[SOLVED] Segfault, SVN 11359, Irrlicht SVN 4098

[jackylman]

I encounter a segfault upon starting stk 11359 with irrlicht 4098.
Should I be using a different SVN revision of Irrlicht?
I'm using debian sid with a 3.4 kernel. Thanks.

{l Code}: {l Select All Code}

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Reading symbols from /opt/supertuxkart/cmake/bin/supertuxkart...done.
(gdb) run
Starting program: /opt/supertuxkart/cmake/bin/supertuxkart
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Irrlicht Engine version 1.8.0-alpha
Linux 3.4-4.slh.2-aptosid-amd64 #1 SMP PREEMPT Wed Jun 27 20:58:12 UTC 2012 x86_64
[FileManager] Data files will be fetched from: '/usr/local/share/supertuxkart'
[FileManager] Addons files will be stored in '/home/dave/.local/share/supertuxkart/addons'.
[translate] Env var LANGUAGE = 'en_US.utf8'
[translate] Env var LANGUAGE = 'en_US.utf8', which corresponds to 'English (United States)'
Adding language fallback en
!!!!! Performance warning: Irrlicht compiled with debug mode.!!!!!
!!!!! This can have a significant performance impact         !!!!!
[IrrDriver] Trying OpenGL rendering.
[New Thread 0x7fffeeb89700 (LWP 22076)]
[New Thread 0x7fffe74bd700 (LWP 22077)]
[Thread 0x7fffe74bd700 (LWP 22077) exited]
[New Thread 0x7fffe74bd700 (LWP 22078)]

Program received signal SIGSEGV, Segmentation fault.
0xfffffffffffffeb0 in ?? ()
(gdb) bt
#0  0xfffffffffffffeb0 in ?? ()
#1  0x000000000089b72e in GUIEngine::LabelWidget::add (this=0x2196340) at /opt/supertuxkart/src/guiengine/widgets/label_widget.cpp:84
#2  0x0000000000850c90 in GUIEngine::AbstractTopLevelContainer::addWidgetsRecursively (this=0x17b3310, widgets=..., parent=0x21960d0)
    at /opt/supertuxkart/src/guiengine/abstract_top_level_container.cpp:81
#3  0x0000000000850a3e in GUIEngine::AbstractTopLevelContainer::addWidgetsRecursively (this=0x17b3310, widgets=..., parent=0x0)
    at /opt/supertuxkart/src/guiengine/abstract_top_level_container.cpp:56
#4  0x000000000086dd96 in GUIEngine::Screen::addWidgets (this=0x17b3310) at /opt/supertuxkart/src/guiengine/screen.cpp:167
#5  0x00000000008587f6 in GUIEngine::switchToScreen (screen_name=0x17addd8 "story_mode_lobby.stkgui") at /opt/supertuxkart/src/guiengine/engine.cpp:862
#6  0x000000000084f8cf in GUIEngine::AbstractStateManager::pushMenu (this=0x1659aa0, name=...) at /opt/supertuxkart/src/guiengine/abstract_state_manager.cpp:111
#7  0x000000000084f9b8 in GUIEngine::AbstractStateManager::pushScreen (this=0x1659aa0, screen=0x17b3310)
    at /opt/supertuxkart/src/guiengine/abstract_state_manager.cpp:131
#8  0x000000000092839d in main (argc=1, argv=0x7fffffffe398) at /opt/supertuxkart/src/main.cpp:1289
(gdb) bt full
#0  0xfffffffffffffeb0 in ?? ()
No symbol table info available.
#1  0x000000000089b72e in GUIEngine::LabelWidget::add (this=0x2196340) at /opt/supertuxkart/src/guiengine/widgets/label_widget.cpp:84
        word_wrap = false
        message = {array = 0x17b36c0 L"Select a Player", allocated = 16, used = 16, allocator = {_vptr.irrAllocator = 0xde8e30}}
        align = irr::gui::EGUIA_CENTER
        irrwidget = 0x20294f0
        widget_size = {UpperLeftCorner = {X = 118, Y = 15}, LowerRightCorner = {X = 904, Y = 58}}
        valign = irr::gui::EGUIA_CENTER
#2  0x0000000000850c90 in GUIEngine::AbstractTopLevelContainer::addWidgetsRecursively (this=0x17b3310, widgets=..., parent=0x21960d0)
    at /opt/supertuxkart/src/guiengine/abstract_top_level_container.cpp:81
        n = 0
        widgets_amount = 8
#3  0x0000000000850a3e in GUIEngine::AbstractTopLevelContainer::addWidgetsRecursively (this=0x17b3310, widgets=..., parent=0x0)
    at /opt/supertuxkart/src/guiengine/abstract_top_level_container.cpp:56
        n = 0
        widgets_amount = 1
#4  0x000000000086dd96 in GUIEngine::Screen::addWidgets (this=0x17b3310) at /opt/supertuxkart/src/guiengine/screen.cpp:167
        __PRETTY_FUNCTION__ = "void GUIEngine::Screen::addWidgets()"
        w = 0x17b3310
#5  0x00000000008587f6 in GUIEngine::switchToScreen (screen_name=0x17addd8 "story_mode_lobby.stkgui") at /opt/supertuxkart/src/guiengine/engine.cpp:862
        screen_amount = 1
        __PRETTY_FUNCTION__ = "void GUIEngine::switchToScreen(const char*)"
#6  0x000000000084f8cf in GUIEngine::AbstractStateManager::pushMenu (this=0x1659aa0, name=...) at /opt/supertuxkart/src/guiengine/abstract_state_manager.cpp:111
        __PRETTY_FUNCTION__ = "void GUIEngine::AbstractStateManager::pushMenu(std::string)"
#7  0x000000000084f9b8 in GUIEngine::AbstractStateManager::pushScreen (this=0x1659aa0, screen=0x17b3310)
    at /opt/supertuxkart/src/guiengine/abstract_state_manager.cpp:131
        __PRETTY_FUNCTION__ = "void GUIEngine::AbstractStateManager::pushScreen(GUIEngine::Screen*)"
#8  0x000000000092839d in main (argc=1, argv=0x7fffffffe398) at /opt/supertuxkart/src/main.cpp:1289
        materials_file = {static npos = <optimized out>,
          _M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>> = {<No data fields>}, <No data fields>},
            _M_p = 0x178a408 "/usr/local/share/supertuxkart/data/models//materials.xml"}}


[hiker]

Sorry for the delay in answering, I've been away for a while.

I encounter a segfault upon starting stk 11359 with irrlicht 4098.
Should I be using a different SVN revision of Irrlicht?

I am not entirely sure I've used a previous version and that worked, as well as r4098, and r4225 (this prints some warnings, but this is work in progress).

I'd suggest to first do a clean build, and make sure that the right library is used (we had a few people using header from one version, but linked with a system-wide installed different version of irrlicht).

Otherwise: what exactly do you do? Just start stk? Or do you click on anything?

Cheers,
Joerg

[jackylman]

I just start stk to get the segfault. I made sure libirrlicht-dev package was not installed to avoid the header confusion you refer to.

[Auria]

maybe there is something wrong with the "select a player" screen, and we don't see the problem because we have all already selected a player? I won't have time to debug this myself personnally until at least a week probably but this could give a hint to another developer

[KroArtem]

Using a new player doesn't seem to cause a crash.

[hiker]

I just start stk to get the segfault. I made sure libirrlicht-dev package was not installed to avoid the header confusion you refer to.

The stack trace indicates that you actually started the story mode (but I don't know the GUI code that well, Auria can confirm this).

While I don't think any shaders should be used at this stage, it might be worth trying this:
if you can go to the options menu in stk, set the graphical details to the lowest setting. If you can't even get there (then I admit it might be a futile approach anyway, but still): modify ~/.config/supertuxkart/config.xml, and set all the GFX settings to false or 0.

Cheers,
Joerg

[Auria]

Joerg: actually, despite the screen being called "story_mode_lobby.stkgui", it is now shown at startup, asking to select a player. I should check if I can spot what's wrong when I get internet back at home (soon!)

[Auria]

Unfortunately, looking at the code, I see *no* reason whatsoever why this would happen. The line that crashes is a call to an irrlicht function that has not always existed, so I suspect there is a mismatch in your setup. Maybe you have the irrlicht headers of the latest version, but using a older irrlocht dynamic library?

[jackylman]

Thanks for your time/attention.
I just got a new full-time job (complete with lots of soul-stealing overtime), so unfortunately, I don't have a lot of time for STK now. When more motivated, I may compile a static version and see if the segfault still occurs, to rule out the header/dynamic shared library version mismatch. Maybe a few more cups of coffee...

[jackylman]

As suspected, I had leftover cruft from an earlier install of irrlicht SVN. After removing it, and rebuilding, the program has started. Sorry for the noise. Marking SOLVED.

[Auria]

Glad that it's solved