Qt example how make multi-thread app with QTimer.

git clone https://github.com/AndreiCherniaev/QThread-with-moveToThread_QTimer.git && cd QThread-with-moveToThread_QTimer
mkdir build/
cmake -S src/ -B build/ --fresh # qt-cmake -S src/ -B build/ -DCMAKE_BUILD_TYPE=Release --fresh
cmake --build build/ --parallel

Tested on Ubuntu 24.04.1 LTS, Qt 6.8.0 with Debug and Release profiles. If push "Stop running program." in Qt Creator there is no problem, so please run proj in terminal. Start proj and push Ctrl+C to exit...

$ build/QThread_QTimer

Worker::Worker
MainWindow::MainWindow
thread->start()
parents QObject(0x0) MainClass(0x7fffc35c40e0)
Worker::run
thread;askTim;0x7b6260960000
thread;GetTime;0x7b625ca006c0;0
^CWelcome to Signal handled:  2
requestInterruption
emit finished()
threadIsFinished
~MainWindow()
~Worker()
QObject::killTimer: Timers cannot be stopped from another thread
QObject::~QObject: Timers cannot be stopped from another thread

1. Looks like problem reason is emit GetTimeAsk() but this signal is connected to slot using Qt::QueuedConnection connection type: "Queued Connection The slot is invoked when control returns to the event loop of the receiver's thread. The slot is executed in the receiver's thread"

connect(this, &MainClass::GetTimeAsk, worker.get(), &Worker::GetTime, Qt::QueuedConnection);

2. And threads is really different: emit GetTimeAsk() located in thread 0x7b6260960000 and slot GetTime() is started from 0x7b625ca006c0 thread... Sounds like problem should not be but in log we have

QObject::killTimer: Timers cannot be stopped from another thread
QObject::~QObject: Timers cannot be stopped from another thread

3. Insted of Qt::QueuedConnection I have tried Qt::AutoConnection, but problem still the same.
4. Another idea was that tim= new QTimer(this) is started in incorrect thread but I don't think so because in log I see first thread->start() and then Worker::run.
5. Anothere idead is to use QScopedPointer: QScopedPointer<QTimer> tim instead of QTimer *tim, but problem is the same.

Instead of QScopedPointer<Worker> worker use raw pointer Worker *worker, see raw_pointer branch.

Qt hierarchy

See article. About SigInt (Ctrl+C) quit see example.