Controls branch (8a8aff0388). The attached record reproduces this for me. (I don't have my bugtracker passwort here.)

#0  StdMeshInstance::ExecuteAnimation (this=0xa6183c0, dt=<error reading variable: Could not find type for DW_OP_GNU_const_type>)
    at /home/guenther/source/src/lib/StdMesh.cpp:979
        submesh = <optimized out>
        i = <optimized out>
#1  0x00000000005913ae in StdMeshInstance::ExecuteAnimation (this=<optimized out>, dt=<optimized out>)
    at /home/guenther/source/src/lib/StdMesh.cpp:1007
        iter = {_M_current = 0xf2d78e8}
#2  0x000000000063d035 in C4Object::Execute (this=0xf623280) at /home/guenther/source/src/object/C4Object.cpp:1040
No locals.
#3  0x000000000046c84a in C4Game::ExecObjects (this=this@entry=0xa06d20) at /home/guenther/source/src/game/C4Game.cpp:1331
        cObj = <optimized out>
        clnk = 0xf628be0
#4  0x0000000000471c4b in C4Game::Execute (this=0xa06d20) at /home/guenther/source/src/game/C4Game.cpp:746
        fControl = <optimized out>
#5  0x0000000000469782 in C4Application::GameTick (this=0xa425a0) at /home/guenther/source/src/game/C4Application.cpp:658
No locals.
#6  0x000000000046986a in Execute (this=0xb60d00, iTimeout=<optimized out>) at /home/guenther/source/src/game/C4Application.cpp:854
        Now = <optimized out>
#7  C4ApplicationGameTimer::Execute (this=0xb60d00, iTimeout=<optimized out>) at /home/guenther/source/src/game/C4Application.cpp:837
No locals.
#8  0x00000000006deec5 in StdScheduler::ScheduleProcs (this=0xa425a0, iTimeout=4) at /home/guenther/source/src/platform/StdScheduler.cpp:293
        j = <optimized out>
        begin = <optimized out>
        end = <optimized out>
        any_executed = <optimized out>
        i = <optimized out>
        fds = {<std::_Vector_base<pollfd, std::allocator<pollfd> >> = {
            _M_impl = {<std::allocator<pollfd>> = {<__gnu_cxx::new_allocator<pollfd>> = {<No data fields>}, <No data fields>},
              _M_start = 0x7fffd8018810, _M_finish = 0x7fffd8018838, _M_end_of_storage = 0x7fffd8018840}}, <No data fields>}
        fds_for_proc = {_M_t = {
            _M_impl = {<std::allocator<std::_Rb_tree_node<std::pair<StdSchedulerProc* const, std::pair<unsigned int, unsigned int> > > >> = {<__gnu_cxx::new_allocator<std::_Rb_tree_node<std::pair<StdSchedulerProc* const, std::pair<unsigned int, unsigned int> > > >> = {<No data fields>}, <No data fields>}, _M_key_compare = {<std::binary_function<StdSchedulerProc*, StdSchedulerProc*, bool>> = {<No data fields>}, <No data fields>}, _M_header = {
                _M_color = std::_S_red, _M_parent = 0x7fffd80f2d70, _M_left = 0x7fffd8006010, _M_right = 0x7fffd80fbd50}, _M_node_count = 4}}}
        cnt = <optimized out>
        iProcTick = <optimized out>
        Now = 734309
        fSuccess = <optimized out>
#9  0x00000000006631ad in C4AbstractApp::Run (this=0xa425a0) at /home/guenther/source/src/platform/C4App.cpp:27
No locals.
#10 0x0000000000418a3a in main (argc=1, argv=0x7fffffffe3d8) at /home/guenther/source/src/game/ClonkMain.cpp:210
No locals.