Infinite loop constently opening a new window using Boost when applying zoom

I could not compile using Boost_Serialize but I've tested a part of the code that seamed suspicious and it actually creates a bug.

#if defined(USE_ITC) && defined(BOOST_SERIALIZE)
    if (Info::Splitter::preview == true && Info::Render::_key_ctrl == true) {
        // we are in preview mode, we have to load the actual data from the serialized files
        Info::Splitter::_x_min = _min_visible_time;
        Info::Splitter::_x_max = _max_visible_time;
        //  Info::Splitter::preview=false;
        _interface_graphic->get_console()->load_data(_interface_graphic->get_trace());
        Info::Render::_key_ctrl = false;
        // return;
    }
#endif

This code is in the apply_zoom_box function. When applying a zoom on a trace, it opens another process with the same trace and applies a zoom to this one. But in this other process, a zoom is now applied, thus opening another process to apply the zoom...

I don't really know what this code was really intended for, and I don't really know if Boost is really used anymore so this needs to be checked.