Regression: GPU subdivision crash when switched to edit mode #98813
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Reference: blender/blender#98813
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System Information
Operating system: Windows-10-10.0.19043-SP0 64 Bits
Graphics card: Intel(R) UHD Graphics 620 Intel 4.5.0 - Build 27.20.100.9664
Blender Version
Broken: version: 3.2.0, branch: master, commit date: 2022-06-08 10:22, hash:
e05e1e3691Crash caused by
0609b4bb49Short description of error
Crash when switched to edit mode with cylinder subdivision modifier
Exact steps for others to reproduce the error
Cylinder.001Test File:
kobliha.blend
Added subscriber: @Blahoslav-Fajmon
#99911 was marked as duplicate of this issue
#99901 was marked as duplicate of this issue
#99645 was marked as duplicate of this issue
#99537 was marked as duplicate of this issue
#99538 was marked as duplicate of this issue
#99506 was marked as duplicate of this issue
#99227 was marked as duplicate of this issue
#99074 was marked as duplicate of this issue
#99012 was marked as duplicate of this issue
#99011 was marked as duplicate of this issue
#98964 was marked as duplicate of this issue
#98963 was marked as duplicate of this issue
#98872 was marked as duplicate of this issue
Added subscriber: @PratikPB2123
Changed status from 'Needs Triage' to: 'Confirmed'
Thanks for the report. I can repro crash locally in 3.2, 3.3.
Doesn't crash in 3.1 so definitely a regression.
Will do the
git bisectCrash - edit mode + subdivisionto Regression: GPU subdivision crash when switched to edit modeAdded subscriber: @kevindietrich
Crash seems to occur only when object data is shared with other.
In attached file, object's data is shared with GN tree of
Polevaobject. Removing that from node tree also solves the issuecc @kevindietrich
Added subscriber: @brecht
Crash caused by
0609b4bb49@brecht ^
The problem is that
Cylinder.001is being instanced by geometry nodes. Or rather, its evaluated mesh is being instanced, and the object used for rendering is thePoleva, notCylinder.001. Then in the draw manager it tries to find the subdivision modifier on thePolevaobject, but it's not there.This problem predates my fix, but would show the object without subdivision instead of crashing.
This issue was referenced by
a8c92331cbThis issue was referenced by
ca9d65cc97Added subscriber: @HooglyBoogly
Isn't the idea to cache the subdivision level and any other relevant information from the modifier when creating the subdivision surface wrapper mesh? In that case the drawing code shouldn't need to search for a modifier on the mesh, all the information should already be accessible.
The
Subdivstruct, containing the subdivision data structures from OpenSubdiv among other things is cached in the modifier. Maybe it could be moved to the mesh runtime without complicating the modifier code.I'm working on a fix...
Added subscriber: @GloombyBoy
Changed status from 'Confirmed' to: 'Resolved'
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