From b80a20c84c1943fcb50c84bae4785f6806095969 Mon Sep 17 00:00:00 2001
From: Andrey Rakhmatullin <wrar@wrar.name>
Date: Mon, 26 Aug 2024 19:16:41 +0500
Subject: [PATCH] Fix a typing error with Twisted 24.7.0.

---
 scrapy/pipelines/media.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scrapy/pipelines/media.py b/scrapy/pipelines/media.py
index 153047acf..a28e47d70 100644
--- a/scrapy/pipelines/media.py
+++ b/scrapy/pipelines/media.py
@@ -208,7 +208,7 @@ class MediaPipeline:
             # minimize cached information for failure
             result.cleanFailure()
             result.frames = []
-            result.stack = None
+            result.stack = []
 
             # This code fixes a memory leak by avoiding to keep references to
             # the Request and Response objects on the Media Pipeline cache.