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Maniphest T90489

Multiple crashes when working in Edit Face mode
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Description

System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: GeForce GTX 1660 SUPER/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 457.51

Blender Version
Broken: version: 3.0.0 Alpha, branch: master, commit date: 2021-08-06 02:10, hash: rB99738fbfdc8b
Worked: (newest version of Blender that worked as expected)

Short description of error
When trying to cut away polygons with delete, crash.
When trying to recalculate Normals on Faces in Alt-N menu selection, crash.
I was able to duplicate out some Faces from area I needed to trim up, then separated and no crash occurred, but crashed again when trying to reset/recalculte normals.

Very simple part, 4 rectangles, flat, I had cut a smaller rectangle out of their centers as they were too big. Nothing difficult. This was happening a few days ago. I am going to revert back to Aug 4th for now, will wait for Alpha for Aug 7th or 8th.

Exact steps for others to reproduce the error
4 long strip polygons. Cut them with knife to shorten them. Use Ring tool to cut a dual line through them longitudinally. You have now created thin inner rectangles in the core of the strips. Try to delete the outer rectangles from them, leaving the inner cores. Blender should then crash. Also if you try to recalculate the faces (Alt-N/Recalculate Normals) of left-overs after the cut (as they get odd shadows on them), then it should also crash.

[Based on the default startup or an attached .blend file (as simple as possible)]

Related Objects

Event Timeline

Bill Ortis (lionheart001) created this task.Aug 7 2021, 12:19 AM
M (Snudl) added a subscriber: M (Snudl).Aug 7 2021, 6:57 AM

I think I'm running into the same issue. I'll attach a small test file and some crash logs, which are from the newest Cycles-X daily build, hash 499008939a48 (Merge branch 'master' into cycles-x).
It crashes not only with face specific operations, but also when trying to dissolve a vertex or edge, or connect vertices with J.

edit crash.blend763 KBDownload

edit crash 1.crash.txt1 KBDownload

edit crash 2.crash.txt1 KBDownload

Pratik Borhade (PratikPB2123) added a subscriber: Pratik Borhade (PratikPB2123).EditedAug 7 2021, 1:24 PM

Can reproduce crash with the file provided by @M (Snudl).

Recent regression it seems. Will bisect to find the culprit.

(Though unsure about the steps to recreate the crash from scratch which Bill has mentioned but will confirm for now since the crash does not happen with little old builds)

Pratik Borhade (PratikPB2123) added a comment.EditedAug 7 2021, 4:03 PM

All crashes caused by {647a8bff06bfabeafa01333d4b9d8d8b8ae1c569}

May be I should report each of them separately.

Pratik Borhade (PratikPB2123) added a comment.Aug 9 2021, 3:54 AM

Could not reproduce the crash with debug build. @M (Snudl), @Bill Ortis (lionheart001) can you please mention the exact steps to reproduce the mesh.

I could not reproduce this from scratch with present described steps.

(I fear to confirm the report in present state. May be other triagers, developers will check the issue to confirm it)

Campbell Barton (campbellbarton) closed this task as Archived.EditedAug 9 2021, 4:50 AM
Campbell Barton (campbellbarton) added a subscriber: Campbell Barton (campbellbarton).

Closing, since this report is too vague includes multiple reports in one, also, it seems likely these issues are a duplicate of T90256 which has been resolved.

Please test a recent build of the master branch, if you are still running into these problems open a new reports with the exact steps to redo the bug.

M (Snudl) added a comment.Aug 9 2021, 7:16 AM

Sorry if I complicated the issue, though it would have been nice to have some time to respond here. Anyway, since I can still reproduce this on master, here's my new report: https://developer.blender.org/T90532

Pratik Borhade (PratikPB2123) mentioned this in T90532: Seg fault crash with various edit functions.Aug 9 2021, 7:58 AM