From ce445f20462463e49bd9dfd417aa7397d4c17f1a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Iv=C3=A1n=20de=20Prado=20Alonso?= <ivan.prado@gmail.com>
Date: Thu, 24 Jun 2021 09:56:05 +0100
Subject: [PATCH] Fix typing

---
 scrapy/core/engine.py | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/scrapy/core/engine.py b/scrapy/core/engine.py
index 949d89e76..81a7a5068 100644
--- a/scrapy/core/engine.py
+++ b/scrapy/core/engine.py
@@ -337,8 +337,9 @@ class ExecutionEngine:
         if DontCloseSpider in detected_ex:
             return None
         if self.spider_is_idle():
-            reason = detected_ex[CloseSpider].reason if CloseSpider in detected_ex else 'finished'
-            self.close_spider(self.spider, reason=reason)
+            ex = detected_ex.get(CloseSpider, CloseSpider(reason='finished'))
+            assert isinstance(ex, CloseSpider)  # typing
+            self.close_spider(self.spider, reason=ex.reason)
 
     def close_spider(self, spider: Spider, reason: str = "cancelled") -> Deferred:
         """Close (cancel) spider and clear all its outstanding requests"""