SIGSEGV Error: Very Strange

[wysota]

What does the backtrace say?

[grayfox]

What does the backtrace say?

Thread 1 (Thread 0x7ffff7fca7a0 (LWP 12791)):
#0  0x00007ffff5d9b49f in ?? () from /lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#1  0x00007ffff4310382 in XSetCommand () from /usr/lib/x86_64-linux-gnu/libX11.so.6
No symbol table info available.
#2  0x00007ffff4315169 in XSetWMProperties () from /usr/lib/x86_64-linux-gnu/libX11.so.6
No symbol table info available.
#3  0x00007ffff735420a in QWidgetPrivate::create_sys(unsigned long, bool, bool) () from /usr/local/Trolltech/Qt-4.8.0/lib/libQtGui.so.4
No symbol table info available.
#4  0x00007ffff73058e5 in QWidget::create(unsigned long, bool, bool) () from /usr/local/Trolltech/Qt-4.8.0/lib/libQtGui.so.4
No symbol table info available.
#5  0x00007ffff730f3d1 in QWidget::setVisible(bool) () from /usr/local/Trolltech/Qt-4.8.0/lib/libQtGui.so.4
No symbol table info available.
#6  0x0000000000402a5c in QWidget::show (this=0x609ab0) at /usr/local/Trolltech/Qt-4.8.0/include/QtGui/qwidget.h:494
No locals.
#7  0x00000000004029fd in main (argc=1, argv=0x7fffffffe6e8) at Main.cpp:7
        app = {<QApplication> = {<No data fields>}, _mainWindow = 0x609ab0}

Thread 1 (Thread 0x7ffff7fca7a0 (LWP 12791)):
#0  0x00007ffff5d9b49f in ?? () from /lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#1  0x00007ffff4310382 in XSetCommand () from /usr/lib/x86_64-linux-gnu/libX11.so.6
No symbol table info available.
#2  0x00007ffff4315169 in XSetWMProperties () from /usr/lib/x86_64-linux-gnu/libX11.so.6
No symbol table info available.
#3  0x00007ffff735420a in QWidgetPrivate::create_sys(unsigned long, bool, bool) () from /usr/local/Trolltech/Qt-4.8.0/lib/libQtGui.so.4
No symbol table info available.
#4  0x00007ffff73058e5 in QWidget::create(unsigned long, bool, bool) () from /usr/local/Trolltech/Qt-4.8.0/lib/libQtGui.so.4
No symbol table info available.
#5  0x00007ffff730f3d1 in QWidget::setVisible(bool) () from /usr/local/Trolltech/Qt-4.8.0/lib/libQtGui.so.4
No symbol table info available.
#6  0x0000000000402a5c in QWidget::show (this=0x609ab0) at /usr/local/Trolltech/Qt-4.8.0/include/QtGui/qwidget.h:494
No locals.
#7  0x00000000004029fd in main (argc=1, argv=0x7fffffffe6e8) at Main.cpp:7
        app = {<QApplication> = {<No data fields>}, _mainWindow = 0x609ab0}

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[wysota]

Does it work if you use a stable version of Qt?

[grayfox]

Does it work if you use a stable version of Qt?

Same result with Qt 4.7.4

[wysota]

It seems odd the application crashes when setting window properties. What window manager are you using? Does the program work if you rewrite it as:

int main(int argc, char **argv) {
  QApplication app(argc, argv);
  QMainWindow mw;
  mw.setWindowTitle("DEBUG");
  mw.show();
  return app.exec();
}

int main(int argc, char **argv) {
  QApplication app(argc, argv);
  QMainWindow mw;
  mw.setWindowTitle("DEBUG");
  mw.show();
  return app.exec();
}

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