The errors location will be findet.

Heart/AbstractSpace/async.cpp

@@ -3,6 +3,7 @@
 #include <QCoreApplication>
 #include <QDateTime>
 #include <QThread>
+#include <QDebug>
 
 // Private implementation of waitFor functions.
 #define waitPrivate(CONDITION, TIMEOUT) \
@@ -26,6 +27,17 @@ void Async::asyncHandler(Job job,
 
     bool result = job();
 
+    /*This IS ULTRA BUG
+     * For reproduse:
+     * 1. run gdb
+     * 2. skip the 3 step of the asyncLauncher method.
+     * 3. add breackpoint in to this function.
+     * 4. operator = for the resultOfWork operand broken the stack of main thread.
+     * This is true magick.
+     * -\_O_/-
+     * */
+    qDebug() << resultOfWork << " : " << *resultOfWork;
+
     if (resultOfWork)
         *resultOfWork = result;
 

Heart/DataBaseSpace/asyncsqldbwriter.cpp

@@ -19,7 +19,9 @@ using namespace PKG;
 
 AsyncSqlDbWriter::AsyncSqlDbWriter(QObject *ptr):
     SqlDBWriter(ptr) {
-    _own = new QThread(this);
+
+     _own = new QThread();
+     _own->setObjectName("AsyncSqlDbWriter");
     moveToThread(_own);
     _own->start();
 
@@ -28,5 +30,7 @@ AsyncSqlDbWriter::AsyncSqlDbWriter(QObject *ptr):
 AsyncSqlDbWriter::~AsyncSqlDbWriter() {
     _own->quit();
     _own->wait();
+
+    _own->deleteLater();
 }
 }

Heart/DataBaseSpace/asyncsqldbwriter.h

@@ -17,7 +17,7 @@ namespace QH {
  * @brief The AsyncSqlDbWriter class is some as SqlDBWriter bud run all commnad in own thread
  * This class is thread save.
  */
-class AsyncSqlDbWriter : public SqlDBWriter
+class AsyncSqlDbWriter final : public SqlDBWriter
 {
     Q_OBJECT
 public:

Heart/DataBaseSpace/sqldbwriter.cpp

@@ -20,7 +20,6 @@
 #include <QSqlRecord>
 #include <QStandardPaths>
 #include <QCoreApplication>
-#include <QThread>
 
 namespace QH {
 using namespace PKG;