Fix crash on shutdown

Fixes: #9014

2 files changed, 7 insertions, 1 deletions

diff --git a/src/libsync/syncengine.cpp b/src/libsync/syncengine.cpp
index 128573f82..ec6b2f564 100644
--- a/src/libsync/syncengine.cpp
+++ b/src/libsync/syncengine.cpp
@@ -112,6 +112,7 @@ SyncEngine::SyncEngine(AccountPtr account, const QString &localPath,
 
 SyncEngine::~SyncEngine()
 {
+    _goingDown = true;
     abort();
     _excludedFiles.reset();
 }
@@ -981,7 +982,9 @@ void SyncEngine::abort()
         disconnect(_discoveryPhase.data(), nullptr, this, nullptr);
         _discoveryPhase.take()->deleteLater();
 
-        Q_EMIT syncError(tr("Aborted"));
+        if (!_goingDown) {
+            Q_EMIT syncError(tr("Aborted"));
+        }
         finalize(false);
     }
 }
diff --git a/src/libsync/syncengine.h b/src/libsync/syncengine.h
index 4ffa04777..118aa888c 100644
--- a/src/libsync/syncengine.h
+++ b/src/libsync/syncengine.h
@@ -291,6 +291,9 @@ private:
     LocalDiscoveryStyle _lastLocalDiscoveryStyle = LocalDiscoveryStyle::FilesystemOnly;
     LocalDiscoveryStyle _localDiscoveryStyle = LocalDiscoveryStyle::FilesystemOnly;
     std::set<QString> _localDiscoveryPaths;
+
+    // destructor called
+    bool _goingDown = false;
 };
 }