lib/irrlichtmt/source/Irrlicht/CGUIFileOpenDialog.cpp:436:17: runtime error: member call on null pointer of type 'struct IGUIElement'
    #0 0x560e2712d8a1 in irr::gui::CGUIFileOpenDialog::sendSelectedEvent(irr::gui::EGUI_EVENT_TYPE) (bin/minetest+0x42268a1)
    #1 0x560e271280f1 in irr::gui::CGUIFileOpenDialog::OnEvent(irr::SEvent const&) (bin/minetest+0x42210f1)
    #2 0x560e2759cd4f in irr::gui::CGUIButton::OnEvent(irr::SEvent const&) (bin/minetest+0x4695d4f)
    #3 0x560e270fef14 in irr::gui::CGUIEnvironment::postEventFromUser(irr::SEvent const&) (bin/minetest+0x41f7f14)
    #4 0x560e270e4c9e in irr::CIrrDeviceStub::postEventFromUser(irr::SEvent const&) (bin/minetest+0x41ddc9e)
    #5 0x560e270ab1c6 in irr::CIrrDeviceLinux::run() (bin/minetest+0x41a41c6)
    #6 0x560e26183eb5 in RenderingEngine::run() (bin/minetest+0x327ceb5)
    #7 0x560e26617eb1 in GUIEngine::run() (bin/minetest+0x3710eb1)
    #8 0x560e26616828 in GUIEngine::GUIEngine(JoystickController*, irr::gui::IGUIElement*, RenderingEngine*, IMenuManager*, MainMenuData*, bool&) (bin/minetest+0x370f828)
    #9 0x560e2617feb9 in ClientLauncher::main_menu(MainMenuData*) (bin/minetest+0x3278eb9)
    #10 0x560e2617d88e in ClientLauncher::launch_game(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >&, bool, GameStartData&, Settings const&) (bin/minetest+0x327688e)
    #11 0x560e2617a802 in ClientLauncher::run(GameStartData&, Settings const&) (bin/minetest+0x3273802)
    #12 0x560e26e2be71 in main (bin/minetest+0x3f24e71)
    #13 0x7f55dbb6909a in __libc_start_main ../csu/libc-start.c:308
    #14 0x560e260a4419 in _start (bin/minetest+0x319d419)

lib/irrlichtmt/source/Irrlicht/CGUIFileOpenDialog.cpp:436:23: runtime error: member access within null pointer of type 'struct IGUIElement'
    #0 0x560e2712d957 in irr::gui::CGUIFileOpenDialog::sendSelectedEvent(irr::gui::EGUI_EVENT_TYPE) (bin/minetest+0x4226957)
    #1 0x560e271280f1 in irr::gui::CGUIFileOpenDialog::OnEvent(irr::SEvent const&) (bin/minetest+0x42210f1)
    #2 0x560e2759cd4f in irr::gui::CGUIButton::OnEvent(irr::SEvent const&) (bin/minetest+0x4695d4f)
    #3 0x560e270fef14 in irr::gui::CGUIEnvironment::postEventFromUser(irr::SEvent const&) (bin/minetest+0x41f7f14)
    #4 0x560e270e4c9e in irr::CIrrDeviceStub::postEventFromUser(irr::SEvent const&) (bin/minetest+0x41ddc9e)
    #5 0x560e270ab1c6 in irr::CIrrDeviceLinux::run() (bin/minetest+0x41a41c6)
    #6 0x560e26183eb5 in RenderingEngine::run() (bin/minetest+0x327ceb5)
    #7 0x560e26617eb1 in GUIEngine::run() (bin/minetest+0x3710eb1)
    #8 0x560e26616828 in GUIEngine::GUIEngine(JoystickController*, irr::gui::IGUIElement*, RenderingEngine*, IMenuManager*, MainMenuData*, bool&) (bin/minetest+0x370f828)
    #9 0x560e2617feb9 in ClientLauncher::main_menu(MainMenuData*) (bin/minetest+0x3278eb9)
    #10 0x560e2617d88e in ClientLauncher::launch_game(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >&, bool, GameStartData&, Settings const&) (bin/minetest+0x327688e)
    #11 0x560e2617a802 in ClientLauncher::run(GameStartData&, Settings const&) (bin/minetest+0x3273802)
    #12 0x560e26e2be71 in main (bin/minetest+0x3f24e71)
    #13 0x7f55dbb6909a in __libc_start_main ../csu/libc-start.c:308
    #14 0x560e260a4419 in _start (bin/minetest+0x319d419)