From 7d9ca9dda75a03ae6d8b97660e05017193cc8ba3 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Fri, 24 Sep 2010 10:40:53 -0600
Subject: [PATCH] ...

---
 src/calibre/library/caches.py | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/calibre/library/caches.py b/src/calibre/library/caches.py
index 339f1393f5..1e52350e46 100644
--- a/src/calibre/library/caches.py
+++ b/src/calibre/library/caches.py
@@ -97,8 +97,12 @@ class CoverCache(Thread): # {{{
                 import traceback
                 traceback.print_exc()
                 continue
-            with self.lock:
-                self.cache[id_] = img
+            try:
+                with self.lock:
+                    self.cache[id_] = img
+            except:
+                # Happens during interpreter shutdown
+                break
 
     def set_cache(self, ids):
         with self.lock: