Thread 1 "blender" received signal SIGSEGV, Segmentation fault.
0x0000000003e529d7 in get_constraint_expand_flag (C=0x7ffff70aaa88, 
    panel=0x7fffb5a02208)
    at /media/data/blender_guest/blender_master/source/blender/editors/interface/interface_templates.c:1925
1925	  return con->ui_expand_flag;
#0  0x0000000003e529d7 in get_constraint_expand_flag (C=0x7ffff70aaa88, 
    panel=0x7fffb5a02208)
    at /media/data/blender_guest/blender_master/source/blender/editors/interface/interface_templates.c:1925
#1  0x0000000003e303e9 in UI_panel_set_expand_from_list_data (
    C=0x7ffff70aaa88, panel=0x7fffb5a02208)
    at /media/data/blender_guest/blender_master/source/blender/editors/interface/interface_panel.c:538
#2  0x0000000003e52cb0 in uiTemplateConstraints (UNUSED_layout=0x7fffb5a02a08, 
    C=0x7ffff70aaa88, use_bone_constraints=false)
    at /media/data/blender_guest/blender_master/source/blender/editors/interface/interface_templates.c:2000
#3  0x0000000003811092 in UILayout_template_constraints_call (
    C=0x7ffff70aaa88, reports=0x7fffffffd660, _ptr=0x7fffbd53ed90, 
    _parms=0x7fffffffd610)
--Type <RET> for more, q to quit, c to continue without paging--
   er/makesrna/intern/rna_ui_gen.c:2705
#4  0x000000000363e691 in RNA_function_call (C=0x7ffff70aaa88, reports=0x7fffffffd660, ptr=0x7fffbd53ed90, 
    func=0x1110bc20 <rna_UILayout_template_constraints_func>, parms=0x7fffffffd610)
    at /media/data/blender_guest/blender_master/source/blender/makesrna/intern/rna_access.c:7493
#5  0x000000000387b6c3 in pyrna_func_call (self=0x7fffbd53ed80, args=0x7fffd0fbb050, kw=0x7fffbd2cfdc0)
    at /media/data/blender_guest/blender_master/source/blender/python/intern/bpy_rna.c:6326
#6  0x000000000b30c544 in _PyObject_FastCallKeywords (callable=0x7fffbd53ed80, stack=<optimised out>, 
    nargs=<optimised out>, kwnames=0x7fffc008d590) at Objects/call.c:199
#7  0x0000000002c79275 in call_function (kwnames=0x7fffc008d590, oparg=<optimised out>, pp_stack=<synthetic pointer>)
    at Python/ceval.c:4619
#8  _PyEval_EvalFrameDefault (f=<optimised out>, throwflag=<optimised out>) at Python/ceval.c:3139
#9  0x0000000002c753e0 in function_code_fastcall (co=co@entry=0x7fffc0089780, args=<optimised out>, 
    args@entry=0x7fffbd45d4c8, nargs=nargs@entry=2, globals=globals@entry=0x7fffc00f1dc0) at Objects/call.c:283
#10 0x000000000b30bde6 in _PyFunction_FastCallDict (func=0x7fffc00b1200, args=0x7fffbd45d4c8, nargs=2, kwargs=0x0)
    at Objects/call.c:322
#11 0x000000000387eb1c in bpy_class_call (C=0x7ffff70aaa88, ptr=0x7fffffffdca0, func=0x11114fe0 <rna_Panel_draw_func>, 
    parms=0x7fffffffdcc0) at /media/data/blender_guest/blender_master/source/blender/python/intern/bpy_rna.c:8505
#12 0x000000000380844b in panel_draw (C=0x7ffff70aaa88, panel=0x7fffb67b2d08)
    at /media/data/blender_guest/blender_master/source/blender/makesrna/intern/rna_ui.c:144
#13 0x00000000038b7529 in ed_panel_draw (C=0x7ffff70aaa88, area=0x7fffebb01488, region=0x7fffed477808, lb=0x7fffed477910, 
    pt=0x7fffc2dc5908, panel=0x7fffb67b2d08, w=427, em=20, vertical=true, unique_panel_str=0x0)
    at /media/data/blender_guest/blender_master/source/blender/editors/screen/area.c:2464
#14 0x00000000038b7e91 in ED_region_panels_layout_ex (C=0x7ffff70aaa88, region=0x7fffed477808, paneltypes=0x7fffed4bce98, 
--Type <RET> for more, q to quit, c to continue without paging--
    contexts=0x7fffffffe300, contextnr=11, vertical=true, category_override=0x0)
    at /media/data/blender_guest/blender_master/source/blender/editors/screen/area.c:2643
#15 0x000000000a60662e in buttons_main_region_layout_properties (C=0x7ffff70aaa88, sbuts=0x7fffed69f3c8, 
    region=0x7fffed477808)
    at /media/data/blender_guest/blender_master/source/blender/editors/space_buttons/space_buttons.c:205
#16 0x000000000a6066b1 in buttons_main_region_layout (C=0x7ffff70aaa88, region=0x7fffed477808)
    at /media/data/blender_guest/blender_master/source/blender/editors/space_buttons/space_buttons.c:218
#17 0x00000000038b133e in ED_region_do_layout (C=0x7ffff70aaa88, region=0x7fffed477808)
    at /media/data/blender_guest/blender_master/source/blender/editors/screen/area.c:504
#18 0x00000000031242f5 in wm_draw_window_offscreen (C=0x7ffff70aaa88, win=0x7fffed6a4308, stereo=false)
    at /media/data/blender_guest/blender_master/source/blender/windowmanager/intern/wm_draw.c:643
#19 0x0000000003124a2e in wm_draw_window (C=0x7ffff70aaa88, win=0x7fffed6a4308)
    at /media/data/blender_guest/blender_master/source/blender/windowmanager/intern/wm_draw.c:809
#20 0x00000000031250a9 in wm_draw_update (C=0x7ffff70aaa88)
    at /media/data/blender_guest/blender_master/source/blender/windowmanager/intern/wm_draw.c:1012
#21 0x0000000003121a1f in WM_main (C=0x7ffff70aaa88)
    at /media/data/blender_guest/blender_master/source/blender/windowmanager/intern/wm.c:481
#22 0x0000000002c80011 in main (argc=1, argv=0x7fffffffe608)
    at /media/data/blender_guest/blender_master/source/creator/creator.c:528
(gdb) 
(gdb) c
Continuing.
Writing: /tmp/blender.crash.txt

Thread 1 "blender" received signal SIGSEGV, Segmentation fault.
0x0000000003e529d7 in get_constraint_expand_flag (C=0x7ffff70aaa88, panel=0x7fffb5a02208)
    at /media/data/blender_guest/blender_master/source/blender/editors/interface/interface_templates.c:1925
1925	  return con->ui_expand_flag;
(gdb) c
Continuing.
Couldn't get registers: No such process.
Couldn't get registers: No such process.
(gdb) 
Program terminated with signal SIGSEGV, Segmentation fault.
The program no longer exists.