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Regression: Geometry Nodes: Access Violation Exception when copying from Mesh with GPU Subdivision Surface Modifier #113377

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opened 2023-10-07 01:50:22 +02:00 by gummi · 6 comments
gummi commented 2023-10-07 01:50:22 +02:00
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System Information
Operating system: Windows 10 Pro
Graphics card: NVIDIA GeForce RTX 3060 Ti

Blender Version
Broken: version: 3.5.0 Alpha, branch: master, commit date: 2022-11-11 21:32, hash: rB03ccf37162d3
Worked: version: 3.5.0 Alpha, branch: master, commit date: 2022-11-10 21:29, hash: rBca1642cd0c5c

Short description of error

I was fiddling around with steps to reproduce an earlier report issues/113358, but stumbled across another way to crash blender with an access violation (might be related, might not). Setting up a scene where a base object has a subdivision modifier from which another object then copies causes a crash when you try to edit both at once. Other generative modifiers don't seem to be affected.

Interestingly, this crash does not occur when both objects have mesh data with the same layout (i.e. both are cubes/spheres/monkeys as created by the add mesh operator)

Steps to Crash

1.Open the file CopyDataCrash.blend.
2. Select Cube.001 and Outline.001 (the order doesn't seem to matter).
3. Try tabbing into edit mode.
4. at this point, blender should have crashed with an EXCEPTION_ACCESS_VIOLATION (Report CopyDataCrash.crash.txt attached).

The other cube+outline objects are included to show that only the subdivision surface modifier seems to be affected. Using the same steps on those groups does not produce a crash.

Workarounds
Any one of these will prevent a crash:

  1. Disabling Edit Mode Display of either the Subdivision Surface Modifier on Cube.001 or the Geometry Nodes on Outline.001.
  2. Applying either modifier.
  3. Adding a cube mesh to Outline.001 in edit mode (such that both Cube.001 and Outline.001 have the same amount/layout of faces).
System Information Operating system: Windows 10 Pro Graphics card: NVIDIA GeForce RTX 3060 Ti Blender Version Broken: version: 3.5.0 Alpha, branch: master, commit date: 2022-11-11 21:32, hash: `rB03ccf37162d3` Worked: version: 3.5.0 Alpha, branch: master, commit date: 2022-11-10 21:29, hash: `rBca1642cd0c5c` **Short description of error** I was fiddling around with steps to reproduce an earlier report [issues/113358](issues/113358), but stumbled across another way to crash blender with an access violation (might be related, might not). Setting up a scene where a base object has a subdivision modifier from which another object then copies causes a crash when you try to edit both at once. Other generative modifiers don't seem to be affected. Interestingly, this crash does not occur when both objects have mesh data with the same layout (i.e. both are cubes/spheres/monkeys as created by the add mesh operator) **Steps to Crash** 1.Open the file [CopyDataCrash.blend](/attachments/7fc6b354-a8d6-41ed-98b3-0cb7e8551ff4). 2. Select `Cube.001` and `Outline.001` (the order doesn't seem to matter). 3. Try tabbing into edit mode. 4. at this point, blender should have crashed with an `EXCEPTION_ACCESS_VIOLATION` (Report [CopyDataCrash.crash.txt](/attachments/ab1b6231-cdc5-4ce6-878d-ff85e2558e37) attached). The other cube+outline objects are included to show that only the subdivision surface modifier seems to be affected. Using the same steps on those groups does not produce a crash. **Workarounds** Any one of these will prevent a crash: 1. Disabling Edit Mode Display of either the Subdivision Surface Modifier on `Cube.001` or the Geometry Nodes on `Outline.001`. 2. Applying either modifier. 3. Adding a cube mesh to `Outline.001` in edit mode (such that both `Cube.001` and `Outline.001` have the same amount/layout of faces).
CopyDataCrash.crash.txt
31 KiB
CopyDataCrash.blend
951 KiB
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gummi added the
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 labels 2023-10-07 01:50:23 +02:00
Iliya Katueshenock commented 2023-10-07 14:01:30 +02:00
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CopyDataCrash Simple.blend
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Iliya Katueshenock changed title from Geometry Nodes | Access Violation Exception when copying from Mesh with Subdivision Surface Modifier to Regression: Geometry Nodes: Access Violation Exception when copying from Mesh with GPU Subdivision Surface Modifier 2023-10-07 14:16:13 +02:00
Iliya Katueshenock added this to the 3.6 LTS milestone 2023-10-07 14:17:37 +02:00
Iliya Katueshenock commented 2023-10-07 14:33:18 +02:00
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I really don't know who is causer, there are too many potential causes:

On the one hand, all this seems indirectly related, but at the same time i won’t say that anyone is definitely guilty, since it’s clearly not directly related.

I really don't know who is causer, there are too many potential causes: - 88c956c13be40aeaaf3828369ab63801413fef82 / @Jeroen-Bakker - ff7645c5edd211c5317b5fd9e6d0320c20667a21 / @HooglyBoogly - 6295bdfd38d3a4be8ee34ea6648473b4bbddf504 / @JacquesLucke On the one hand, all this seems indirectly related, but at the same time i won’t say that anyone is definitely guilty, since it’s clearly not directly related.
Jeroen Bakker commented 2023-10-09 08:53:00 +02:00
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88c956c13b should only impacts rendering, not viewport drawing. Has anyone been able to reproduce the issue? We could revert this commit and see if it still fails.

I agree that the other mentioned commits aren't directly related.

88c956c13be40aeaaf3828369ab63801413fef82 should only impacts rendering, not viewport drawing. Has anyone been able to reproduce the issue? We could revert this commit and see if it still fails. I agree that the other mentioned commits aren't directly related.
Jeroen Bakker commented 2023-10-09 14:51:45 +02:00
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Up to date call stack. (Blender 4.1)

__pthread_kill_implementation (@pthread_kill@@GLIBC_2.34:81)
__pthread_kill_internal (@pthread_kill@@GLIBC_2.34:59)
__GI___pthread_kill (@pthread_kill@@GLIBC_2.34:59)
__GI_raise (@raise:10)
__GI_abort (@abort:46)
_BLI_assert_abort (/home/jeroen/blender-git/blender/source/blender/blenlib/intern/BLI_assert.c:48)
BM_face_at_index (/home/jeroen/blender-git/blender/source/blender/bmesh/intern/bmesh_mesh.h:120)
bm_original_face_get (/home/jeroen/blender-git/blender/source/blender/draw/intern/mesh_extractors/extract_mesh.hh:190)
::draw_subdiv_cache_extra_coarse_face_data_mapped(Mesh *, BMesh *, MeshRenderData &, uint32_t *) (/home/jeroen/blender-git/blender/source/blender/draw/intern/draw_cache_impl_subdivision.cc:782)
::draw_subdiv_cache_update_extra_coarse_face_data(DRWSubdivCache &, Mesh *, MeshRenderData &) (/home/jeroen/blender-git/blender/source/blender/draw/intern/draw_cache_impl_subdivision.cc:815)
::draw_subdiv_create_requested_buffers(Object *, Mesh *, MeshBatchCache &, MeshBufferCache &, const bool, const bool, const bool, const float (*)[4], const bool, const bool, const bool, const ToolSettings *, const bool, OpenSubdiv_EvaluatorCache *) (/home/jeroen/blender-git/blender/source/blender/draw/intern/draw_cache_impl_subdivision.cc:2173)
::DRW_create_subdivision(Object *, Mesh *, MeshBatchCache &, MeshBufferCache *, const bool, const bool, const bool, const float (*)[4], const bool, const bool, const bool, const ToolSettings *, const bool) (/home/jeroen/blender-git/blender/source/blender/draw/intern/draw_cache_impl_subdivision.cc:2325)
DRW_mesh_batch_cache_create_requested(TaskGraph*, Object*, Mesh*, Scene const*, bool, bool) (/home/jeroen/blender-git/blender/source/blender/draw/intern/draw_cache_impl_mesh.cc:1900)
::drw_batch_cache_generate_requested(Object *) (/home/jeroen/blender-git/blender/source/blender/draw/intern/draw_cache.cc:3358)
::drw_engines_cache_populate(Object *) (/home/jeroen/blender-git/blender/source/blender/draw/intern/draw_manager_c.cc:1089)
::DRW_draw_render_loop_ex(Depsgraph *, RenderEngineType *, ARegion *, View3D *, GPUViewport *, const bContext *) (/home/jeroen/blender-git/blender/source/blender/draw/intern/draw_manager_c.cc:1728)
::DRW_draw_view(const bContext *) (/home/jeroen/blender-git/blender/source/blender/draw/intern/draw_manager_c.cc:1632)
::view3d_draw_view(const bContext *, ARegion *) (/home/jeroen/blender-git/blender/source/blender/editors/space_view3d/view3d_draw.cc:1595)
::view3d_main_region_draw(const bContext *, ARegion *) (/home/jeroen/blender-git/blender/source/blender/editors/space_view3d/view3d_draw.cc:1629)
ED_region_do_draw(bContext*, ARegion*) (/home/jeroen/blender-git/blender/source/blender/editors/screen/area.cc:532)

It seems like inconsistency in the data model.

Up to date call stack. (Blender 4.1) ``` __pthread_kill_implementation (@pthread_kill@@GLIBC_2.34:81) __pthread_kill_internal (@pthread_kill@@GLIBC_2.34:59) __GI___pthread_kill (@pthread_kill@@GLIBC_2.34:59) __GI_raise (@raise:10) __GI_abort (@abort:46) _BLI_assert_abort (/home/jeroen/blender-git/blender/source/blender/blenlib/intern/BLI_assert.c:48) BM_face_at_index (/home/jeroen/blender-git/blender/source/blender/bmesh/intern/bmesh_mesh.h:120) bm_original_face_get (/home/jeroen/blender-git/blender/source/blender/draw/intern/mesh_extractors/extract_mesh.hh:190) ::draw_subdiv_cache_extra_coarse_face_data_mapped(Mesh *, BMesh *, MeshRenderData &, uint32_t *) (/home/jeroen/blender-git/blender/source/blender/draw/intern/draw_cache_impl_subdivision.cc:782) ::draw_subdiv_cache_update_extra_coarse_face_data(DRWSubdivCache &, Mesh *, MeshRenderData &) (/home/jeroen/blender-git/blender/source/blender/draw/intern/draw_cache_impl_subdivision.cc:815) ::draw_subdiv_create_requested_buffers(Object *, Mesh *, MeshBatchCache &, MeshBufferCache &, const bool, const bool, const bool, const float (*)[4], const bool, const bool, const bool, const ToolSettings *, const bool, OpenSubdiv_EvaluatorCache *) (/home/jeroen/blender-git/blender/source/blender/draw/intern/draw_cache_impl_subdivision.cc:2173) ::DRW_create_subdivision(Object *, Mesh *, MeshBatchCache &, MeshBufferCache *, const bool, const bool, const bool, const float (*)[4], const bool, const bool, const bool, const ToolSettings *, const bool) (/home/jeroen/blender-git/blender/source/blender/draw/intern/draw_cache_impl_subdivision.cc:2325) DRW_mesh_batch_cache_create_requested(TaskGraph*, Object*, Mesh*, Scene const*, bool, bool) (/home/jeroen/blender-git/blender/source/blender/draw/intern/draw_cache_impl_mesh.cc:1900) ::drw_batch_cache_generate_requested(Object *) (/home/jeroen/blender-git/blender/source/blender/draw/intern/draw_cache.cc:3358) ::drw_engines_cache_populate(Object *) (/home/jeroen/blender-git/blender/source/blender/draw/intern/draw_manager_c.cc:1089) ::DRW_draw_render_loop_ex(Depsgraph *, RenderEngineType *, ARegion *, View3D *, GPUViewport *, const bContext *) (/home/jeroen/blender-git/blender/source/blender/draw/intern/draw_manager_c.cc:1728) ::DRW_draw_view(const bContext *) (/home/jeroen/blender-git/blender/source/blender/draw/intern/draw_manager_c.cc:1632) ::view3d_draw_view(const bContext *, ARegion *) (/home/jeroen/blender-git/blender/source/blender/editors/space_view3d/view3d_draw.cc:1595) ::view3d_main_region_draw(const bContext *, ARegion *) (/home/jeroen/blender-git/blender/source/blender/editors/space_view3d/view3d_draw.cc:1629) ED_region_do_draw(bContext*, ARegion*) (/home/jeroen/blender-git/blender/source/blender/editors/screen/area.cc:532) ``` It seems like inconsistency in the data model.
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Jeroen Bakker added
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Jeroen Bakker added this to the EEVEE & Viewport project 2023-10-09 14:59:51 +02:00
Jeroen Bakker commented 2023-10-09 15:00:21 +02:00
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I will assign it to EEVEE/Viewport module as the crash occurs there.

I will assign it to EEVEE/Viewport module as the crash occurs there.
Jeroen Bakker commented 2023-10-10 16:13:45 +02:00
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When switching to edit mode it seems like one bmesh instance doesn't match the mesh it represents. Its faces, edges and vertices are empty. Which crashes blender. So it might be that the input data isn't complete.

DRW_create_subdivision -> draw_subdiv_create_requested_buffers.

When switching to edit mode it seems like one bmesh instance doesn't match the mesh it represents. Its faces, edges and vertices are empty. Which crashes blender. So it might be that the input data isn't complete. `DRW_create_subdivision` -> `draw_subdiv_create_requested_buffers`.
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