libpng12 and Ubuntu

[Atollski]

Hi Michel,

I have discovered this game recently and have been having a blast! Last month I updated from Ubuntu 16 to 18 and the game no longer launches with the message

FATAL renderer.cpp:97 : image is false. Failed loading libpng12.so.0: libpng12.so.0: cannot open shared object file: no such file or directory.

Tried to get the libpng12 package but apparently it’s no longer supported!

[Michal Brzozowski]

Try downloading this into the game’s directory: http://retired.keeperrl.com/~michal/libpng12.so.0

Let me know if it works and if there are any other problems, and I’ll update the distribution.

[Atollski]

Some progress! It managed to get to the intro video then immediately closed the application.

So tried skipping the animation by hitting escape but it still closed after about 3 seconds of running the game.

Let me know if there’s anything I can do to help!

[Michal Brzozowski]

That’s very strange.

Can you try running the game from command line and see if any error comes up? Also, the game leaves a file ‘stacktrace.out’ when it crashes, please check if it’s there.

[Atollski]

Good call! Just tried that:
atollski@Twisty:~/Applications/Keeper RL Alpha 25$ ./keeper_lin64.sh
*** longjmp causes uninitialized stack frame ***: ./keeper terminated

Stack trace seems more helpful – think I’m missing a font!
Edit – deleted the stack trace just after this and ran again. Think it’s the SIGABRT instead?
FATAL renderer.cpp:619 : fonts.textFont >= 0 is false. Error loading ./data_contrib/Lato-Bol.ttf
Caught SIGSEGV: Segmentation Fault
Current time 1535924032, running time 1
posix_print_stack_trace() at ??:?
posix_signal_handler(int, siginfo*, void*) at ??:?
?? ??:0
std::_Function_handler<void (), DebugOutput::crash()::$_2>::_M_invoke(std::_Any_data const&) at debug.cpp:?
Renderer::loadFonts(DirectoryPath const&, Renderer::FontSet&) at ??:?
Renderer::Renderer(Clock*, std::string const&, Vec2, DirectoryPath const&, FilePath const&, FilePath const&) at ??:?
keeperMain(po::parser&) at main.cpp:?
main at ??:?
?? ??:0
_start at ??:?
Caught SIGABRT: usually caused by an abort() or assert()
Current time 1535924277, running time 11
posix_print_stack_trace() at ??:?
posix_signal_handler(int, siginfo*, void*) at ??:?
?? ??:0
?? ??:0
?? ??:0
?? ??:0
?? ??:0
?? ??:0
?? ??:0
?? ??:0
?? ??:0
?? ??:0
?? ??:0
?? ??:0
?? ??:0
?? ??:0
?? ??:0
?? ??:0
?? ??:0
?? ??:0
?? ??:0
?? ??:0
Renderer::drawAndClearBuffer() at ??:?
WindowView::refreshScreen(bool) at ??:?
WindowView::refreshView() at ??:?
MainLoop::playGame(OwnerPointer<Game>, bool, bool, std::function<std::experimental::optional<MainLoop::ExitCondition> (WeakPointer<Game>)>) at ??:?
MainLoop::splashScreen() at ??:?
MainLoop::start(bool, bool) at ??:?
keeperMain(po::parser&) at main.cpp:?
main at ??:?
?? ??:0
_start at ??:?
Caught SIGABRT: usually caused by an abort() or assert()
Current time 1536053627, running time 10
posix_print_stack_trace() at ??:?
posix_signal_handler(int, siginfo*, void*) at ??:?
?? ??:0
?? ??:0
?? ??:0
?? ??:0
?? ??:0
?? ??:0
?? ??:0
?? ??:0
?? ??:0
?? ??:0
Creature::updateVisibleCreatures() at ??:?
Creature::makeMove() at ??:?
Model::update(double) at ??:?
Game::updateModel(WeakPointer<Model>, double) at ??:?
Game::update(double) at ??:?
MainLoop::playGame(OwnerPointer<Game>, bool, bool, std::function<std::experimental::optional<MainLoop::ExitCondition> (WeakPointer<Game>)>) at ??:?
MainLoop::splashScreen() at ??:?
MainLoop::start(bool, bool) at ??:?
keeperMain(po::parser&) at main.cpp:?
main at ??:?
?? ??:0
_start at ??:?

• This reply was modified 5 years, 7 months ago by Atollski.

[Michal Brzozowski]

Hmm, these are 3 different errors. I assume that you figured out the missing font issue and that’s resolved?

Do you have gdb installed?

[Atollski]

I do now! Just looking at the help on how to use it… 🙂

I’ll have a tinker when I get home from work.

[Atollski]

All working now, many thanks for the help! Looks like it was most likely a system issue, the only thing it really needed was that libpng file.

Not sure where the fix occurred:
– Ubuntu update
– Installed gdb
– Tried running executable directly from lin_64 (couldn’t find files)
– Copied data, data_contrib, data_free into lin_64
– Ran the executable from lin_64 again (working)
– Removed the copied folders
– Ran the .sh (still working)
– Removed gdb (still working)
– removed the libpng12 file again (broken)

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