From e2711224edd4fd4dcb4ffe303e26fdbbef90a643 Mon Sep 17 00:00:00 2001
From: Christian Kamm <mail@ckamm.de>
Date: Thu, 28 Sep 2017 09:52:21 +0200
Subject: [PATCH] Propagator: Avoid duplicate async abort

---
 src/libsync/owncloudpropagator.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/libsync/owncloudpropagator.h b/src/libsync/owncloudpropagator.h
index 402226bdc9..9655e1ac49 100644
--- a/src/libsync/owncloudpropagator.h
+++ b/src/libsync/owncloudpropagator.h
@@ -445,7 +445,9 @@ public:
 
     void abort()
     {
-        _abortRequested.fetchAndStoreOrdered(true);
+        bool alreadyAborting = _abortRequested.fetchAndStoreOrdered(true);
+        if (alreadyAborting)
+            return;
         if (_rootJob) {
             // Connect to abortFinished  which signals that abort has been asynchronously finished
             connect(_rootJob.data(), &PropagateDirectory::abortFinished, this, &OwncloudPropagator::emitFinished);