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I'm facing strange problem. Namely, Qt somehow turns off exception handling in my program. I can't catch any exception, and when I throw an exception application crashes. I'm using Qt 4.7.0 (32 bit) from Qt SDK v2010.05 on Windows 7 (64 bit), g++ (GCC) 4.5.1 from MinGW, NetBeans 6.9.1. But I also cheked this with g++ 3.4.5 (also from MinGW) and Qt Creator 2.0.1 - same strange behavior. For example (simplest case): #include <Qt/QApplication.h> #include <iostream> #include <stdexcept> #include <cstdlib> using namespace std; int main(int argc, char* argv[]) { QApplication app(argc, argv); try { cout << "Before exception" << endl; throw runtime_error("Exception occured"); cout << "After exception" << endl; } catch (runtime_error& exc) { cout << exc.what() << endl; exit(1); } return 0; } When I execute above program I've got this output: Before exception This application has requested the Runtime to terminate it in an unusual way. Please contact the application's support team for more information. I've tried to add flag "-fexceptions" to g++ but it hasn't changed anything. When I don't use Qt, everything is OK: #include <Qt/QApplication.h> // It is not caused only by including Qt header // so it doesn't matter if I comment this out or not #include <iostream> #include <stdexcept> #include <cstdlib> using namespace std; int main(int argc, char* argv[]) { // QApplication app(argc, argv); try { cout << "Before exception" << endl; throw runtime_error("Exception occured"); cout << "After exception" << endl; } catch (runtime_error& exc) { cout << exc.what() << endl;

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