Crash when undo a loop cut #67902

New Issue

Danilo · 2019-07-29T21:26:57+02:00

Danilo commented

2019-07-29 21:26:57 +02:00

System Information
Operating system: Windows-10-10.0.17763 64 Bits
Graphics card: GeForce GTX 750/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 431.60

Blender Version
Broken: version: 2.80 (sub 75), branch: master, commit date: 2019-07-24 14:22, hash: 507ffee6e1

Short description of error
I was working on Blender and it crashed when I undoed a Loop Cut. I've tried to recreate the bug on a default file but I coudn't, so I deleated everything on the scene and left just a square.

Exact steps for others to reproduce the error
loop.blend

It happens randomly, just do a loop cut and undo it. Some times it happens on the first try, but I also get it with 30 tries.

Debug output:
blender_debug_output.txt

I don't know if it's related to #67454 , but it just happens with Loop Cut, I tried the same with Extrude and Bevel and it didn't crash.

**System Information** Operating system: Windows-10-10.0.17763 64 Bits Graphics card: GeForce GTX 750/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 431.60 **Blender Version** Broken: version: 2.80 (sub 75), branch: master, commit date: 2019-07-24 14:22, hash: `507ffee6e1` **Short description of error** I was working on Blender and it crashed when I undoed a Loop Cut. I've tried to recreate the bug on a default file but I coudn't, so I deleated everything on the scene and left just a square. **Exact steps for others to reproduce the error** [loop.blend](https://archive.blender.org/developer/F7636208/loop.blend) It happens randomly, just do a loop cut and undo it. Some times it happens on the first try, but I also get it with 30 tries. Debug output: [blender_debug_output.txt](https://archive.blender.org/developer/F7636212/blender_debug_output.txt) I don't know if it's related to [#67454 ](https://developer.blender.org/T67454), but it just happens with Loop Cut, I tried the same with Extrude and Bevel and it didn't crash.

Danilo commented

2019-07-29 21:26:57 +02:00

Added subscriber: @danilolc

blender-admin commented

2019-07-29 21:26:57 +02:00

#69568 was marked as duplicate of this issue

blender-admin commented

2019-07-29 21:26:57 +02:00

This issue was referenced by 3566b81c8b

This issue was referenced by 3566b81c8bfa8c69d542a5de29ecb8d5af3ccb3d

Marcin Twarowski commented

2019-07-30 09:57:32 +02:00

Added subscriber: @MarcinTwarowski

Marcin Twarowski commented

2019-07-30 09:57:32 +02:00

Can confirm. It doesn't happen when I use ctrl+r. Only when I use loop cut tool from the shelf.

blender_system_info.txt
blender_debug_output.txt

Error   : EXCEPTION_ACCESS_VIOLATION
Address : 0x00007FF79F9167B8

System Information
Operating system: Windows-10-10.0.16299 64 Bits
Graphics card: GeForce GTX 1080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 419.67

Blender Version
Broken: version: 2.80 (sub 75), branch: master, commit date: 2019-07-24 14:22, hash: 507ffee6e1

Can confirm. It doesn't happen when I use ctrl+r. Only when I use loop cut tool from the shelf. [blender_system_info.txt](https://archive.blender.org/developer/F7637090/blender_system_info.txt) [blender_debug_output.txt](https://archive.blender.org/developer/F7637089/blender_debug_output.txt) ``` Error : EXCEPTION_ACCESS_VIOLATION Address : 0x00007FF79F9167B8 ``` **System Information** Operating system: Windows-10-10.0.16299 64 Bits Graphics card: GeForce GTX 1080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 419.67 **Blender Version** Broken: version: 2.80 (sub 75), branch: master, commit date: 2019-07-24 14:22, hash: `507ffee6e1`

Philipp Oeser commented

2019-07-30 12:04:06 +02:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2019-07-30 12:04:06 +02:00

Unable to reproduce here (db0782e946, linux 5.1.16-300.fc30.x86_64, nvidia 970m 430.26 drivers)

does this still fail with a current build from https://builder.blender.org/download/?

Unable to reproduce here (db0782e946, linux 5.1.16-300.fc30.x86_64, nvidia 970m 430.26 drivers) - does this still fail with a current build from https://builder.blender.org/download/?

Marcin Twarowski commented

2019-07-30 12:23:04 +02:00

Just tested on 2.81 (sub 0), branch: master, commit date: 2019-07-29 20:43, hash: 1178046ed2
The problem is still there. Crash seems to happen only (or at least a lot more often) in wireframe mode.
blender_debug_output.txt

Just tested on 2.81 (sub 0), branch: master, commit date: 2019-07-29 20:43, hash: `1178046ed2` The problem is still there. Crash seems to happen only (or at least a lot more often) in wireframe mode. [blender_debug_output.txt](https://archive.blender.org/developer/F7637279/blender_debug_output.txt)

Ralf Dietrich commented

2019-07-30 12:33:28 +02:00

Added subscriber: @RalfDietrich

Ralf Dietrich commented

2019-07-30 12:33:28 +02:00

Can confirm. Happens too with 2.81 (See Video)

2019-07-30 12-27-17- Blender crash loopcut undo.mov

Can confirm. Happens too with 2.81 (See Video) [2019-07-30 12-27-17- Blender crash loopcut undo.mov](https://archive.blender.org/developer/F7637306/2019-07-30_12-27-17-_Blender_crash_loopcut_undo.mov)

Philipp Oeser commented

2019-07-30 12:34:04 +02:00

Well, I cant get it to crash, but maybe someone on windows can?

Ralf Dietrich commented

2019-07-30 12:39:33 +02:00

I posted a proof here just a few minutes ago as a video

Philipp Oeser commented

2019-07-30 12:43:48 +02:00

Ok, hammered it like a mad man [you have to be quick!] and could get it, too:

BMEdge *eed = BM_edge_at_index(data->vc.em->bm, index); will return garbage, asserts, too
BLI_assert failed: /blender/source/blender/bmesh/intern/bmesh_mesh.h:103, BM_edge_at_index(), at '(index >= 0) && (index < bm->totedge)'

1  _bm_elem_flag_test                   bmesh_inline.h                42   0x2dfce05 
2  mesh_foreachScreenEdge__mapFunc      view3d_iterators.c            201  0x2dfce05 
3  BKE_mesh_foreach_mapped_edge         mesh_iterators.c              82   0x207a93f 
4  mesh_foreachScreenEdge               view3d_iterators.c            257  0x2dfd09e 
5  EDBM_edge_find_nearest_ex            editmesh_select.c             653  0x2b7f458 
6  gizmo_preselect_edgering_test_select view3d_gizmo_preselect_type.c 308  0x2df8425 
7  gizmo_find_intersected_3d            wm_gizmo_map.c                642  0x2405cdf 
8  wm_gizmomap_highlight_find           wm_gizmo_map.c                754  0x2406142 
9  wm_handlers_do_intern                wm_event_system.c             2793 0x23ce408 
10 wm_handlers_do                       wm_event_system.c             2945 0x23cec23 
11 wm_event_do_handlers                 wm_event_system.c             3397 0x23d00cd 
12 WM_main                              wm.c                          417  0x23c397b 
13 main                                 creator.c                     500  0x1d83286

will check a little more...

Ok, hammered it like a mad man [you have to be quick!] and could get it, too: `BMEdge *eed = BM_edge_at_index(data->vc.em->bm, index);` will return garbage, asserts, too `BLI_assert failed: /blender/source/blender/bmesh/intern/bmesh_mesh.h:103, BM_edge_at_index(), at '(index >= 0) && (index < bm->totedge)'` ``` 1 _bm_elem_flag_test bmesh_inline.h 42 0x2dfce05 2 mesh_foreachScreenEdge__mapFunc view3d_iterators.c 201 0x2dfce05 3 BKE_mesh_foreach_mapped_edge mesh_iterators.c 82 0x207a93f 4 mesh_foreachScreenEdge view3d_iterators.c 257 0x2dfd09e 5 EDBM_edge_find_nearest_ex editmesh_select.c 653 0x2b7f458 6 gizmo_preselect_edgering_test_select view3d_gizmo_preselect_type.c 308 0x2df8425 7 gizmo_find_intersected_3d wm_gizmo_map.c 642 0x2405cdf 8 wm_gizmomap_highlight_find wm_gizmo_map.c 754 0x2406142 9 wm_handlers_do_intern wm_event_system.c 2793 0x23ce408 10 wm_handlers_do wm_event_system.c 2945 0x23cec23 11 wm_event_do_handlers wm_event_system.c 3397 0x23d00cd 12 WM_main wm.c 417 0x23c397b 13 main creator.c 500 0x1d83286 ``` will check a little more...

Sergey Sharybin was assigned by Philipp Oeser

2019-07-31 10:46:33 +02:00

Philipp Oeser commented

2019-07-31 10:46:33 +02:00

Added subscriber: @Sergey

Philipp Oeser commented

2019-07-31 10:46:33 +02:00

Since this is also fixed by D5343, will assign to @Sergey so he can close this along with the other reports when landing D5343...

Since this is also fixed by [D5343](https://archive.blender.org/developer/D5343), will assign to @Sergey so he can close this along with the other reports when landing [D5343](https://archive.blender.org/developer/D5343)...

Ralf Dietrich commented

2019-07-31 11:11:11 +02:00

Just checked if Bug is still open with nightly build (blender-2.81.0-git.af4dcc6073fa-windows64).

Blender ist still crashing after a few attempts ... so it is NOT fixed yet by D5343

Just checked if Bug is still open with nightly build (blender-2.81.0-git.af4dcc6073fa-windows64). Blender ist still crashing after a few attempts ... so it is NOT fixed yet by [D5343](https://archive.blender.org/developer/D5343)

Philipp Oeser commented

2019-07-31 11:41:21 +02:00

Well, D5343 has not landed yet [is still in review... but I applied the patch and tested...it seems to fix it :) ]

Well, [D5343](https://archive.blender.org/developer/D5343) has not landed yet [is still in review... but I applied the patch and tested...it seems to fix it :) ]

Sergey Sharybin commented

2019-07-31 16:55:38 +02:00

Changed status from 'Open' to: 'Resolved'

Sergey Sharybin closed this issue

2019-07-31 16:55:38 +02:00

Dalai Felinto commented

2019-09-17 16:51:14 +02:00

Added subscriber: @atarigsyah

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Crash when undo a loop cut #67902