From 1c2ca981d8e86c8ba79514ab0849d6ceb6ee1fb4 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Sat, 2 Apr 2022 08:59:20 +0530
Subject: [PATCH] Cleanup overseers explicitly on exit so that their __del__
 method doesnt delay shutdown

---
 src/calibre/gui2/ui.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/calibre/gui2/ui.py b/src/calibre/gui2/ui.py
index d11e8bf700..a0b90fe8cb 100644
--- a/src/calibre/gui2/ui.py
+++ b/src/calibre/gui2/ui.py
@@ -1183,10 +1183,13 @@ class Main(MainWindow, MainWindowMixin, DeviceMixin, EmailMixin,  # {{{
         self.hide_windows()
         if self._spare_pool is not None:
             self._spare_pool.shutdown()
+        from calibre.scraper.simple import cleanup_overseers
+        wait_for_cleanup = cleanup_overseers()
         from calibre.db.delete_service import shutdown
         shutdown()
         time.sleep(2)
         self.istores.join()
+        wait_for_cleanup()
         return True
 
     def run_wizard(self, *args):