Blender crash when adding an edge loop. #69906

New Issue

Lautaro Iglesias · 2019-09-15T17:25:45+02:00

Lautaro Iglesias commented

2019-09-15 17:25:45 +02:00

System Information
Operating system: Windows-7-6.1.7601-SP1 64 Bits
Graphics card: GeForce GTX 980 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 411.70

Blender Version
Broken: version: 2.81 (sub 11), branch: master, commit date: 2019-09-15 10:29, hash: 87c0179857

Short description of error
When i add an edge loop to a certain part of my mesh, Blender crash.

Exact steps for others to reproduce the error
Try to add an edge loop where the image indicates.

Loop_Bug.blend

Thanks.

**System Information** Operating system: Windows-7-6.1.7601-SP1 64 Bits Graphics card: GeForce GTX 980 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 411.70 **Blender Version** Broken: version: 2.81 (sub 11), branch: master, commit date: 2019-09-15 10:29, hash: `87c0179857` **Short description of error** When i add an edge loop to a certain part of my mesh, Blender crash. ![Capture.PNG](https://archive.blender.org/developer/F7748651/Capture.PNG) **Exact steps for others to reproduce the error** Try to add an edge loop where the image indicates. ![Capture.PNG](https://archive.blender.org/developer/F7748651/Capture.PNG) [Loop_Bug.blend](https://archive.blender.org/developer/F7748654/Loop_Bug.blend) Thanks.

Lautaro Iglesias commented

2019-09-15 17:25:45 +02:00

Added subscriber: @LautaroIglesias

Philipp Oeser commented

2019-09-15 18:17:17 +02:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2019-09-15 18:17:17 +02:00

Can confirm the crash here.

1   bm_loop_flip_disp            bmesh_interp.c     424  0x3662b30 
2   loop_interp_multires_cb      bmesh_interp.c     505  0x3662f93 
3   parallel_range_single_thread task.c             1144 0x308f3e7 
4   BLI_task_parallel_range      task.c             1211 0x308f7a5 
5   BM_loop_interp_multires_ex   bmesh_interp.c     567  0x36632c3 
6   BM_face_interp_multires_ex   bmesh_interp.c     598  0x36633ac 
7   BM_edge_split                bmesh_mods.c       666  0x372301d 
8   bm_subdivide_edge_addvert    bmo_subdivide.c    387  0x37c8418 
9   subdivide_edge_num           bmo_subdivide.c    437  0x37c8720 
10  bm_subdivide_multicut        bmo_subdivide.c    453  0x37c88fb 
11  bmo_subdivide_edges_exec     bmo_subdivide.c    1155 0x37ce26f 
12  BMO_op_exec                  bmesh_operators.c  223  0x36d64fe 
13  BM_mesh_esubdivide           bmo_subdivide.c    1372 0x37d4580 
14  ringsel_finish               editmesh_loopcut.c 183  0x3bc0b11 
15  loopcut_finish               editmesh_loopcut.c 505  0x3bc184c 
16  loopcut_modal                editmesh_loopcut.c 544  0x3bc1a93

First note: seems fine if

I remove the Basis shapekey OR
if I uncheck "relative" for it OR
if I select the Basis shapekey, select all vertices and do Vertex > Blend From Shape...

But this is only fighting on the surface, I wonder why this mesh has an CD_MDISPS layer...?
(the above fiddeling with the Basis shapekey might just be a way to get rid of this CD_MDISPS layer, not sure...)

Needs further investigation...

Can confirm the crash here. ``` 1 bm_loop_flip_disp bmesh_interp.c 424 0x3662b30 2 loop_interp_multires_cb bmesh_interp.c 505 0x3662f93 3 parallel_range_single_thread task.c 1144 0x308f3e7 4 BLI_task_parallel_range task.c 1211 0x308f7a5 5 BM_loop_interp_multires_ex bmesh_interp.c 567 0x36632c3 6 BM_face_interp_multires_ex bmesh_interp.c 598 0x36633ac 7 BM_edge_split bmesh_mods.c 666 0x372301d 8 bm_subdivide_edge_addvert bmo_subdivide.c 387 0x37c8418 9 subdivide_edge_num bmo_subdivide.c 437 0x37c8720 10 bm_subdivide_multicut bmo_subdivide.c 453 0x37c88fb 11 bmo_subdivide_edges_exec bmo_subdivide.c 1155 0x37ce26f 12 BMO_op_exec bmesh_operators.c 223 0x36d64fe 13 BM_mesh_esubdivide bmo_subdivide.c 1372 0x37d4580 14 ringsel_finish editmesh_loopcut.c 183 0x3bc0b11 15 loopcut_finish editmesh_loopcut.c 505 0x3bc184c 16 loopcut_modal editmesh_loopcut.c 544 0x3bc1a93 ``` First note: seems fine if - I remove the `Basis` shapekey OR - if I uncheck "relative" for it OR - if I select the `Basis` shapekey, select all vertices and do `Vertex` > `Blend From Shape`... But this is only fighting on the surface, I wonder why this mesh has an `CD_MDISPS` layer...? (the above fiddeling with the Basis shapekey might just be a way to get rid of this `CD_MDISPS` layer, not sure...) Needs further investigation...

Philipp Oeser commented

2019-09-16 14:01:26 +02:00

Note: this can also be fixed by just adding a multires modifier and removing it immediately after...

So question here is still: how come this mesh still has a CD_MDISPS layer?
@LautaroIglesias: do you have an idea how this could have happened? If there was a mutires modifier on this mesh, how was it removed?

Note: this can also be fixed by just adding a multires modifier and removing it immediately after... So question here is still: how come this mesh still has a `CD_MDISPS` layer? @LautaroIglesias: do you have an idea how this could have happened? If there was a mutires modifier on this mesh, how was it removed?

Bastien Montagne commented

2019-09-25 11:01:34 +02:00

Added subscriber: @mont29

Bastien Montagne commented

2019-09-25 11:01:34 +02:00

Changed status from 'Open' to: 'Archived'

Bastien Montagne closed this issue

2019-09-25 11:01:34 +02:00

Bastien Montagne self-assigned this 2019-09-25 11:01:34 +02:00

Bastien Montagne commented

2019-09-25 11:01:34 +02:00

More than a week without reply or activity. Due to the policy of the tracker archiving for until required info/data are provided.

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Blender crash when adding an edge loop. #69906