1 files changed, 22 insertions, 14 deletions
diff --git a/vendor/composer/ClassLoader.php b/vendor/composer/ClassLoader.php
index 3a8ed4886..fd56bd7d8 100644
--- a/vendor/composer/ClassLoader.php
+++ b/vendor/composer/ClassLoader.php
@@ -43,7 +43,7 @@ namespace Composer\Autoload;
 class ClassLoader
 {
     /** @var \Closure(string):void */
-    private $includeFile;
+    private static $includeFile;
 
     /** @var ?string */
     private $vendorDir;
@@ -109,18 +109,7 @@ class ClassLoader
     public function __construct($vendorDir = null)
     {
         $this->vendorDir = $vendorDir;
-
-        /**
-         * Scope isolated include.
-         *
-         * Prevents access to $this/self from included files.
-         *
-         * @param  string $file
-         * @return void
-         */
-        $this->includeFile = static function($file) {
-            include $file;
-        };
+        self::initializeIncludeClosure();
     }
 
     /**
@@ -440,7 +429,7 @@ class ClassLoader
     public function loadClass($class)
     {
         if ($file = $this->findFile($class)) {
-            ($this->includeFile)($file);
+            (self::$includeFile)($file);
 
             return true;
         }
@@ -570,4 +559,23 @@ class ClassLoader
 
         return false;
     }
+
+    private static function initializeIncludeClosure(): void
+    {
+        if (self::$includeFile !== null) {
+            return;
+        }
+
+        /**
+         * Scope isolated include.
+         *
+         * Prevents access to $this/self from included files.
+         *
+         * @param  string $file
+         * @return void
+         */
+        self::$includeFile = static function($file) {
+            include $file;
+        };
+    }
 }