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Maniphest T65302

Blender 2.8 - EDIT Mode - Crashing after selecting one of multiple materials
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Description

System Information
Operating system: Windows 7 Ultimate x64
Graphics card: nVidia GeForce GTX1060 6GB

Blender Version
Broken: 2.80, fee600f47980, master, 2019-05-30 18:17, as found on the splash screen)
Worked: (optional)

Short description of error
Blender crashing in EDIT mode when selecting one of the multiple materials assigned to object.

Exact steps for others to reproduce the error

  1. Select default cube, add multiple simple materials
  2. Go to EDIT mode
  3. Select some face(s) and click some of the listed material, it crash immediately

Revisions and Commits

rB Blender
rB9899999e944c Fix crash on certain changes in edit mode

Related Objects

Event Timeline

Petr Smrtka (Kmochy) created this task.May 30 2019, 12:17 PM
Tom Wilson (hedgehog90) added a subscriber: Tom Wilson (hedgehog90).EditedMay 30 2019, 12:26 PM

I have this too.

Error   : EXCEPTION_ACCESS_VIOLATION

Possibly related? : T65285

Dino Pephanis (Ndinhos) added a subscriber: Dino Pephanis (Ndinhos).May 30 2019, 5:33 PM

I'm getting this too: Mac OS X 10.14.5

Marcin Twarowski (Tvaroog) added a subscriber: Marcin Twarowski (Tvaroog).May 31 2019, 8:56 AM

I can confirm on Win 10, GTX1080. There's also other problem, when some times I can't deselect faces. Here's a test file:

materials_bug.blend103 KBDownload

Marcin Twarowski (Tvaroog) mentioned this in T65346: Blender crashes when selecting material in editing mode and LookDev view.May 31 2019, 12:54 PM
Leha (leha) mentioned this in T65344: Blender crashes in edit mode when changing object .May 31 2019, 1:25 PM
Tom Wilson (hedgehog90) added a comment.May 31 2019, 2:41 PM

Debugging from source shows that the problem lies with mesh_batch_cache_valid(Mesh * me) in draw\intern\draw_cache_impl_mesh.c, Line 2079:

if (cache->is_editmode != (me->edit_mesh != NULL)) {
Sergey Sharybin (sergey) changed the task status from Unknown Status to Resolved by committing rB9899999e944c: Fix crash on certain changes in edit mode.May 31 2019, 5:06 PM
Sergey Sharybin (sergey) added a commit: rB9899999e944c: Fix crash on certain changes in edit mode.
Peter Berglund (Pet) added a subscriber: Peter Berglund (Pet).Jul 23 2019, 9:43 AM

This still happens for me in 2.8 RC2.

Windows 10.0.17763
GeForce GTX 1080
NVidia Studio Driver 430.86

Stephen Hamacek (hammers) added a subscriber: Stephen Hamacek (hammers).Oct 7 2019, 9:13 AM
This comment was removed by Stephen Hamacek (hammers).