From 4866b5683e4ac9d0f16d03d9395f051891657e8e Mon Sep 17 00:00:00 2001
From: Damien Elmes <git@ichi2.net>
Date: Sun, 22 Apr 2012 08:16:36 +0900
Subject: [PATCH] don't show study screen if current deck invalid

---
 aqt/main.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/aqt/main.py b/aqt/main.py
index e5b5bd5ac..4f47c6b4a 100755
--- a/aqt/main.py
+++ b/aqt/main.py
@@ -296,6 +296,10 @@ Are you sure?"""):
         self.moveToState("overview")
 
     def _overviewState(self, oldState):
+        did = self.col.decks.selected()
+        if not self.col.decks.nameOrNone(did):
+            showInfo(_("Please select a deck."))
+            return self.moveToState("deckBrowser")
         self.col.reset()
         self.overview.show()