Blender crashes suddenly when add-on is invoked second time in the application #97516
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Reference: blender/blender#97516
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System Information
Operating system: Windows-10-10.0.19044-SP0 64 Bits
Graphics card: NVIDIA GeForce RTX 2080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 512.15
Blender Version
Broken: version: 3.1.0, branch: master, commit date: 2022-03-08 18:16, hash:
c77597cd0eWorked: (newest version of Blender that worked as expected)
Short description of error
Blender works fine for at the beginning when using Addon initially and then after some regular operations it suddenly crashes when I invoke the same addon that I used previously
Exact steps for others to reproduce the error
7184_autosave.blend
blender.crash.txt
blender_01.crash.txt
[Based on the default startup or an attached .blend file (as simple as possible)]
Added subscriber: @Akhilblender
Added subscriber: @rjg
Changed status from 'Needs Triage' to: 'Needs User Info'
What specific add-on and shortcut were you using? Have you tested that this issue still exists in Blender 3.1.2?
I tested it with Blender 3.1.2 too. Same crash occurs when I try to use add-ons. I tried using Meshmachine, Hardops, Boxcutter, etc. First time operation with addons work perfectly fine. It's the second time, I try to use addon it crashes after few operations. I use shortcuts Y for Meshmachine, Alt+W for Boxcutter, Q for Hardops. I tried changing keyboard shortcuts but problem still persists.
@Akhilblender Is this also reproducible with any add-on that is either already shipped with Blender or available free of charge? Unfortunately, we cannot purchase third-party add-ons trying to reproduce the bug.
This doesn't happen with add-ons shipped with blender. It happens to the add-ons that are developed by some independent developers either (paid or free) and I download them to use it in blender. I install them by directing blender to the zip folder containing the add-ons
@Akhilblender There is nothing inherently different about add-on shipped with Blender and those installed from third-parties, both use the same Python API. So there is no reason why the issue should only appear when using third-party add-ons. However, it may be related to the way particular functions are called by the add-on you have listed, but we need either a free add-on or one that is shipped with Blender, that allows to reproduce the crash.
Added subscriber: @Bintazmin
I'm no dev, but I'm having the same issue. Crash only seems to happen with me when I use MeshMachine 0.11.0, or 0.11.1.
The first operation or two seems to work fine, then when I attempt another... boom.
I reached out to the dev, and submitted all the crash info, but he couldn't reproduce.
Added subscriber: @MACHIN3
@MACHIN3 It seems like we need your input. At the moment it is unclear whether this is caused by a bug in Blender or if the add-ons use the Python API in an unsafe way.
If I can help you guys in any way, just let me know what you need.
I had the crash with all the addons that I added in blender. I tried a temporary workaround by creating a folder and adding all the third-party plugins in there and defining the location in Edit>Preferences>File Paths>Scripts>(Folder containing third-party addons). This seems to have been working fine for now. But I don't know if it is the right way to fix the issue
This doesn't seem to be related to my addons in any way. But I'd encourage Nick to try Akhil's solution.
@Akhilblender If you had this issue with all add-ons, then perhaps you can provide an example that is freely available so we can try to reproduce it? It's great that this workaround avoids the issue for you, but that should not be necessary.
@MACHIN3 Seems like it. Thank you for having a look though.
I tried Akhil's suggestion. Meshmachine worked fine for 3 operations, then Blender crashed again.
@Akhilblender @Bintazmin Please check if this issue occurs with one of Blender's add-ons that are included by default. If you cannot provide steps to reproduce this issue, then the ticket will eventually be closed.
Meshmachine 0.11.2 was released over the weekend. This update has solved the issue in my case.
@rjg . I tried the blender default add-ons and they work fine without any crashes
Removed subscriber: @MACHIN3
Changed status from 'Needs User Info' to: 'Archived'
While there may be a real issue in Blender, it has been more than a week without enough information to reproduce this issue.
Thanks again for the report. If the problem persists please open a new report with the required information.