Qt signal slot segmentation fault

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Program received signal SIGSEGV, Segmentation fault.

Join GitHub today. GitHub is home to over 36 million developers working together to host and review code, manage projects, and build software together. c++ - Qt: QToolButton connect other widgets core dump - Stack ... 5 hours ago · I am trying to add a button which can be clicked to hide or show another widget. I use the code shown below to accomplish it. It compiled successfully but I get segmentation fault (core dumped) e... How to Use Signals and Slots - Qt Wiki

I get a segmentation fault when I try to emit a signal on a class that inherts from both QGraphicsLineItem and QObject, when I use the Python 3 feature super() to call the parent class init methods. If I instantiate each parent by directly calling their init method, the code works as intended.

A developer can choose to connect to a signal by creating a function (a slot) and calling the connect() function to relate the signal to the slot. Qt's signals and slots mechanism does not require classes to have knowledge of each other, which makes it much easier to develop highly reusable classes. [C++] Getting a segmentation fault in QT : learnprogramming

It turns out that the reference has to be counted before the PyObject is passed to the slot, not when the object is received. (A local variable, passed to emit() may well be deleted by the time the slot method is called...).. The code added to PythonQtSignalTarget::call() needs to be removed, and instead, line 114 of PythonQtSlot.cpp replaced with:

Ilegální instrukce ti hodí stejný fault jako třeba porušení stránkování a je na operačním systému, jak se s tím vypořádá. Cadus - backend bude BRL-CAD (diskuse)

Signals & Slots | Qt Core 5.12.3

Ako na Qt? Ucim sa Qt a neviem ako mam priradit tlacitku event(SLOT) ako toto mi kompilator nezozerie: QPushButton* btn = new QPushButton("Klikni sem frišky!") this->setCentralWidget(btn); QObject::connect(btn, &QPushButton::clicked, [=] { QMessageBox … OOP návrh aplikace (vyřešeno) Zdravím, dělám aplikaci v Qt, která načítá data a zobrazuje v grafické podobě. Data mohou pocházet z různých zdrojů - xml soubory, modbus po TCP a v budou přibývat další. Jaký konkrétní typ komunikace se použije závisí na nastavení programu …