pureVirtualCall false positive with Qt signals and slots

How Qt Signals & Slots Work qt connect signal to slot An introductory explanation to Qt Signals and Slots mechanism If you are new to using Qt qtech slot malaysia Qt 5 Design Patterns on Udemy courseqt-5-design-patterns

qt slot signal Hi all, I have a TCanvas in a QT application which I update by a QT timer event When the user closes the TCanvas window, I get a segfault