I am not sure, but it seems, that function denoted in gdb backtrace as #0 0x00007fa238b11303 in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4 is bool QEventDispatcherX11::processEvents(QEventLoop::ProcessEventsFlags flags) from qt-src/src/gui/kernel/qeventdispatcher_x11.cpp
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