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Blender crash when disabling BlenderKit addon while viewport is in "solid" shading mode #73467

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opened 2020-01-28 22:11:05 +01:00 by Casey Connor · 10 comments
Casey Connor commented 2020-01-28 22:11:05 +01:00
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(There are other bugs with BlenderKit that I'll report, but since this one crashes Blender, I assumed this is a Blender bug?)

System Information
Operating system: Linux-4.18.0-25-generic-x86_64-with-debian-buster-sid 64 Bits
Graphics card: GeForce GTX 1060 6GB/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 390.116

Blender Version
Broken: version: 2.83 (sub 1), branch: master, commit date: 2020-01-28 16:02, hash: blender/blender@a5790b2656

Short description of error

Blender crashes when enabling BlenderKit and then disabling it, e.g. if clicking a few times on the enable/disable checkbox

Exact steps for others to reproduce the error

  • start blender with fresh config directory
  • open prefs, go to Add-Ons, enter "blenderkit" in the filter field
  • enable addon with the checkbox, then disable it
  • Blender crashes:

Blender 2.83 (sub 1), Commit date: 2020-01-28 16:02, Hash a5790b26563c

bpy.data.window_managers["WinMan"].addon_search = "blenderkit" # Property

backtrace

/path/to/blender/blender-2.83-a5790b26563c-linux-glibc217-x86_64/blender(BLI_system_backtrace+0x1d) [0x6fc38ad]
/path/to/blender/blender-2.83-a5790b26563c-linux-glibc217-x86_64/blender() [0x16582a2]
/lib/x86_64-linux-gnu/libc.so.6(+0x41100) [0x7ff241d23100]
[0x7ff20ee48070]

Update: this seems to happen only in "solid" shading mode in the viewport. If I switch to e.g. Material Preview, the crash doesn't seem to happen.

(There are other bugs with BlenderKit that I'll report, but since this one crashes Blender, I assumed this is a Blender bug?) **System Information** Operating system: Linux-4.18.0-25-generic-x86_64-with-debian-buster-sid 64 Bits Graphics card: GeForce GTX 1060 6GB/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 390.116 **Blender Version** Broken: version: 2.83 (sub 1), branch: master, commit date: 2020-01-28 16:02, hash: `blender/blender@a5790b2656` **Short description of error** Blender crashes when enabling BlenderKit and then disabling it, e.g. if clicking a few times on the enable/disable checkbox **Exact steps for others to reproduce the error** * start blender with fresh config directory * open prefs, go to Add-Ons, enter "blenderkit" in the filter field * enable addon with the checkbox, then disable it * Blender crashes: # Blender 2.83 (sub 1), Commit date: 2020-01-28 16:02, Hash a5790b26563c bpy.data.window_managers["WinMan"].addon_search = "blenderkit" # Property # backtrace /path/to/blender/blender-2.83-a5790b26563c-linux-glibc217-x86_64/blender(BLI_system_backtrace+0x1d) [0x6fc38ad] /path/to/blender/blender-2.83-a5790b26563c-linux-glibc217-x86_64/blender() [0x16582a2] /lib/x86_64-linux-gnu/libc.so.6(+0x41100) [0x7ff241d23100] [0x7ff20ee48070] --------------------------------- Update: this seems to happen only in "solid" shading mode in the viewport. If I switch to e.g. Material Preview, the crash doesn't seem to happen.
Casey Connor commented 2020-01-28 22:11:05 +01:00
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Added subscriber: @clepsydrae

Added subscriber: @clepsydrae
Casey Connor changed title from Blender crash when disabling BlenderKit addon to Blender crash when disabling BlenderKit addon while viewport is in "solid" shading mode 2020-01-28 22:24:23 +01:00
Julian Eisel commented 2020-01-29 11:42:44 +01:00
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Added subscriber: @JulianEisel

Added subscriber: @JulianEisel
Julian Eisel commented 2020-01-29 11:42:44 +01:00
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Tried, but was not able to reproduce this, even with given commit. Even with ASan enabled, which should definitely cause a crash or warning on illegal memory usage.

Tried, but was not able to reproduce this, even with given commit. Even with ASan enabled, which should definitely cause a crash or warning on illegal memory usage.
Casey Connor commented 2020-01-29 22:07:46 +01:00
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I can't reproduce it on my other Linux system either (old/slow Lubuntu netbook) but it happens every time on my Kubuntu desktop... anything else I can do to help explore this?

I don't think this will help given what I've heard from devs, and I don't know anything about all this, but following some online instructions I went down this gdb hole, in case there are any clues in here somewhere: blenderkitcrash.txt

I can't reproduce it on my other Linux system either (old/slow Lubuntu netbook) but it happens every time on my Kubuntu desktop... anything else I can do to help explore this? I don't think this will help given what I've heard from devs, and I don't know anything about all this, but following some online instructions I went down this gdb hole, in case there are any clues in here somewhere: [blenderkitcrash.txt](https://archive.blender.org/developer/F8312421/blenderkitcrash.txt)
Vilem Duha commented 2020-02-06 18:28:45 +01:00
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Added subscriber: @VilemDuha

Added subscriber: @VilemDuha
Vilem Duha commented 2020-02-06 18:28:45 +01:00
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I actually experienced this bug too and I hope I already fixed it in BlenderKit.

But it's actually some registration bug that is specific to Blender. I found out that it happens due to un-registation unregistering BlenderKit properties before unregistering the UI - then a menu draw call crashed Blender. Now I check in the ui draw code if the addon is registered - this hopefully fixed the problem.

I actually experienced this bug too and I hope I already fixed it in BlenderKit. But it's actually some registration bug that is specific to Blender. I found out that it happens due to un-registation unregistering BlenderKit properties before unregistering the UI - then a menu draw call crashed Blender. Now I check in the ui draw code if the addon is registered - this hopefully fixed the problem.
Casey Connor commented 2020-02-06 21:37:33 +01:00
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Yeah, downloaded the latest (cad09e5227df) and no more crash! Thanks!

Yeah, downloaded the latest (cad09e5227df) and no more crash! Thanks!
Germano Cavalcante commented 2020-02-07 19:14:30 +01:00
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Changed status from 'Needs Triage' to: 'Needs Developer To Reproduce'

Changed status from 'Needs Triage' to: 'Needs Developer To Reproduce'
Vilem Duha commented 2020-02-08 10:51:30 +01:00
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After 2 days of testing, I can now assume I fixed this bug successfully (committed to 2.82 master). If you experience it again, please reopen.

After 2 days of testing, I can now assume I fixed this bug successfully (committed to 2.82 master). If you experience it again, please reopen.
Vilem Duha commented 2020-02-08 10:51:39 +01:00
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Changed status from 'Needs Developer To Reproduce' to: 'Resolved'

Changed status from 'Needs Developer To Reproduce' to: 'Resolved'
Vilem Duha self-assigned this 2020-02-08 10:51:39 +01:00
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