From b9b688efc5beec0c98d7719e74096361363aec9f Mon Sep 17 00:00:00 2001
From: Charles Haley <cbhaley@i.wont.say.com>
Date: Sat, 11 Mar 2017 18:38:56 +0100
Subject: [PATCH] During shutdown, the gui attempts to update itself if a
 library closed plugin updates columns. This happens because the gui thinks
 the database is still open when the windows are being hidden.

---
 src/calibre/gui2/ui.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/calibre/gui2/ui.py b/src/calibre/gui2/ui.py
index 06dea6bbb8..f3d4d03d87 100644
--- a/src/calibre/gui2/ui.py
+++ b/src/calibre/gui2/ui.py
@@ -956,7 +956,7 @@ class Main(MainWindow, MainWindowMixin, DeviceMixin, EmailMixin,  # {{{
             mb.stop()
 
         if db is not None:
-            db.close()
+            self.library_view.model().close()
 
         try:
             try: