clonk Worlds.c4f/Outset.c4s:

(gdb) backtrace
#0  LogFatal (
    szMessage=0x2d5c3680 "Required object file Objects.c4d not available.")
    at src/lib/C4Log.cpp:193
#1  0x08135d5a in C4DefList::Load (this=0x84478a0, 
    szSearch=0x2cdc4d30 "Objects.c4d", dwLoadWhat=974, 
    szLanguage=0x8464842 "US", pSoundSystem=0x8444d50, fOverload=true, 
    iMinProgress=10, iMaxProgress=35) at src/game/object/C4Def.cpp:948
#2  0x080625c3 in C4Game::InitDefs (this=0x84478e0) at src/C4Game.cpp:124
#3  0x08068aa2 in C4Game::InitGame (this=0x84478e0, hGroup=@0x844ea90, 
    fLoadSection=false, fLoadSky=true) at src/C4Game.cpp:2153
#4  0x0806de1e in C4Game::Init (this=0x84478e0) at src/C4Game.cpp:453
#5  0x080dae7d in C4Console::OpenGame (this=0x8447300, 
    szCmdLine=0x29606f8c "\"Worlds.c4f/Outset.c4s\" \"\"")
    at src/editor/C4Console.cpp:1647
#6  0x0805a552 in C4Application::OpenGame (this=0x8442860)
    at src/C4Application.cpp:327
#7  0x0805ab33 in C4Application::GameTick (this=0x8442860)
    at src/C4Application.cpp:403
#8  0x0805ad13 in C4ApplicationGameTimer::Execute (this=0x2bc3a160, iTimeout=0)
    at src/C4Application.cpp:573
#9  0x0832bfd2 in StdScheduler::ScheduleProcs (this=0x8442860, iTimeout=-1)
    at src/platform/StdScheduler.cpp:270
#10 0x0808c2ef in main (argc=2, argv=0xbfbfe8a4) at StdWindow.h:395