Q_assert

[wysota]

The thing is it killed my app but I could not find that warning message mentioned above... ???

Maybe it's not an assertion that killed your app.

#include <QtGlobal>
 
int main() {
  Q_ASSERT(false);
  return 0;
}

#include <QtGlobal>

int main() {
  Q_ASSERT(false);
  return 0;
}

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ASSERT: "false" in file main.cpp, line 4