Qt 5.12.0 (x86_64-little_endian-lp64 shared (dynamic) debug build; by GCC 7.2.0) QPaintDevice_PTR_CppToPython_QPaintDevice 7QWidget >drawBackground, device= Sbk_QWidgetSpecialCastFunction 0x261bc30 Sbk_QWidgetSpecialCastFunction 0x261bc30 me= 0x261bc30 Sbk_QWidgetSpecialCastFunction 0x261bc30 Sbk_QWidgetSpecialCastFunction 0x261bc30 me= 0x261bc30 Sbk_QWidgetSpecialCastFunction rets= 0x261bc40 0x261bc40 Segmentation fault (core dumped)