Crash in font manager

[deveee]

From google play console, STK 1.5-beta1

addr2line shows

font_manager.cpp:863

Full backtace

  *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
pid: 0, tid: 21826 >>> org.supertuxkart.stk_beta <<<

backtrace:
  #00  pc 0x0000000000a481bc  /data/app/~~8Xd6Ugc7ZWeUzhKZCbwIRQ==/org.supertuxkart.stk_beta-4tJwwPrxMOERQ5IF5K6PRw==/split_config.arm64_v8a.apk!libmain.so (FontManager::loadFonts()+863) (BuildId: 4fce2e98f252f98e398ac1d82a4ae863f0481505)
  #01  pc 0x0000000000b11dd4  /data/app/~~8Xd6Ugc7ZWeUzhKZCbwIRQ==/org.supertuxkart.stk_beta-4tJwwPrxMOERQ5IF5K6PRw==/split_config.arm64_v8a.apk!libmain.so (GUIEngine::init(irr::IrrlichtDevice*, irr::video::IVideoDriver*, GUIEngine::AbstractStateManager*, bool)+1145) (BuildId: 4fce2e98f252f98e398ac1d82a4ae863f0481505)
  #02  pc 0x00000000009e88d0  /data/app/~~8Xd6Ugc7ZWeUzhKZCbwIRQ==/org.supertuxkart.stk_beta-4tJwwPrxMOERQ5IF5K6PRw==/split_config.arm64_v8a.apk!libmain.so (initRest()+1888) (BuildId: 4fce2e98f252f98e398ac1d82a4ae863f0481505)
  #03  pc 0x00000000009e9a48  /data/app/~~8Xd6Ugc7ZWeUzhKZCbwIRQ==/org.supertuxkart.stk_beta-4tJwwPrxMOERQ5IF5K6PRw==/split_config.arm64_v8a.apk!libmain.so (android_main(int, char**)+2271) (BuildId: 4fce2e98f252f98e398ac1d82a4ae863f0481505)
  #04  pc 0x0000000000083140  /data/app/~~8Xd6Ugc7ZWeUzhKZCbwIRQ==/org.supertuxkart.stk_beta-4tJwwPrxMOERQ5IF5K6PRw==/split_config.arm64_v8a.apk!libSDL2.so (Java_org_libsdl_app_SDLActivity_nativeRunMain+803) (BuildId: 807fab39398966d8350e1585a880c5e1f3b42b70)
  #05  pc 0x000000000038c088  /data/misc/apexdata/com.android.art/dalvik-cache/arm64/boot.oat (art_jni_trampoline+152)
  #06  pc 0x00000000000131e8  /data/app/~~8Xd6Ugc7ZWeUzhKZCbwIRQ==/org.supertuxkart.stk_beta-4tJwwPrxMOERQ5IF5K6PRw==/oat/arm64/base.odex (org.libsdl.app.SDLMain.run+664)
  #07  pc 0x00000000004f7a68  /data/misc/apexdata/com.android.art/dalvik-cache/arm64/boot.oat (java.lang.Thread.run+72)
  #08  pc 0x000000000036db74  /apex/com.android.art/lib64/libart.so (art_quick_invoke_stub+612)
  #09  pc 0x0000000000359324  /apex/com.android.art/lib64/libart.so (art::ArtMethod::Invoke(art::Thread*, unsigned int*, unsigned int, art::JValue*, char const*)+132)
  #10  pc 0x0000000000944438  /apex/com.android.art/lib64/libart.so (art::detail::ShortyTraits<(char)86>::Type art::ArtMethod::InvokeInstance<(char)86>(art::Thread*, art::ObjPtr<art::mirror::Object>, art::detail::ShortyTraits<>::Type...)+60)
  #11  pc 0x00000000006209f4  /apex/com.android.art/lib64/libart.so (art::Thread::CreateCallback(void*)+1344)
  #12  pc 0x0000000000101c2c  /apex/com.android.runtime/lib64/bionic/libc.so (__pthread_start(void*)+204)
  #13  pc 0x0000000000095a00  /apex/com.android.runtime/lib64/bionic/libc.so (__start_thread+64)

[Alayan-stk-2]

    for (FT_Face face : normal_ttf)
    {
>>>>    if (!FT_HAS_COLOR(face) ||
            (FT_HAS_COLOR(face) && face->num_fixed_sizes == 0))
        {
            checkFTError(FT_Set_Pixel_Sizes(face, 0, m_shaping_dpi),
                "setting DPI");
        }
        m_hb_fonts.push_back(hb_ft_font_create(face, NULL));
    }

The BT crashes on the highlighted line. That's a call to FreeType, and this particular code has not changed in 4 years (since 369c346 )

I would assume it could crash if the "normal_ttf" variable somehow gets things that are not font faces loaded in, but I'm not familiar with that code and how that could happen.