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Maniphest T77359

Crash: Adding UV's in edit-mode with linked duplicates
Closed, ResolvedPublicBUG
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Description

System Information
Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: GeForce GTX 660 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 441.87

Blender Version
Broken: version: 2.83.0, branch: master, commit date: 2020-06-03 14:38, hash: rB211b6c29f771
Happens in Blender 2.82a

Short description of error
Blender crashes when trying to unwrap using: U->Follow Active Quads
On instanced/linked object (Alt+D)
https://youtu.be/IwPARjhyfgA

Crash log:

FollowQuad-Crash.crash.txt1 KBDownload

Exact steps for others to reproduce the error

  • Open this attached file
  • Add UV or hit U->Follow Active Quads.

add_uv_bug.blend2 MBDownload

Revisions and Commits

rB Blender
rB79945c8126c6 Fix T77359: Crash adding UV's in edit-mode with linked duplicates
rB33ac3582bbd5 Fix T77359: Crash adding UV's in edit-mode with linked duplicates

Related Objects

Event Timeline

Adam (50p) created this task.Jun 4 2020, 11:37 AM
Chingiz Jumagulov (Krayzmond) added a subscriber: Chingiz Jumagulov (Krayzmond).Jun 4 2020, 11:51 AM

Strange, works fine for me on Windows 10 64 bits here.

Alaska (Alaska) added a subscriber: Alaska (Alaska).Jun 4 2020, 11:57 AM

Same here, no issues on Blender 2.83.0 with Linux.

Seeing as it also occurred in 2.82a for @Adam (50p) suggests it's a issue with their hardware or the file.

@Adam (50p) are you able to:

  1. Upload the .blend file.
  2. Upload crash information. This can be done by navigating to the Blender installation folder, run blender_debug_log.cmd, do what you need to get Blender to crash. Once it's crashed, a file explorer should open with two files, upload both of them to here.
Campbell Barton (campbellbarton) changed the task status from Needs Triage to Needs Information from User.Jun 4 2020, 2:03 PM
Campbell Barton (campbellbarton) added a subscriber: Campbell Barton (campbellbarton).

Please provide simple blend file to redo the error.

Adam (50p) added a comment.Jun 4 2020, 6:51 PM

Here is the file:

FollowQuad-Crash.blend2 MBDownload

Alaska (Alaska) added a comment.Jun 5 2020, 7:27 AM

I can reproduce the crash with the file provided. Will investigate further.

Alaska (Alaska) updated the task description. (Show Details)Jun 5 2020, 7:27 AM
Alaska (Alaska) changed the task status from Needs Information from User to Needs Triage.Jun 5 2020, 7:43 AM
Alaska (Alaska) updated the task description. (Show Details)

Upon further investigation, it has something to do with the bevel modifier, however I'm still having trouble reproducing the issue with a new file/object. Will continue the investigation.

Germano Cavalcante (mano-wii) changed the task status from Needs Triage to Confirmed.Jun 8 2020, 2:24 PM
Germano Cavalcante (mano-wii) changed the subtype of this task from "Report" to "Bug".
Germano Cavalcante (mano-wii) added a project: EEVEE & Viewport.
Germano Cavalcante (mano-wii) added a subscriber: Germano Cavalcante (mano-wii).

I can confirm. But I still don't know exactly what causes the problem.
It seems to be related to linked mesh, Modifiers and UV.

 	ucrtbased.dll!00007ffabda3fcb1()	Unknown
>	blender.exe!GPU_vertformat_safe_attr_name(const unsigned char * attr_name, unsigned char * r_safe_name, unsigned int UNUSED_max_len) Line 283	C
 	blender.exe!extract_uv_init(const MeshRenderData * mr, void * buf) Line 1844	C
 	blender.exe!extract_init(ExtractTaskData * data) Line 4633	C
 	blender.exe!extract_init_and_run(void * taskdata) Line 4656	C
 	blender.exe!extract_single_threaded_task_node_exec(void * task_data) Line 4727	C
 	blender.exe!TaskNode::run::__l2::<lambda>() Line 97	C++
 	blender.exe!tbb::interface7::internal::delegated_function<void <lambda>(void) const ,void>::operator()() Line 94	C++
 	[External Code]	
 	blender.exe!tbb::interface7::internal::isolate_impl<void,void <lambda>(void) const>(const TaskNode::run::__l2::void <lambda>(void) & f) Line 161	C++
 	blender.exe!tbb::interface7::this_task_arena::isolate<void <lambda>(void)>(const TaskNode::run::__l2::void <lambda>(void) & f) Line 396	C++
 	blender.exe!TaskNode::run(const tbb::flow::interface11::continue_msg UNUSED_input) Line 98	C++
 	[External Code]	
 	blender.exe!tbb::flow::interface11::internal::function_body_leaf<tbb::flow::interface11::continue_msg,tbb::flow::interface11::continue_msg,std::_Binder<std::_Unforced,tbb::flow::interface11::continue_msg (__cdecl TaskNode::*)(tbb::flow::interface11::continue_msg),TaskNode *,std::_Ph<1> const &>>::operator()(const tbb::flow::interface11::continue_msg & i) Line 147	C++
 	blender.exe!tbb::flow::interface11::internal::continue_input<tbb::flow::interface11::continue_msg,tbb::flow::interface11::internal::Policy<void>>::apply_body_bypass(tbb::flow::interface11::continue_msg __formal) Line 822	C++
 	blender.exe!tbb::flow::interface11::internal::apply_body_task_bypass<tbb::flow::interface11::internal::continue_input<tbb::flow::interface11::continue_msg,tbb::flow::interface11::internal::Policy<void>>,tbb::flow::interface11::continue_msg>::execute() Line 312	C++
 	[External Code]	
 	blender.exe!tbb::task::wait_for_all() Line 810	C++
 	blender.exe!tbb::flow::interface10::graph::wait_functor::operator()() Line 252	C++
 	blender.exe!tbb::interface7::internal::delegated_function<tbb::flow::interface10::graph::wait_functor const ,void>::operator()() Line 94	C++
 	[External Code]	
 	blender.exe!tbb::interface7::task_arena::execute_impl<void,tbb::flow::interface10::graph::wait_functor const>(const tbb::flow::interface10::graph::wait_functor & f) Line 217	C++
 	blender.exe!tbb::interface7::task_arena::execute<tbb::flow::interface10::graph::wait_functor>(const tbb::flow::interface10::graph::wait_functor & f) Line 357	C++
 	blender.exe!tbb::flow::interface10::graph::wait_for_all() Line 347	C++
 	blender.exe!BLI_task_graph_work_and_wait(TaskGraph * task_graph) Line 132	C++
 	blender.exe!DRW_mesh_batch_cache_create_requested(TaskGraph * task_graph, Object * ob, Mesh * me, const Scene * scene, const bool is_paint_mode, const bool use_hide) Line 1440	C
 	blender.exe!drw_batch_cache_generate_requested(Object * ob) Line 3539	C
 	blender.exe!drw_engines_cache_populate(Object * ob) Line 1019	C
 	blender.exe!DRW_draw_render_loop_ex(Depsgraph * depsgraph, RenderEngineType * engine_type, ARegion * region, View3D * v3d, GPUViewport * viewport, const bContext * evil_C) Line 1480	C
 	blender.exe!DRW_draw_view(const bContext * C) Line 1397	C
 	blender.exe!view3d_draw_view(const bContext * C, ARegion * region) Line 1609	C
 	blender.exe!view3d_main_region_draw(const bContext * C, ARegion * region) Line 1634	C
 	blender.exe!ED_region_do_draw(bContext * C, ARegion * region) Line 543	C
 	blender.exe!wm_draw_window_offscreen(bContext * C, wmWindow * win, bool stereo) Line 689	C
 	blender.exe!wm_draw_window(bContext * C, wmWindow * win) Line 812	C
 	blender.exe!wm_draw_update(bContext * C) Line 1013	C
 	blender.exe!WM_main(bContext * C) Line 482	C
 	blender.exe!main(int argc, const unsigned char * * UNUSED_argv_c) Line 530	C
 	[External Code]
Germano Cavalcante (mano-wii) updated the task description. (Show Details)Jun 8 2020, 2:27 PM
Clément Foucault (fclem) moved this task from Backlog to Bugs on the EEVEE & Viewport board.Jul 1 2020, 1:39 AM
Clément Foucault (fclem) added a project: Modeling.
Clément Foucault (fclem) added a subscriber: Clément Foucault (fclem).

The mesh itself seems to be the issue. If you run with --debug blender will complain about Invalid clnors in this fan!. I'm not sure if this is a DRW bug or a Bmesh one.

  • The crash also happens if you try to add a primitive mesh o the existing mesh (in edit mode > Shift + A > Add Cube).
  • Using another modifier (like subdiv) also crash.
  • Removing modifiers from BOTH instances fixes the issue.
Campbell Barton (campbellbarton) added a comment.Aug 5 2020, 2:26 PM

In the middle of looking into this, it seems there is a mix-up between the meshes, as the edit-meshes modifier result has UV's and the other object which isn't using the edit-mesh doesn't have UV's. Need to look into this further.

Uploaded a simplified test file.

FollowQuad-Crash_simple.blend2 MBDownload

Campbell Barton (campbellbarton) renamed this task from Crash 2.83: Unwrap - Follow Active Quads to Crash: Adding UV's in edit-mode.Aug 5 2020, 2:27 PM
Campbell Barton (campbellbarton) claimed this task.Aug 19 2020, 1:08 PM
Campbell Barton (campbellbarton) mentioned this in rBd09646a40b19: Fix T73095: Edit Mode Overlay Linked Mesh.Aug 20 2020, 1:05 AM
Campbell Barton (campbellbarton) mentioned this in D8645: Fix T77359: Crash adding UV's in edit-mode with linked duplicates.
Campbell Barton (campbellbarton) renamed this task from Crash: Adding UV's in edit-mode to Crash: Adding UV's in edit-mode with linked duplicates.Aug 20 2020, 1:19 AM
Jeroen Bakker (jbakker) added a subscriber: Jeroen Bakker (jbakker).Aug 25 2020, 8:54 AM

I have been testing https://developer.blender.org/P1596 and it solves the issue. I think it is good to be added to 2.90 (and 2.83)

Campbell Barton (campbellbarton) closed this task as Resolved by committing rB33ac3582bbd5: Fix T77359: Crash adding UV's in edit-mode with linked duplicates.Aug 25 2020, 3:56 PM
Campbell Barton (campbellbarton) added a commit: rB33ac3582bbd5: Fix T77359: Crash adding UV's in edit-mode with linked duplicates.
Jeroen Bakker (jbakker) mentioned this in T77348: Blender LTS: Maintenance Task.Aug 26 2020, 10:06 AM
Jeroen Bakker (jbakker) added a commit: rB79945c8126c6: Fix T77359: Crash adding UV's in edit-mode with linked duplicates.Aug 26 2020, 12:02 PM