ensure compatibility with PHP 8 stack traces

Author: xabbuh

Resource/ClassExistenceResource.php

@@ -190,12 +190,17 @@ public static function throwOnRequiredClass($class, \Exception $previous = null)
             'args' => [$class],
         ];
 
-        if (false === $i = array_search($autoloadFrame, $trace, true)) {
+        if (\PHP_VERSION_ID >= 80000 && isset($trace[1])) {
+            $callerFrame = $trace[1];
+            $i = 2;
+        } elseif (false !== $i = array_search($autoloadFrame, $trace, true)) {
+            $callerFrame = $trace[++$i];
+        } else {
             throw $e;
         }
 
-        if (isset($trace[++$i]['function']) && !isset($trace[$i]['class'])) {
-            switch ($trace[$i]['function']) {
+        if (isset($callerFrame['function']) && !isset($callerFrame['class'])) {
+            switch ($callerFrame['function']) {
                 case 'get_class_methods':
                 case 'get_class_vars':
                 case 'get_parent_class':
@@ -214,8 +219,8 @@ public static function throwOnRequiredClass($class, \Exception $previous = null)
             }
 
             $props = [
-                'file' => isset($trace[$i]['file']) ? $trace[$i]['file'] : null,
-                'line' => isset($trace[$i]['line']) ? $trace[$i]['line'] : null,
+                'file' => isset($callerFrame['file']) ? $callerFrame['file'] : null,
+                'line' => isset($callerFrame['line']) ? $callerFrame['line'] : null,
                 'trace' => \array_slice($trace, 1 + $i),
             ];