Crashes when undoing VSE #81250

New Issue

David · 2020-09-28T14:01:48+02:00

David commented

2020-09-28 14:01:48 +02:00

System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: GeForce RTX 2080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 452.06

Blender Version
Broken: version: 2.90.1, branch: master, commit date: 2020-09-23 06:43, hash: 3e85bb34d0
Worked: (newest version of Blender that worked as expected)

Short description of error
[Blender crashes when undo 2 to 5 times in a row. It can be with grease pencil or in pose mode ]

Exact steps for others to reproduce the error
[Load blender, Open file, Undo 2 to 5 times ]
[Based on the default startup or an attached .blend file (as simple as possible)]
Meryl - Copy.zip
2020-09-28 12-41-11.mkv

Meryl.blend

**System Information** Operating system: Windows-10-10.0.19041-SP0 64 Bits Graphics card: GeForce RTX 2080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 452.06 **Blender Version** Broken: version: 2.90.1, branch: master, commit date: 2020-09-23 06:43, hash: `3e85bb34d0` Worked: (newest version of Blender that worked as expected) **Short description of error** [Blender crashes when undo 2 to 5 times in a row. It can be with grease pencil or in pose mode ] **Exact steps for others to reproduce the error** [Load blender, Open file, Undo 2 to 5 times ] [Based on the default startup or an attached .blend file (as simple as possible)] [Meryl - Copy.zip](https://archive.blender.org/developer/F8931664/Meryl_-_Copy.zip) [2020-09-28 12-41-11.mkv](https://archive.blender.org/developer/F8931618/2020-09-28_12-41-11.mkv) [Meryl.blend](https://archive.blender.org/developer/F8931628/Meryl.blend)

David commented

2020-09-28 14:01:48 +02:00

Added subscriber: @daviddomingues

Philipp Oeser commented

2020-09-28 14:35:28 +02:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2020-09-28 14:35:28 +02:00

Changed status from 'Needs Triage' to: 'Needs User Info'

Philipp Oeser commented

2020-09-28 14:35:28 +02:00

Cannot reproduce from undoing.
I do get a crash though going to the constraints tab (that might be because of #81057 -- which is fixed already).

Can you check if you still have problems with a fresh build from https://builder.blender.org/download/?

Cannot reproduce from undoing. I do get a crash though going to the constraints tab (that might be because of #81057 -- which is fixed already). Can you check if you still have problems with a fresh build from https://builder.blender.org/download/?

David commented

2020-09-28 15:55:09 +02:00

I have reproduced it in the latest build blender-2.91.0-8c81b3fb8b9c-windows64

I tried with load factory settings and after loaded the file and it still crashed.

Is something to do with the file I just don't know how to troubleshot something like this.

I have reproduced it in the latest build blender-2.91.0-8c81b3fb8b9c-windows64 I tried with load factory settings and after loaded the file and it still crashed. Is something to do with the file I just don't know how to troubleshot something like this.

David commented

2020-09-28 16:00:27 +02:00

I was streaming at the time https://www.twitch.tv/videos/754481760 at around 28:00 time frame. It crashed back to back a couple of times.

Dalai Felinto commented

2020-09-28 16:47:32 +02:00

Added subscriber: @dfelinto

Dalai Felinto commented

2020-09-28 16:47:32 +02:00

@daviddomingues hi, could you please include steps on how to reproduce with your file?

For instance, just opening the file you can't even undo, so you must have done something before undoing. And although the video may show that, videos are welcome to illustrate some issues further, but not as the main source of truth (it is too time consuming to go through video reports).

@daviddomingues hi, could you please include steps on how to reproduce with your file? For instance, just opening the file you can't even undo, so you must have done something before undoing. And although the video may show that, videos are welcome to illustrate some issues further, but not as the main source of truth (it is too time consuming to go through video reports).

Marcin Twarowski commented

2020-09-28 17:10:12 +02:00

Added subscriber: @MarcinTwarowski

Marcin Twarowski commented

2020-09-28 17:10:12 +02:00

In the video @daviddomingues was using annotate tool. So I opened Meryl.blend and started to annotate and undo madly. It took couple of minutes but it eventually crashed. Log file is basically a very long list of warnings and then EXCEPTION_ACCESS_VIOLATION.
blender_debug_output.txt

System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: GeForce GTX 1080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 456.38

Blender Version
Broken: version: 2.91.0 Alpha, branch: master, commit date: 2020-09-26 20:04, hash: 8c81b3fb8b

In the video @daviddomingues was using annotate tool. So I opened Meryl.blend and started to annotate and undo madly. It took couple of minutes but it eventually crashed. Log file is basically a very long list of warnings and then EXCEPTION_ACCESS_VIOLATION. [blender_debug_output.txt](https://archive.blender.org/developer/F8932157/blender_debug_output.txt) > **System Information** > Operating system: Windows-10-10.0.19041-SP0 64 Bits > Graphics card: GeForce GTX 1080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 456.38 > > **Blender Version** > Broken: version: 2.91.0 Alpha, branch: master, commit date: 2020-09-26 20:04, hash: `8c81b3fb8b`

David commented

2020-09-28 17:31:05 +02:00

In #81250#1024797, @dfelinto wrote:
@daviddomingues hi, could you please include steps on how to reproduce with your file?

For instance, just opening the file you can't even undo, so you must have done something before undoing. And although the video may show that, videos are welcome to illustrate some issues further, but not as the main source of truth (it is too time consuming to go through video reports).

I understand that video are time consuming for the team to review. I just didn't know now to explain the bug. If there's no one else reporting something similar I would say that this is very specific to my file.

> In #81250#1024797, @dfelinto wrote: > @daviddomingues hi, could you please include steps on how to reproduce with your file? > > For instance, just opening the file you can't even undo, so you must have done something before undoing. And although the video may show that, videos are welcome to illustrate some issues further, but not as the main source of truth (it is too time consuming to go through video reports). I understand that video are time consuming for the team to review. I just didn't know now to explain the bug. If there's no one else reporting something similar I would say that this is very specific to my file.

Dalai Felinto commented

2020-09-28 18:18:24 +02:00

If you enable "Undo Legacy" in the Experimental features , does it still crash?

If you enable "Undo Legacy" in the [Experimental features ](https://docs.blender.org/manual/en/latest/render/cycles/features.html), does it still crash?

David commented

2020-09-28 19:25:08 +02:00

With the legacy undo it doesn't crash.

Ankit Meel commented

2020-10-07 09:29:19 +02:00

Changed status from 'Needs User Info' to: 'Needs Triage'

Richard Antalik commented

2020-10-07 11:35:42 +02:00

Added subscriber: @iss

Richard Antalik commented

2020-10-07 11:35:42 +02:00

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

Richard Antalik commented

2020-10-07 11:35:42 +02:00

Not sure if this is the only problem here, but I can reproduce crash in sequencer prefetching of all things.

Thread (crashed)
Exception thrown: read access violation. screen was 0xFFFFFFFFFFFFFF09.

>	blender.exe!seq_prefetch_is_scrubbing(Main * bmain) Line 101	C

 	blender.exe!seq_prefetch_need_suspend(PrefetchJob * pfjob) Line 416	C
 	blender.exe!seq_prefetch_do_suspend(PrefetchJob * pfjob) Line 424	C
 	blender.exe!seq_prefetch_frames(void * job) Line 468	C
 	blender.exe!tslot_thread_start(void * tslot_p) Line 232	C++
 	[External Code]

Main:

>	blender.exe!OCIOImpl::configGetProcessor(OCIO_ConstConfigRcPtr__ * * config, OCIO_ConstTransformRcPtr__ * * transform) Line 638	C++

 	blender.exe!OCIO_configGetProcessor(OCIO_ConstConfigRcPtr__ * * config, OCIO_ConstTransformRcPtr__ * * transform) Line 201	C++
 	blender.exe!create_display_buffer_processor(const unsigned char * look, const unsigned char * view_transform, const unsigned char * display, float exposure, float gamma, const unsigned char * from_colorspace, const bool linear_output) Line 918	C
 	blender.exe!update_glsl_display_processor(const ColorManagedViewSettings * view_settings, const ColorManagedDisplaySettings * display_settings, const unsigned char * from_colorspace) Line 4121	C
 	blender.exe!IMB_colormanagement_setup_glsl_draw_from_space(const ColorManagedViewSettings * view_settings, const ColorManagedDisplaySettings * display_settings, ColorSpace * from_colorspace, float dither, bool predivide, bool do_overlay_merge) Line 4180	C
 	blender.exe!IMB_colormanagement_setup_glsl_draw_from_space_ctx(const bContext * C, ColorSpace * from_colorspace, float dither, bool predivide) Line 4223	C
 	blender.exe!sequencer_OCIO_transform_ibuf(const bContext * C, ImBuf * ibuf, bool * r_glsl_used, eGPUTextureFormat * r_format, eGPUDataFormat * r_data) Line 1516	C
 	blender.exe!sequencer_draw_display_buffer(const bContext * C, Scene * scene, ARegion * region, SpaceSeq * sseq, ImBuf * ibuf, ImBuf * scope, bool draw_overlay, bool draw_backdrop) Line 1633	C
 	blender.exe!sequencer_draw_preview(const bContext * C, Scene * scene, ARegion * region, SpaceSeq * sseq, int cfra, int offset, bool draw_overlay, bool draw_backdrop) Line 1826	C
 	blender.exe!sequencer_preview_region_draw(const bContext * C, ARegion * region) Line 719	C
 	blender.exe!ED_region_do_draw(bContext * C, ARegion * region) Line 552	C
 	blender.exe!wm_draw_window_offscreen(bContext * C, wmWindow * win, bool stereo) Line 732	C
 	blender.exe!wm_draw_window(bContext * C, wmWindow * win) Line 871	C
 	blender.exe!wm_draw_update(bContext * C) Line 1072	C
 	blender.exe!WM_main(bContext * C) Line 489	C
 	blender.exe!main(int argc, const unsigned char * * UNUSED_argv_c) Line 523	C
 	[External Code]

This looks to me like race condition, it's not immediately evident how to resolve though. Will have a look at this. I am not sure how legacy undo would affect reproducibility here.

@daviddomingues Can you disabe prefetching in video sequencer and check if this crashes?
@MarcinTwarowski can you upload file C:\Users\TwaMa\AppData\Local\Temp\Meryl.crash.txt? to make sure this is only issue here?

To make sure this crashes it is important to draw and undo quickly, before prefetching is finished.

Not sure if this is the only problem here, but I can reproduce crash in sequencer prefetching of all things. Thread (crashed) `Exception thrown: read access violation. screen was 0xFFFFFFFFFFFFFF09.` ``` > blender.exe!seq_prefetch_is_scrubbing(Main * bmain) Line 101 C blender.exe!seq_prefetch_need_suspend(PrefetchJob * pfjob) Line 416 C blender.exe!seq_prefetch_do_suspend(PrefetchJob * pfjob) Line 424 C blender.exe!seq_prefetch_frames(void * job) Line 468 C blender.exe!tslot_thread_start(void * tslot_p) Line 232 C++ [External Code] ``` Main: ``` > blender.exe!OCIOImpl::configGetProcessor(OCIO_ConstConfigRcPtr__ * * config, OCIO_ConstTransformRcPtr__ * * transform) Line 638 C++ blender.exe!OCIO_configGetProcessor(OCIO_ConstConfigRcPtr__ * * config, OCIO_ConstTransformRcPtr__ * * transform) Line 201 C++ blender.exe!create_display_buffer_processor(const unsigned char * look, const unsigned char * view_transform, const unsigned char * display, float exposure, float gamma, const unsigned char * from_colorspace, const bool linear_output) Line 918 C blender.exe!update_glsl_display_processor(const ColorManagedViewSettings * view_settings, const ColorManagedDisplaySettings * display_settings, const unsigned char * from_colorspace) Line 4121 C blender.exe!IMB_colormanagement_setup_glsl_draw_from_space(const ColorManagedViewSettings * view_settings, const ColorManagedDisplaySettings * display_settings, ColorSpace * from_colorspace, float dither, bool predivide, bool do_overlay_merge) Line 4180 C blender.exe!IMB_colormanagement_setup_glsl_draw_from_space_ctx(const bContext * C, ColorSpace * from_colorspace, float dither, bool predivide) Line 4223 C blender.exe!sequencer_OCIO_transform_ibuf(const bContext * C, ImBuf * ibuf, bool * r_glsl_used, eGPUTextureFormat * r_format, eGPUDataFormat * r_data) Line 1516 C blender.exe!sequencer_draw_display_buffer(const bContext * C, Scene * scene, ARegion * region, SpaceSeq * sseq, ImBuf * ibuf, ImBuf * scope, bool draw_overlay, bool draw_backdrop) Line 1633 C blender.exe!sequencer_draw_preview(const bContext * C, Scene * scene, ARegion * region, SpaceSeq * sseq, int cfra, int offset, bool draw_overlay, bool draw_backdrop) Line 1826 C blender.exe!sequencer_preview_region_draw(const bContext * C, ARegion * region) Line 719 C blender.exe!ED_region_do_draw(bContext * C, ARegion * region) Line 552 C blender.exe!wm_draw_window_offscreen(bContext * C, wmWindow * win, bool stereo) Line 732 C blender.exe!wm_draw_window(bContext * C, wmWindow * win) Line 871 C blender.exe!wm_draw_update(bContext * C) Line 1072 C blender.exe!WM_main(bContext * C) Line 489 C blender.exe!main(int argc, const unsigned char * * UNUSED_argv_c) Line 523 C [External Code] ``` This looks to me like race condition, it's not immediately evident how to resolve though. Will have a look at this. I am not sure how legacy undo would affect reproducibility here. @daviddomingues Can you disabe prefetching in video sequencer and check if this crashes? @MarcinTwarowski can you upload file C:\Users\TwaMa\AppData\Local\Temp\Meryl.crash.txt? to make sure this is only issue here? To make sure this crashes it is important to draw and undo quickly, before prefetching is finished.

Marcin Twarowski commented

2020-10-07 11:58:46 +02:00

In #81250#1029681, @iss wrote:
@MarcinTwarowski can you upload file C:\Users\TwaMa\AppData\Local\Temp\Meryl.crash.txt? to make sure this is only issue here?

Here you go: Meryl.crash.txt

> In #81250#1029681, @iss wrote: > @MarcinTwarowski can you upload file C:\Users\TwaMa\AppData\Local\Temp\Meryl.crash.txt? to make sure this is only issue here? Here you go: [Meryl.crash.txt](https://archive.blender.org/developer/F8964278/Meryl.crash.txt)

Richard Antalik commented

2020-10-07 12:03:33 +02:00

@MarcinTwarowski Thanks, so yours was the same cause of crash.

Richard Antalik was assigned by Dalai Felinto

2020-10-16 11:23:40 +02:00

Dalai Felinto changed title from ~~Blender Crashes when undoing~~ to Crashes when undoing VSE

2020-10-16 11:40:14 +02:00

blender-admin commented

2020-10-26 00:28:54 +01:00

This issue was referenced by 8d1978a8e0

This issue was referenced by 8d1978a8e0131ab59e94e7e37e063db305166711

Richard Antalik commented

2020-10-26 00:35:22 +01:00

Changed status from 'Confirmed' to: 'Resolved'

Richard Antalik closed this issue

2020-10-26 00:35:22 +01:00

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Crashes when undoing VSE #81250