Regression: Vertex Weight Mix crash on apply/undo when mesh has shape keys #109523
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Reference: blender/blender#109523
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System Information
Operating system: Windows-10-10.0.19045-SP0 64 Bits
Graphics card: NVIDIA GeForce GTX 1070 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 531.41
Blender Version
Broken: version: 3.4.0 Alpha, branch: master, commit date: 2022-09-09 22:58, hash:
rB352d55b1c887
Worked: version: 3.4.0 Alpha, branch: master, commit date: 2022-09-09 00:25, hash:
rB81558783e403
Short description of error
I'm getting a crash in a community addon when it applies a Vertex Weight Mix modifier to a mesh with shape keys.
No crash occurs with the addon when running Blender with
--debug-memory
, instead a lot ofMemoryblock add_shapekey_layers: double free
andMemoryblock free: pointer not in memlist
are printed to the system console.I have been unable to reproduce the exact scenario present in the addon in isolation, whereby a crash occurs when applying the modifier, but does not crash when
--debug-memory
is used. However, I have managed to produce similar crashes with Vertex Weight Mix that I'm guessing are related.Exact steps for others to reproduce the error
Crash applying modifier (seems to always crash even with
--debug-memory
)Crash on undo unless
--debug-memory
is used:--debug-memory
, this also seems to make the mesh invisible unless the shape keys are removed--debug-memory
, otherwiseMemoryblock free: pointer not in memlist
is printed once to the System Console. Nothing is printed to the System console if not using--debug-memory
.Crash on entering Edit mode after applying modifier (sometimes doesn't crash with
--debug-memory
):--debug-memory
, this also seems to make the mesh invisible unless the shape keys are removedCan confirm in last 4.0 debug build from scratch
Assertion failed: alignment < 1024, file F:\Blender_build\first\blender\intern\guardedalloc\intern\mallocn_lockfree_impl.c, line 290
Vertex Weight Mix crash on apply/undo when mesh has shape keysto Regression: Vertex Weight Mix crash on apply/undo when mesh has shape keysPotentially caused by
21f2bacad9
@HooglyBoogly
Hmm, I see you've modified the report body to specify 3.4.0a broken and working versions, though I don't get a crash with any of the three sets of reproduction steps on Blender 3.3.8, 3.4.0, 3.4.1 or 3.5.1.
Yes, I have a folder of 300 blender versions from the last 5-6 years, and going through them, I found what was crashing for me. Not sure if there are any reasons why this result might be inaccurate.
@Mysteryem Here is my simplest example
Campbell Barton referenced this issue2024-10-11 06:00:44 +02:00