From 78a209edeceeef9b124c51394d48794aabd417a9 Mon Sep 17 00:00:00 2001
From: Damien Elmes <git@ichi2.net>
Date: Wed, 20 Jun 2012 10:28:08 +0900
Subject: [PATCH] catch invalid regex in field search

---
 anki/find.py | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/anki/find.py b/anki/find.py
index e3756d69b..89eb7e9c9 100644
--- a/anki/find.py
+++ b/anki/find.py
@@ -5,6 +5,7 @@
 import re
 from anki.utils import ids2str, splitFields, joinFields, stripHTML, intTime
 from anki.consts import *
+import sre_constants
 
 # Find
 ##########################################################################
@@ -417,8 +418,11 @@ where mid in %s and flds like ? escape '\\'""" % (
             flds = splitFields(flds)
             ord = mods[str(mid)][1]
             strg = flds[ord]
-            if re.search("(?i)^"+regex+"$", strg):
-                nids.append(id)
+            try:
+                if re.search("(?i)^"+regex+"$", strg):
+                    nids.append(id)
+            except sre_constants.error:
+                return
         if not nids:
             return
         return "n.id in %s" % ids2str(nids)