Regression: Crash on COW delete of shared custom data #109583
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Hans Goudey
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Reference: blender/blender#109583
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System Information
Operating system: Linux-5.4.0-153-generic-x86_64-with-glibc2.31 64 Bits, X11 UI
Graphics card: NVIDIA GeForce RTX 2070 SUPER/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 535.54.03
(Dualboot Windows:)
Operating system: Windows-10-10.0.19045-SP0 64 Bits
Graphics card: NVIDIA GeForce RTX 2070 SUPER/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 531.41
Blender Version
Broken: version: 3.6.0 Alpha, branch: main, commit date: 2023-04-15 01:59, hash:
b601ae87d064Worked: version: 3.6.0 Alpha, branch: main, commit date: 2023-04-12 22:05, hash:
d48939f103c0Short description of error
Blender crashes when I pose bones (Rotate, Grab, Scale) of the armature in the attached .blend file.
This is a project I created before Blender 3.6.
I deleted everything from it but the objects that seem to be involved in the crash.
BLI_assert failed: F:\Blender_build\first\blender\source\blender\blenlib\BLI_implicit_sharing.hh:136, remove_user_and_delete_if_last(), at 'old_user_count >= 1'Exact steps for others to reproduce the error
(Might need some tries)
Crash when posing armatureto Regression: Crash when posing armatureRegression: Crash when posing armatureto Regression: Crash on COW delete of shared custom dataI'll check
Potentially caused by:
7eee378eccor bybaf6892270Search problem: This is not a regression. Previously, this was a very long memory leak. But now it's a potential crash.
I will continue to revise this report to make the playback steps as simple as possible.
Wow, thank you for such quick response and investigation! :D <3
So far, I can see that this can be simplified down to an object with time dependent geometry and a bunch of attached hair objects. And also a lot of layers of custom data. But still can't reproduce from scratch. It seems that the problem is in the synchronization of the dependency graph.
Memory leak introduced between:
Broken: version: 3.5.0 Alpha, branch: master, commit date: 2023-01-13 23:22, hash:
rB3a3d9488a163Worked: version: 3.5.0 Alpha, branch: master, commit date: 2023-01-08 22:09, hash:
rBe7a554e551e4