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Yeah, I was using both TGUI and SFML from git.

Great job, thanks for figuring that out!

Does the following work?

Code (cpp) Select Expand

auto font2 = std::make_shared<sf::Font>(font);

Oh yea and if I replace the gui.setFont(font) line with this there is no crash.

Never mind that. It actually crashes BOTH in loadFromFile() and setFont(). I created a bug report at SFML bug tracker and it turns out loadFromFile() crashed because I provided a wrong path to the font file (assets folder is the top directory on Android by default).  After correcting that I was able to use sf::Text without an issue. However, when I switched back to TGUI, it crashed again and this time I am 100% it is in setFont() - use the minimal example above with if(!font.loadFromFile("sansation.ttf")). The backtrace is different this time:

:     #00 pc 000318d6  /data/app/xyz.simek.theycome-1/lib/arm/libsfml-graphics.so (FT_Stroker_Done+9)
:     #01 pc 0001590d  /data/app/xyz.simek.theycome-1/lib/arm/libsfml-graphics.so (sf::Font::cleanup()+72)
:     #02 pc 00015931  /data/app/xyz.simek.theycome-1/lib/arm/libsfml-graphics.so (sf::Font::~Font()+4)
:     #03 pc 0006422b  /data/app/xyz.simek.theycome-1/lib/arm/libc++_shared.so (std::__1::__shared_weak_count::__release_shared()+46)
:     #04 pc 0005dd1d  /data/app/xyz.simek.theycome-1/lib/arm/libtgui.so (tgui::Widget::setFont(tgui::Font const&)+36)
:     #05 pc 000423df  /data/app/xyz.simek.theycome-1/lib/arm/libtgui.so (tgui::Container::setFont(tgui::Font const&)+6)
:     #06 pc 000067cf  /data/app/xyz.simek.theycome-1/lib/arm/libsfml-example.so (main+322)
:     #07 pc 00006903  /data/app/xyz.simek.theycome-1/lib/arm/libsfml-example.so (sf::priv::main(sf::priv::ActivityStates*)+70)
:     #08 pc 00007e6f  /data/app/xyz.simek.theycome-1/lib/arm/libsfml-system.so
:     #09 pc 0003e7f7  /system/lib/libc.so (__pthread_start(void*)+30)
:     #10 pc 00018d9d  /system/lib/libc.so (__start_thread+6)

You are right the crash was earlier than setFont(), it's in font.loadFromFile(), so it is not TGUI fault after all. Just for reference this is all I had:

Code (cpp) Select Expand

#include <SFML/System.hpp>
#include <SFML/Window.hpp>
#include <SFML/Graphics.hpp>
#include <SFML/Audio.hpp>
#include <SFML/Network.hpp>
#include <TGUI/TGUI.hpp>

int main()
{
    sf::RenderWindow window{{800, 600}, "Window"};
    tgui::Gui gui{window}; // Create the gui and attach it to the window
   
    sf::Font font;

    if(!font.loadFromFile("assets/sansation.ttf"))
    {
        std::cerr << "Could not load font" << std::endl;
        return 1;
    }

    gui.setFont(font);

    while (window.isOpen())
    {
        sf::Event event;
        while (window.pollEvent(event))
        {
            if (event.type == sf::Event::Closed)
                window.close();

            gui.handleEvent(event); // Pass the event to the widgets
        }

        window.clear();
        gui.draw(); // Draw all widgets
        window.display();
    }
}

If you mean like this:

Code (cpp) Select Expand

    auto font2 = std::make_shared<sf::Font>(font);
    gui.setFont(font2);

Then it crashes as well:

02-06 21:09:13.381    66    66 F DEBUG   : *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
02-06 21:09:13.381    66    66 F DEBUG   : Build fingerprint: 'generic/sdk_phone_armv7/generic:6.0/MRA44C/2166767:eng/test-keys'
02-06 21:09:13.382    66    66 F DEBUG   : Revision: '0'
02-06 21:09:13.382    66    66 F DEBUG   : ABI: 'arm'
02-06 21:09:13.383    66    66 F DEBUG   : pid: 1326, tid: 1340, name: .simek.theycome  >>> xyz.simek.theycome <<<
02-06 21:09:13.383    66    66 F DEBUG   : signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x0
02-06 21:09:13.881    66    66 F DEBUG   :     r0 00000000  r1 00000000  r2 00000000  r3 00000000
02-06 21:09:13.882    66    66 F DEBUG   :     r4 a4c3f578  r5 00000000  r6 a4c3f888  r7 ae91d740
02-06 21:09:13.882    66    66 F DEBUG   :     r8 a5442de4  r9 a4c3f570  sl a4c3f888  fp ad097de4
02-06 21:09:13.883    66    66 F DEBUG   :     ip ad111ff0  sp a4c3f4e8  lr ad10e721  pc ac768d8c  cpsr 60000030
02-06 21:09:13.960    66    66 F DEBUG   :
02-06 21:09:13.960    66    66 F DEBUG   : backtrace:
02-06 21:09:13.961    66    66 F DEBUG   :     #00 pc 00008d8c  /system/lib/libandroid.so (AAsset_seek+1)
02-06 21:09:13.961    66    66 F DEBUG   :     #01 pc 0000871d  /data/app/xyz.simek.theycome-2/lib/arm/libsfml-system.so (sf::priv::ResourceStream::seek(long long)+8)
02-06 21:09:13.962    66    66 F DEBUG   :     #02 pc 00015d63  /data/app/xyz.simek.theycome-2/lib/arm/libsfml-graphics.so (sf::Font::loadFromStream(sf::InputStream&)+62)
02-06 21:09:13.962    66    66 F DEBUG   :     #03 pc 000065e3  /data/app/xyz.simek.theycome-2/lib/arm/libsfml-example.so (main+186)
02-06 21:09:13.963    66    66 F DEBUG   :     #04 pc 0000680b  /data/app/xyz.simek.theycome-2/lib/arm/libsfml-example.so (sf::priv::main(sf::priv::ActivityStates*)+70)
02-06 21:09:13.963    66    66 F DEBUG   :     #05 pc 00007e6f  /data/app/xyz.simek.theycome-2/lib/arm/libsfml-system.so
02-06 21:09:13.964    66    66 F DEBUG   :     #06 pc 0003e7f7  /system/lib/libc.so (__pthread_start(void*)+30)
02-06 21:09:13.964    66    66 F DEBUG   :     #07 pc 00018d9d  /system/lib/libc.so (__start_thread+6)

I think I found a bug with TGUI on Android. Let's use the minimal example from the documentation and just add this:

Code (cpp) Select Expand

    sf::Font font;

    if(!font.loadFromFile("assets/sansation.ttf"))
    {
        std::cerr << "Could not load font" << std::endl;
        return 1;
    }

    gui.setFont(font);

It works fine on OS X, but on Android it will crash with this log: https://pastebin.com/WBe1BGnT

If you don't use custom font then it works without any issues.