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Blender crashes on undo or redo
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System Information
Operating system: Windows-10-10.0.17134 64 Bits
Graphics card: AMD Radeon R7 Series ATI Technologies Inc. 4.5.13474 Core Profile Context

Blender Version
Broken: version: 2.80 (sub 75), branch: master, commit date: 2019-07-29 14:47, hash: rBf6cb5f54494e
Worked: (optional)

Short description of error
Very frequently blender will crash when I use undo or redo. Some times it will happen when using undo only once other time it will happen if I undo multiple times in a row fast or slow.
It happens in edit mode and I think only when I use the loop cut or edge slide tools.
I'm new to blender so there might be some unattached geometry or random vertexes that might affect the crush.

Exact steps for others to reproduce the error
In edit mode use loop cut or edge slide tools.
Press ctrl+Z or ctrl+shift+Z. Sometimes it has to be done multiple times in a row and fast, other time one undo or redo is enuff.
Get frustrated because you did not save your progress.

The file I'm working on:



Related Objects

Event Timeline

dip soup (buhmand) updated the task description. (Show Details)
Campbell Barton (campbellbarton) triaged this task as Needs Information from User priority.

Please test in daily build.

I have used the 2.81.0-git.0d719fcacb3b-windows64 build for a bit and no crashes so far.