From cbc989d00e1c2c9fa29757cb0368aec534f68fec Mon Sep 17 00:00:00 2001
From: Laurent Monin <github@norz.org>
Date: Thu, 8 Feb 2018 01:04:40 +0100
Subject: [PATCH] Prevent multiple calls to tagger.exit()

When Picard is stopped by signal (ie. CTRL-C from linux command line), exit() may be called more than once.
---
 picard/tagger.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/picard/tagger.py b/picard/tagger.py
index e74c7c473..8e8443ae9 100644
--- a/picard/tagger.py
+++ b/picard/tagger.py
@@ -278,8 +278,10 @@ class Tagger(QtWidgets.QApplication):
             self.nats.update()
 
     def exit(self):
-        log.debug("Picard stopping")
+        if self.stopping:
+            return
         self.stopping = True
+        log.debug("Picard stopping")
         self._acoustid.done()
         self.thread_pool.waitForDone()
         self.save_thread_pool.waitForDone()