Blender crashes if an object has a subdivision surface modifier and a displacement modifier linked to vertex group when switching to weight paint mode #59334

New Issue

Stephen · 2018-12-13T21:55:26+01:00

Stephen commented

2018-12-13 21:55:26 +01:00

System Information
Operating system: Windows 10 Pro N 64-bit
Graphics card: NVidia GTX1070

Blender Version
Broken: 2.80 2018-12-13 14:31 33993c056a
(example: 2.79b release)
(example: 2.80, edbf15d3c0, blender2.8, 2018-11-28, as found on the splash screen)
Worked: (optional)

Short description of error
Blender crashes when switching to weight paint, vertext paint or sculpt mode when subsurface modifier active and displacement modifier linked to the vertex group is active.
Object/edit/texture paint work fine.
If you apply the subdivision surface modifier then it doesn't crash.

Exact steps for others to reproduce the errorvertex group displacement.blend
Based on the default startup or an attached .blend file (as simple as possible).
Open attached blend file, switch to weight paint, vertex paint or scult mode.

**System Information** Operating system: Windows 10 Pro N 64-bit Graphics card: NVidia GTX1070 **Blender Version** Broken: 2.80 2018-12-13 14:31 33993c056a5 (example: 2.79b release) (example: 2.80, edbf15d3c044, blender2.8, 2018-11-28, as found on the splash screen) Worked: (optional) **Short description of error** Blender crashes when switching to weight paint, vertext paint or sculpt mode when subsurface modifier active and displacement modifier linked to the vertex group is active. Object/edit/texture paint work fine. If you apply the subdivision surface modifier then it doesn't crash. **Exact steps for others to reproduce the error**[vertex group displacement.blend](https://archive.blender.org/developer/F5946292/vertex_group_displacement.blend) Based on the default startup or an attached .blend file (as simple as possible). Open attached blend file, switch to weight paint, vertex paint or scult mode.

Stephen commented

2018-12-13 21:55:26 +01:00

Added subscriber: @stephenjenkins42

blender-admin commented

2018-12-13 21:55:26 +01:00

#59278 was marked as duplicate of this issue

blender-admin commented

2018-12-13 21:55:26 +01:00

#59364 was marked as duplicate of this issue

Sebastian Parborg commented

2018-12-14 15:11:28 +01:00

Added subscribers: @tombambadil, @Sergey, @ZedDB

Sergey Sharybin was assigned by Sebastian Parborg

2018-12-14 15:12:55 +01:00

Sebastian Parborg commented

2018-12-14 15:12:55 +01:00

I get an assert in my debug build:

BLI_assert failed: /home/zed/programmering/blender_master/blender/source/blender/modifiers/intern/MOD_util.c:233, MOD_deform_mesh_eval_get(), at 'mesh == ((void *)0) || mesh->totvert == num_verts'

And in my release build, I get this back trace:

Thread 1 "blender" received signal SIGFPE, Arithmetic exception.
0x0000555556bc3dcc in MEM_lockfree_freeN ()
(gdb) bt
- 0  0x0000555556bc3dcc in MEM_lockfree_freeN ()
- 1  0x000055555673409a in BKE_crazyspace_build_sculpt ()
- 2  0x00005555567eac03 in BKE_sculpt_update_mesh_elements ()
- 3  0x00005555563ab611 in ed_vwpaintmode_enter_generic ()
- 4  0x00005555563b3d90 in wpaint_mode_toggle_exec ()
- 5  0x0000555556082cec in wm_operator_invoke ()
- 6  0x0000555556083278 in wm_operator_call_internal ()
- 7  0x000055555608363a in WM_operator_name_call_ptr ()
- 8  0x00005555562e32ab in object_mode_set_exec ()
- 9  0x0000555556082cec in wm_operator_invoke ()
- 10 0x0000555556083278 in wm_operator_call_internal ()
- 11 0x000055555608363a in WM_operator_name_call_ptr ()
- 12 0x000055555622eb2d in ui_apply_but_funcs_after ()
- 13 0x000055555623ed9c in ui_handler_region_menu ()
- 14 0x0000555556085f0a in wm_handlers_do_intern ()
- 15 0x00005555560868cc in wm_handlers_do ()
- 16 0x00005555560870b4 in wm_event_do_handlers ()
- 17 0x000055555607e9c0 in WM_main ()
#18 0x000055555606ab2b in main ()

I'm guessing this is a depsgraph issue because of the assert in eval_get

I get an assert in my debug build: ``` BLI_assert failed: /home/zed/programmering/blender_master/blender/source/blender/modifiers/intern/MOD_util.c:233, MOD_deform_mesh_eval_get(), at 'mesh == ((void *)0) || mesh->totvert == num_verts' ``` And in my release build, I get this back trace: ``` Thread 1 "blender" received signal SIGFPE, Arithmetic exception. 0x0000555556bc3dcc in MEM_lockfree_freeN () (gdb) bt - 0 0x0000555556bc3dcc in MEM_lockfree_freeN () - 1 0x000055555673409a in BKE_crazyspace_build_sculpt () - 2 0x00005555567eac03 in BKE_sculpt_update_mesh_elements () - 3 0x00005555563ab611 in ed_vwpaintmode_enter_generic () - 4 0x00005555563b3d90 in wpaint_mode_toggle_exec () - 5 0x0000555556082cec in wm_operator_invoke () - 6 0x0000555556083278 in wm_operator_call_internal () - 7 0x000055555608363a in WM_operator_name_call_ptr () - 8 0x00005555562e32ab in object_mode_set_exec () - 9 0x0000555556082cec in wm_operator_invoke () - 10 0x0000555556083278 in wm_operator_call_internal () - 11 0x000055555608363a in WM_operator_name_call_ptr () - 12 0x000055555622eb2d in ui_apply_but_funcs_after () - 13 0x000055555623ed9c in ui_handler_region_menu () - 14 0x0000555556085f0a in wm_handlers_do_intern () - 15 0x00005555560868cc in wm_handlers_do () - 16 0x00005555560870b4 in wm_event_do_handlers () - 17 0x000055555607e9c0 in WM_main () #18 0x000055555606ab2b in main () ``` I'm guessing this is a depsgraph issue because of the assert in eval_get

blender-admin commented

2018-12-14 16:07:29 +01:00

This issue was referenced by f85b05111f

This issue was referenced by f85b05111fa4b96228a4a3969945c80fbb67f499

Sergey Sharybin commented

2018-12-14 16:08:25 +01:00

Changed status from 'Open' to: 'Resolved'

Sergey Sharybin closed this issue

2018-12-14 16:08:25 +01:00

Sebastian Parborg commented

2018-12-14 17:27:36 +01:00

Added subscriber: @JimDriscoll

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Blender crashes if an object has a subdivision surface modifier and a displacement modifier linked to vertex group when switching to weight paint mode #59334