Add a synchrony Worker destructor that avoids that workers are killed active during application exit.

This happens because the deleteLater() signal might not reach the thread early enough before the event cue is destroyed.

Author: daschuer

src/analyzer/trackanalysisscheduler.cpp

@@ -92,6 +92,7 @@ TrackAnalysisScheduler::TrackAnalysisScheduler(
 
 TrackAnalysisScheduler::~TrackAnalysisScheduler() {
     kLogger.debug() << "Destroying";
+    // here the Worker in m_workers after the associated thread is finished
 }
 
 void TrackAnalysisScheduler::emitProgressOrFinished() {

src/analyzer/trackanalysisscheduler.h

@@ -87,6 +87,14 @@ class TrackAnalysisScheduler : public QObject {
         Worker(const Worker&) = delete;
         Worker(Worker&&) = default;
 
+        ~Worker() {
+            if (m_pThread) {
+                m_pThread->stop();
+                m_pThread->wait();
+                delete m_pThread.release();
+            }
+        }
+
         bool hasThread() const {
             return static_cast<bool>(m_pThread);
         }