#0  std::__unguarded_partition<light*, __gnu_cxx::__ops::_Iter_comp_iter<bool (*)(light const&, light const&)> > (__first=0x7ffda7c8f9f8,
    __last=0x7fec77201798, __pivot=0x7ffda7c8f5c0, __comp=...)
    at /usr/include/c++/4.9.2/bits/stl_algo.h:1904
#1  0x0000000000508680 in std::__unguarded_partition_pivot<light*, __gnu_cxx::__ops::_Iter_comp_iter<bool (*)(light const&, light const&)> > (
    __first=0x7ffda7c8f5c0, __last=0x7ffda7c8fdb8, __comp=...)
    at /usr/include/c++/4.9.2/bits/stl_algo.h:1922
#2  0x00000000005080a8 in std::__introsort_loop<light*, long, __gnu_cxx::__ops::_Iter_comp_iter<bool (*)(light const&, light const&)> > (
    __first=0x7ffda7c8f5c0, __last=0x7ffda7c8fdb8, __depth_limit=7, __comp=...)
    at /usr/include/c++/4.9.2/bits/stl_algo.h:1952
#3  0x0000000000507787 in std::__sort<light*, __gnu_cxx::__ops::_Iter_comp_iter<bool (*)(light const&, light const&)> > (__first=0x7ffda7c8f5c0,
    __last=0x7ffda7c8fdb8, __comp=...)
    at /usr/include/c++/4.9.2/bits/stl_algo.h:1967
#4  0x0000000000506a22 in std::sort<light*, bool (*)(light const&, light const&)> (__first=0x7ffda7c8f5c0, __last=0x7ffda7c8fdb8, __comp=
    0x5d6053 <light_compare_by_type(light const&, light const&)>)
    at /usr/include/c++/4.9.2/bits/stl_algo.h:4717
#5  0x000000000050457a in gr_opengl_deferred_lighting_finish ()
    at graphics/gropengldraw.cpp:3176
#6  0x0000000000771ee7 in obj_render_queue_all () at object/objectsort.cpp:405
---Type <return> to continue, or q <return> to quit---
#7  0x0000000000414481 in game_render_frame (cid=...)
    at freespace2/freespace.cpp:3746
#8  0x0000000000415bc7 in game_frame (paused=false)
    at freespace2/freespace.cpp:4527
#9  0x0000000000416760 in game_do_frame () at freespace2/freespace.cpp:4913
#10 0x000000000041888b in game_do_state (state=2)
    at freespace2/freespace.cpp:6596
#11 0x00000000004d45d7 in gameseq_process_events ()
    at gamesequence/gamesequence.cpp:409
#12 0x0000000000419622 in game_main (cmdline=0x23343e0 "-post_process")
    at freespace2/freespace.cpp:7163
#13 0x00000000004197ea in main (argc=31, argv=0x7ffda7c97578)
    at freespace2/freespace.cpp:7298