Regression: Sculpting on a linked copy of an objects crashes Blender #98889

New Issue

Steffen Hartmann · 2022-06-14T18:25:08+02:00

Steffen Hartmann commented

2022-06-14 18:25:08 +02:00

System Information
Operating system: Windows-10-10.0.19044-SP0 64 Bits
Graphics card: NVIDIA GeForce RTX 3060/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 512.96

Blender Version
Broken: version: 3.2.0, branch: master, commit date: 2022-06-08 10:22, hash: e05e1e3691
Worked: 3.2 alpha and mabye betas

This apparently started with eae36be372

Short description of error
Sculpting on a linked copy of an objects crashes Blender

Exact steps for others to reproduce the error

Open Blender
Create duplicate linked of default cube: {key Alt D}
In sculpt mode draw with brush on linked copy OR
switch to wireframe viewport shading mode and just enter sculptmode

(No crash when i sculpt on the original Object though.)

NVIDIA_Share_nm7AkRc7Ad.mp4

**System Information** Operating system: Windows-10-10.0.19044-SP0 64 Bits Graphics card: NVIDIA GeForce RTX 3060/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 512.96 **Blender Version** Broken: version: 3.2.0, branch: master, commit date: 2022-06-08 10:22, hash: `e05e1e3691` Worked: 3.2 alpha and mabye betas This apparently started with eae36be372 **Short description of error** Sculpting on a linked copy of an objects crashes Blender **Exact steps for others to reproduce the error** - Open Blender - Create duplicate linked of default cube: {key Alt D} - In sculpt mode draw with brush on linked copy OR - switch to wireframe viewport shading mode and just enter sculptmode (No crash when i sculpt on the original Object though.) [NVIDIA_Share_nm7AkRc7Ad.mp4](https://archive.blender.org/developer/F13202250/NVIDIA_Share_nm7AkRc7Ad.mp4)

Steffen Hartmann commented

2022-06-14 18:25:08 +02:00

Added subscriber: @Harti

blender-admin commented

2022-06-14 18:25:08 +02:00

#100840 was marked as duplicate of this issue

blender-admin commented

2022-06-14 18:25:08 +02:00

#98983 was marked as duplicate of this issue

Joseph Eagar commented

2022-06-14 19:46:50 +02:00

Added subscriber: @JosephEagar

Joseph Eagar commented

2022-06-14 19:46:50 +02:00

Looks like this is being caused by objects in sculpt mode not being assigned their own runtime mesh instance?

Pratik Borhade commented

2022-06-15 06:04:41 +02:00

Added subscriber: @PratikPB2123

Pratik Borhade commented

2022-06-15 06:04:41 +02:00

Changed status from 'Needs Triage' to: 'Confirmed'

Pratik Borhade commented

2022-06-15 06:04:41 +02:00

Hi, thanks for reporting. I can replicate the crash.
Will bisect just in case if that's needed

Hi, thanks for reporting. I can replicate the crash. Will bisect just in case if that's needed

Pratik Borhade changed title from ~~Sculpting on a linked copy of an objects crashes Blender~~ to Regression: Sculpting on a linked copy of an objects crashes Blender

2022-06-15 06:06:13 +02:00

Pratik Borhade commented

2022-06-15 06:15:16 +02:00

I'm not able to confirm crash in buildbot builds (3.2, 3.3)
Can redo only in lite build

blender.exe         :0x00007FF62F27DA90  GPU_batch_draw_advanced C:\Users\Pratik\Desktop\BlenderOSP\blender\source\blender\gpu\intern\gpu_batch.cc:252
blender.exe         :0x00007FF62E8740F0  draw_call_single_do C:\Users\Pratik\Desktop\BlenderOSP\blender\source\blender\draw\intern\draw_manager_exec.c:868
blender.exe         :0x00007FF62E874570  draw_shgroup C:\Users\Pratik\Desktop\BlenderOSP\blender\source\blender\draw\intern\draw_manager_exec.c:996
blender.exe         :0x00007FF62E873970  DRW_draw_pass C:\Users\Pratik\Desktop\BlenderOSP\blender\source\blender\draw\intern\draw_manager_exec.c:1217
blender.exe         :0x00007FF62E891CD0  workbench_draw_sample C:\Users\Pratik\Desktop\BlenderOSP\blender\source\blender\draw\engines\workbench\workbench_engine.c:542
blender.exe         :0x00007FF62E891250  workbench_draw_scene C:\Users\Pratik\Desktop\BlenderOSP\blender\source\blender\draw\engines\workbench\workbench_engine.c:618
blender.exe         :0x00007FF62E854F40  drw_engines_draw_scene C:\Users\Pratik\Desktop\BlenderOSP\blender\source\blender\draw\intern\draw_manager.c:1094
blender.exe         :0x00007FF62E851620  DRW_draw_render_loop_ex C:\Users\Pratik\Desktop\BlenderOSP\blender\source\blender\draw\intern\draw_manager.c:1717
blender.exe         :0x00007FF62E852710  DRW_draw_view C:\Users\Pratik\Desktop\BlenderOSP\blender\source\blender\draw\intern\draw_manager.c:1593
blender.exe         :0x00007FF62EF87BE0  view3d_main_region_draw C:\Users\Pratik\Desktop\BlenderOSP\blender\source\blender\editors\space_view3d\view3d_draw.c:1564
blender.exe         :0x00007FF62E3D9690  ED_region_do_draw C:\Users\Pratik\Desktop\BlenderOSP\blender\source\blender\editors\screen\area.c:547
blender.exe         :0x00007FF62E3C0230  wm_draw_window_offscreen C:\Users\Pratik\Desktop\BlenderOSP\blender\source\blender\windowmanager\intern\wm_draw.c:853
blender.exe         :0x00007FF62E3C0080  wm_draw_window C:\Users\Pratik\Desktop\BlenderOSP\blender\source\blender\windowmanager\intern\wm_draw.c:1020
blender.exe         :0x00007FF62E3BFB20  wm_draw_update C:\Users\Pratik\Desktop\BlenderOSP\blender\source\blender\windowmanager\intern\wm_draw.c:1231
blender.exe         :0x00007FF62E399A90  WM_main C:\Users\Pratik\Desktop\BlenderOSP\blender\source\blender\windowmanager\intern\wm.c:630
blender.exe         :0x00007FF62E395210  main C:\Users\Pratik\Desktop\BlenderOSP\blender\source\creator\creator.c:552
blender.exe         :0x00007FF62F5457F4  __scrt_common_main_seh d:\a01\_work\12\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl:288
KERNEL32.DLL        :0x00007FFEEFC27020  BaseThreadInitThunk
ntdll.dll           :0x00007FFEF0142630  RtlUserThreadStart

I'm not able to confirm crash in buildbot builds (3.2, 3.3) Can redo only in lite build ```lines=10 blender.exe :0x00007FF62F27DA90 GPU_batch_draw_advanced C:\Users\Pratik\Desktop\BlenderOSP\blender\source\blender\gpu\intern\gpu_batch.cc:252 blender.exe :0x00007FF62E8740F0 draw_call_single_do C:\Users\Pratik\Desktop\BlenderOSP\blender\source\blender\draw\intern\draw_manager_exec.c:868 blender.exe :0x00007FF62E874570 draw_shgroup C:\Users\Pratik\Desktop\BlenderOSP\blender\source\blender\draw\intern\draw_manager_exec.c:996 blender.exe :0x00007FF62E873970 DRW_draw_pass C:\Users\Pratik\Desktop\BlenderOSP\blender\source\blender\draw\intern\draw_manager_exec.c:1217 blender.exe :0x00007FF62E891CD0 workbench_draw_sample C:\Users\Pratik\Desktop\BlenderOSP\blender\source\blender\draw\engines\workbench\workbench_engine.c:542 blender.exe :0x00007FF62E891250 workbench_draw_scene C:\Users\Pratik\Desktop\BlenderOSP\blender\source\blender\draw\engines\workbench\workbench_engine.c:618 blender.exe :0x00007FF62E854F40 drw_engines_draw_scene C:\Users\Pratik\Desktop\BlenderOSP\blender\source\blender\draw\intern\draw_manager.c:1094 blender.exe :0x00007FF62E851620 DRW_draw_render_loop_ex C:\Users\Pratik\Desktop\BlenderOSP\blender\source\blender\draw\intern\draw_manager.c:1717 blender.exe :0x00007FF62E852710 DRW_draw_view C:\Users\Pratik\Desktop\BlenderOSP\blender\source\blender\draw\intern\draw_manager.c:1593 blender.exe :0x00007FF62EF87BE0 view3d_main_region_draw C:\Users\Pratik\Desktop\BlenderOSP\blender\source\blender\editors\space_view3d\view3d_draw.c:1564 blender.exe :0x00007FF62E3D9690 ED_region_do_draw C:\Users\Pratik\Desktop\BlenderOSP\blender\source\blender\editors\screen\area.c:547 blender.exe :0x00007FF62E3C0230 wm_draw_window_offscreen C:\Users\Pratik\Desktop\BlenderOSP\blender\source\blender\windowmanager\intern\wm_draw.c:853 blender.exe :0x00007FF62E3C0080 wm_draw_window C:\Users\Pratik\Desktop\BlenderOSP\blender\source\blender\windowmanager\intern\wm_draw.c:1020 blender.exe :0x00007FF62E3BFB20 wm_draw_update C:\Users\Pratik\Desktop\BlenderOSP\blender\source\blender\windowmanager\intern\wm_draw.c:1231 blender.exe :0x00007FF62E399A90 WM_main C:\Users\Pratik\Desktop\BlenderOSP\blender\source\blender\windowmanager\intern\wm.c:630 blender.exe :0x00007FF62E395210 main C:\Users\Pratik\Desktop\BlenderOSP\blender\source\creator\creator.c:552 blender.exe :0x00007FF62F5457F4 __scrt_common_main_seh d:\a01\_work\12\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl:288 KERNEL32.DLL :0x00007FFEEFC27020 BaseThreadInitThunk ntdll.dll :0x00007FFEF0142630 RtlUserThreadStart ```

Martijn Versteegh commented

2022-06-15 07:13:45 +02:00

Added subscriber: @Baardaap

Martijn Versteegh commented

2022-06-15 07:13:45 +02:00

Can't replicate in 3.2.0 release. Maybe it's an assert, which only fires in debug mode?

Martijn Versteegh commented

2022-06-15 08:34:40 +02:00

Can't replicate in a debug build (current master, 3.3 alpha, linux) either.

Pratik Borhade commented

2022-06-15 09:05:57 +02:00

@Baardaap, thanks for checking :)
No, not an assert hit. It's a crash which I can repro in lite debug build and also in lite ninja build

@Baardaap, thanks for checking :) No, not an assert hit. It's a crash which I can repro in lite debug build and also in lite ninja build

Pratik Borhade commented

2022-06-20 06:50:40 +02:00

Added subscriber: @Floatharr

Joseph Eagar commented

2022-06-22 11:18:15 +02:00

What's happening is that, during the draw cache build:

First linked duplicated builds a batch and inserts it into the draw cache.
Second duplicate that's in sculpt mode frees the batch built in step 1.
Since the batch is still in the draw cache the result is a crash.

If you put a breakpoint in DRW_mesh_batch_cache_validate you'll
see it clear the cache twice for the same me pointer when entering
sculpt mode.

What's happening is that, during the draw cache build: 1. First linked duplicated builds a batch and inserts it into the draw cache. 2. Second duplicate that's in sculpt mode frees the batch built in step 1. 3. Since the batch is still in the draw cache the result is a crash. If you put a breakpoint in `DRW_mesh_batch_cache_validate` you'll see it clear the cache twice for the same `me` pointer when entering sculpt mode.

Philipp Oeser commented

2022-06-22 22:06:08 +02:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2022-06-22 22:06:08 +02:00

Can also repro in master buildbot build (if you set viewport shading mode to wireframe).
This apparently started with eae36be372

Can also repro in master buildbot build (if you set viewport shading mode to wireframe). This apparently started with eae36be372

Thomas Dinges commented

2022-06-28 16:08:28 +02:00

Added subscriber: @ThomasDinges

Thomas Dinges commented

2022-06-28 16:08:28 +02:00

Blender 3.2.1 is scheduled for release soon. Any chance to fix this still? @JosephEagar

Joseph Eagar commented

2022-06-29 10:11:52 +02:00

I need someone from the viewport module to look at this. The sculpt object needs to always been its own independent part of the draw cache apart from any other objects that use the same underlying Mesh block.

Martijn Versteegh commented

2022-07-07 23:43:24 +02:00

Removed subscriber: @Baardaap

Luke Payne commented

2022-08-26 07:59:57 +02:00

Added subscriber: @holonet

Luke Payne commented

2022-08-26 07:59:57 +02:00

I have a slightly different trigger for this crash. Here's info:

System Information
Operating system: Windows-10-10.0.19044-SP0 64 Bits
Graphics card: NVIDIA GeForce RTX 3060/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 512.15

Blender Version
Broken: version: 3.2.2, branch: master, commit date: 2022-08-02 18:15, hash: bcfdb14560
Worked: (newest version of Blender that worked as expected)

So, in my case, I created 2 linked duplicates of the object. One of them, I made a change to (scaled). If I have that scaled-down duplicate selected, and then click the Sculpting workflow/tab, Blender crashes right away, before I would even try to sculpt on it. I noticed that, when playing around, if I clicked the linked dupe that I did not alter, it sometimes crashes...but the smaller dupe always crashes. I'm attaching the .blend file & the log file.LinkedDupeCrash.blend

LinkedDupe_SculptingCrash.crash.txt

I have a slightly different trigger for this crash. Here's info: **System Information** Operating system: Windows-10-10.0.19044-SP0 64 Bits Graphics card: NVIDIA GeForce RTX 3060/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 512.15 **Blender Version** Broken: version: 3.2.2, branch: master, commit date: 2022-08-02 18:15, hash: `bcfdb14560` Worked: (newest version of Blender that worked as expected) So, in my case, I created 2 linked duplicates of the object. One of them, I made a change to (scaled). If I have that scaled-down duplicate selected, and then click the Sculpting workflow/tab, Blender crashes right away, before I would even try to sculpt on it. I noticed that, when playing around, if I clicked the linked dupe that I did *not* alter, it *sometimes* crashes...but the smaller dupe always crashes. I'm attaching the .blend file & the log file.[LinkedDupeCrash.blend](https://archive.blender.org/developer/F13418073/LinkedDupeCrash.blend) [LinkedDupe_SculptingCrash.crash.txt](https://archive.blender.org/developer/F13418076/LinkedDupe_SculptingCrash.crash.txt)

Germano Cavalcante commented

2022-09-06 03:54:36 +02:00

Added subscribers: @TonatiuhdeSanJulian, @mano-wii

TheRedWaxPolice commented

2022-09-28 14:16:34 +02:00

Added subscriber: @TheRedWaxPolice

Steffen Hartmann commented

2022-10-12 11:26:59 +02:00

Don't know why but that bug (crash) is somewhat gone in my latest personal project. 2022-10-12 11-21-55.mp4
I get some weird blinking when sculpting on linked duplicates but not a crash.

When i copy the linked objects to a fresh file, Blender is crashing once i switch to sculpt mode.

edit: I deleted all other objects and isolated the linked objects. Test for yourself. no crash.blend
Feel free to also copy the objects to a fesh Blender project and see if you get an instant crash like me.

Don't know why but that bug (crash) is somewhat gone in my latest personal project. [2022-10-12 11-21-55.mp4](https://archive.blender.org/developer/F13665986/2022-10-12_11-21-55.mp4) I get some weird blinking when sculpting on linked duplicates but not a crash. When i copy the linked objects to a fresh file, Blender is crashing once i switch to sculpt mode. edit: I deleted all other objects and isolated the linked objects. Test for yourself. [no crash.blend](https://archive.blender.org/developer/F13666038/no_crash.blend) Feel free to also copy the objects to a fesh Blender project and see if you get an instant crash like me.

Julien Kaspar commented

2022-10-13 12:52:55 +02:00

Added subscriber: @JulienKaspar

Julien Kaspar commented

2022-10-13 12:52:55 +02:00

I can still reproduce the crash on Linux with the no_crash.blend file and there are still viewport flickering issues in general.

I can still reproduce the crash on Linux with the `no_crash.blend` file and there are still viewport flickering issues in general.

Steffen Hartmann commented

2022-10-16 10:20:42 +02:00

The bug (crash and blinking) seems to be fixed in latest 3.4 alphas. Can someone else confirm this?

TheRedWaxPolice commented

2022-10-16 13:52:52 +02:00

In #98889#1432931, @Harti wrote:
The bug (crash and blinking) seems to be fixed in latest 3.4 alphas. Can someone else confirm this?

No crash or blinking here either... so yeah...

> In #98889#1432931, @Harti wrote: > The bug (crash and blinking) seems to be fixed in latest 3.4 alphas. Can someone else confirm this? No crash or blinking here either... so yeah...

Julien Kaspar commented

2022-10-16 15:58:07 +02:00

I can still reproduce the crash, especially in the no_crash.blend provided in the comments. For me it's necessary to select a different object and enter sculpt mode to cause the crash.
But I can confirm that the visual glitches in general are fixed.

I can still reproduce the crash, especially in the `no_crash.blend` provided in the comments. For me it's necessary to select a different object and enter sculpt mode to cause the crash. But I can confirm that the visual glitches in general are fixed.

Joseph Eagar commented

2022-10-16 20:58:56 +02:00

I can't reproduce the crash.