From b1267028e32ca58a6660f97b9ef826c5d7c3b78b Mon Sep 17 00:00:00 2001
From: Damien Elmes <gpg@ankiweb.net>
Date: Fri, 6 Dec 2019 14:23:54 +1000
Subject: [PATCH] flagging requires a current card

https://anki.tenderapp.com/discussions/ankidesktop/37324-bug-report
---
 aqt/browser.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/aqt/browser.py b/aqt/browser.py
index 91460909b..86e8400d2 100644
--- a/aqt/browser.py
+++ b/aqt/browser.py
@@ -1593,6 +1593,8 @@ update cards set usn=?, mod=?, did=? where id in """ + scids,
     ######################################################################
 
     def onSetFlag(self, n):
+        if not self.card:
+            return
         # flag needs toggling off?
         if n == self.card.userFlag():
             n = 0