**System Information**
64-bit Fedora 22 and NVIDIA ION
**Blender Version**
Broken: 2.76 dd185bf (local build from git with debug info)
**Short description of error**
Blender crashes with segmentation fault when showing hidden objects with alt+h.
**Exact steps for others to reproduce the error**
Exact steps to reproduce are still bit unclear, but seems to happen quite easily when editing my current project and has always occurred after pressing alt+h.
Here's a full backtrace of the segfault:
(gdb) bt full
#0 0x000000000222656a in BIF_draw_manipulator (C=0xb0e53c8)
at /home/pltsi/Blender/blender.git/source/blender/editors/transform/transform_manipulator.c:1636
gpd = 0x0
ob = 0x0
sa = 0xce336c8
ar = 0xce36878
scene = 0xf4e16f8
v3d = 0xce36da8
rv3d = 0xce36a08
totsel = 2
is_picksel = false
#1 0x0000000002141b54 in view3d_draw_objects (C=0xb0e53c8, scene=0xf4e16f8, v3d=0xce36da8,
ar=0xce36878, grid_unit=0x7fffeda87110, do_bgpic=true, draw_offscreen=false, fx=0x0)
at /home/pltsi/Blender/blender.git/source/blender/editors/space_view3d/view3d_draw.c:2894
rv3d = 0xce36a08
base = 0x0
do_camera_frame = true
draw_grids = true
draw_floor = true
draw_grids_after = false
do_composite_xray = false
xrayclear = true
#2 0x0000000002144a19 in view3d_main_region_draw_objects (C=0xb0e53c8, scene=0xf4e16f8,
v3d=0xce36da8, ar=0xce36878, grid_unit=0x7fffeda87110)
at /home/pltsi/Blender/blender.git/source/blender/editors/space_view3d/view3d_draw.c:3892
win = 0xce15fc8
rv3d = 0xce36a08
lay_used = 14383
do_compositing = false
#3 0x00000000021450d4 in view3d_main_region_draw (C=0xb0e53c8, ar=0xce36878)
at /home/pltsi/Blender/blender.git/source/blender/editors/space_view3d/view3d_draw.c:4041
scene = 0xf4e16f8
v3d = 0xce36da8
grid_unit = 0x0
border_rect = {xmin = -1138501878, xmax = -1138501878, ymin = 1147748352,
ymax = 1150713856}
render_border = false
clip_border = false
#4 0x0000000002577aaf in ED_region_do_draw (C=0xb0e53c8, ar=0xce36878)
at /home/pltsi/Blender/blender.git/source/blender/editors/screen/area.c:518
win = 0xce15fc8
---Type <return> to continue, or q <return> to quit---
sa = 0xce336c8
at = 0xb3913e8
scissor_pad = true
#5 0x0000000002021a40 in wm_method_draw_triple (C=0xb0e53c8, win=0xce15fc8)
at /home/pltsi/Blender/blender.git/source/blender/windowmanager/intern/wm_draw.c:556
wm = 0xce15e58
triple = 0xced40d8
dd = 0x0
dd_next = 0x7fffeda871e0
drawdata = 0xce54918
screen = 0xce235b8
sa = 0xce336c8
ar = 0xce36878
copytex = 1
#6 0x00000000020229e9 in wm_draw_update (C=0xb0e53c8)
at /home/pltsi/Blender/blender.git/source/blender/windowmanager/intern/wm_draw.c:958
wm = 0xce15e58
win = 0xce15fc8
drawmethod = 0
#7 0x000000000201c3bf in WM_main (C=0xb0e53c8)
at /home/pltsi/Blender/blender.git/source/blender/windowmanager/intern/wm.c:495
No locals.
#8 0x000000000201b50a in main (argc=1, argv=0x7fffeda87388)
at /home/pltsi/Blender/blender.git/source/creator/creator.c:2097
C = 0xb0e53c8
syshandle = 0xb1b5be0
ba = 0xb0f5d88
Line causing the segfault is here:
(gdb) list
1631 bGPdata *gpd = CTX_data_gpencil_data(C);
1632 Object *ob = OBACT;
1633
1634 if (((v3d->around == V3D_AROUND_ACTIVE) && (scene->obedit == NULL)) &&
1635 ((gpd == NULL) || !(gpd->flag & GP_DATA_STROKE_EDITMODE)) &&
1636 (!(ob->mode & OB_MODE_POSE)))
1637 {
1638 copy_v3_v3(rv3d->twmat[3], ob->obmat[3]);
1639 }
1640 else {
As ob is NULL, it's the ob->mode reference.
According to git, the ob NULL check was removed in Grease Pencil: Merge GPencil_Editing_Stage3 branch into master commit