#0  0x00007ffff4a0f4b5 in raise () from /lib/libc.so.6
#1  0x00007ffff4a12f50 in abort () from /lib/libc.so.6
#2  0x00007ffff4a47c97 in ?? () from /lib/libc.so.6
#3  0x00007ffff4a51dd6 in ?? () from /lib/libc.so.6
#4  0x00007ffff4a55452 in ?? () from /lib/libc.so.6
#5  0x00007ffff4a55e74 in calloc () from /lib/libc.so.6
#6  0x0000000001293bfb in MEM_callocN (len=44, str=0x1a07164 "RNA_parameter_list_create") at intern/guardedalloc/intern/mallocn.c:301
#7  0x0000000000c2055a in RNA_parameter_list_create (parms=0x7fffffffd840, ptr=0x4413c90, func=0x2326720) at source/blender/makesrna/intern/rna_access.c:3653
#8  0x00000000010e9937 in pyrna_func_call (self=0x320a680, args=0x44021d0, kw=0x447a660) at source/blender/python/intern/bpy_rna.c:2878
#9  0x00007ffff6d5b0d9 in PyEval_EvalFrameEx () from /usr/lib/libpython3.1.so.1.0
#10 0x00007ffff6d5c04f in PyEval_EvalCodeEx () from /usr/lib/libpython3.1.so.1.0
#11 0x00007ffff6cf96e4 in ?? () from /usr/lib/libpython3.1.so.1.0
#12 0x00007ffff6cd7309 in PyObject_Call () from /usr/lib/libpython3.1.so.1.0
#13 0x00000000010ebbfb in bpy_class_call (ptr=0x7fffffffdfa0, func=0x2323760, parms=0x7fffffffdf80) at source/blender/python/intern/bpy_rna.c:4008
#14 0x0000000000cb29e7 in panel_draw (C=0x2861ab0, pnl=0x4522440) at source/blender/makesrna/intern/rna_ui.c:110
#15 0x0000000000aa6bc6 in ED_region_panels (C=0x2861ab0, ar=0x4522130, vertical=1, context=0x19f84d3 "render", contextnr=0) at source/blender/editors/screen/area.c:1290
#16 0x0000000000b14aae in buttons_main_area_draw (C=0x2861ab0, ar=0x4522130) at source/blender/editors/space_buttons/space_buttons.c:160
#17 0x0000000000aa42d2 in ED_region_do_draw (C=0x2861ab0, ar=0x4522130) at source/blender/editors/screen/area.c:352
#18 0x00000000008778c2 in wm_method_draw_triple (C=0x2861ab0, win=0x44e1590) at source/blender/windowmanager/intern/wm_draw.c:577
#19 0x0000000000877df9 in wm_draw_update (C=0x2861ab0) at source/blender/windowmanager/intern/wm_draw.c:717
#20 0x000000000087945c in WM_main (C=0x2861ab0) at source/blender/windowmanager/intern/wm.c:331
#21 0x000000000087467f in main (argc=2, argv=0x7fffffffe348) at source/creator/creator.c:1038