cwd = self::$cwd = $_cwd;
             if (PHP_SAPI !== 'cli' && PHP_SAPI !== 'phpdbg') {
                 try {
                     error_reporting(E_ALL);