From dee38d6f89669125f55c0b72c927256e8da898a9 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Sat, 1 Nov 2014 22:04:28 +0530
Subject: [PATCH] ...

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

diff --git a/src/calibre/db/lazy.py b/src/calibre/db/lazy.py
index d905a70060..2cdae63cd0 100644
--- a/src/calibre/db/lazy.py
+++ b/src/calibre/db/lazy.py
@@ -236,7 +236,7 @@ def composite_getter(mi, field, db, book_id, cache, formatter, template_cache):
         except Exception:
             import traceback
             traceback.print_exc()
-            return ''
+            return 'ERROR WHILE EVALUATING ' + field
         return ret
 
 def virtual_libraries_getter(dbref, book_id, cache):