Crash when entering edit mode with a lot of meshes selected #71015

New Issue

Francois Rimasson · 2019-10-22T10:49:12+02:00

Francois Rimasson commented

2019-10-22 10:49:12 +02:00

System Information
Operating system: windows 7
Graphics card: GTX 1660

Blender Version latest 2.81 and 2.852

I select multiple meshes in the attached porte13.blend file and enter edit mode : crash in most cases

This crash dosen't happen with Blender 2.80

porte_v13.zip

**System Information** Operating system: windows 7 Graphics card: GTX 1660 **Blender Version** latest 2.81 and 2.852 I select multiple meshes in the attached porte13.blend file and enter edit mode : crash in most cases This crash dosen't happen with Blender 2.80 [porte_v13.zip](https://archive.blender.org/developer/F7847155/porte_v13.zip)

Francois Rimasson commented

2019-10-22 10:49:12 +02:00

Added subscriber: @FrancoisRimasson

Philipp Oeser commented

2019-10-22 14:00:09 +02:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2019-10-22 14:00:09 +02:00

Can confirm.

getting this on open

ERROR (bke.modifier): /blender/source/blender/blenkernel/intern/modifier.c:410 modifier_setError: Enable 'Auto Smooth' option in mesh settings

getting this on entering editmode

BLI_assert failed: /blender/source/blender/gpu/intern/gpu_element.c:197, GPU_indexbuf_set_tri_verts(), at '(elem + 1) * 3 <= builder->max_index_len'

checking...

Can confirm. getting this on open ``` ERROR (bke.modifier): /blender/source/blender/blenkernel/intern/modifier.c:410 modifier_setError: Enable 'Auto Smooth' option in mesh settings ``` getting this on entering editmode ``` BLI_assert failed: /blender/source/blender/gpu/intern/gpu_element.c:197, GPU_indexbuf_set_tri_verts(), at '(elem + 1) * 3 <= builder->max_index_len' ``` checking...

Philipp Oeser commented

2019-10-22 14:44:30 +02:00

There is something wrong with the material indices of some meshes.

You can run this script to correct this:

import bpy
for ob in bpy.data.objects:
    if ob.data is None or ob.type != 'MESH':
        continue
    not_valid = ob.data.validate_material_indices()
    if not_valid:
        print("mat indices not_valid ", ob.name)
    else:
        print("mat indices valid ", ob.name)

output will be [just the bad ones]:

mat indices valid  screw_Plate_01.000
mat indices not_valid  screw_Plate_01.001
mat indices not_valid  screw_Plate_01.003
mat indices not_valid  screw_Plate_01.005
mat indices not_valid  screw_Plate_01.008
mat indices not_valid  screw_Plate_01.009
mat indices valid  screw_Plate_01.012
mat indices not_valid  screw_Plate_01.013
mat indices not_valid  screw_Plate_01.014
mat indices not_valid  screw_Plate_01.015

Now the question is: how did we get here?
This might be because of a recent bug blender had about multiple materials...
(if this is the case then you should run that script and you should not any errors/crashes anymore)

If these errors show up again after you have cleaned the file, we would need to know which operations caused this to happen? Any idea?

There is something wrong with the material indices of some meshes. You can run this script to correct this: ``` import bpy for ob in bpy.data.objects: if ob.data is None or ob.type != 'MESH': continue not_valid = ob.data.validate_material_indices() if not_valid: print("mat indices not_valid ", ob.name) else: print("mat indices valid ", ob.name) ``` output will be [just the bad ones]: ``` mat indices valid screw_Plate_01.000 mat indices not_valid screw_Plate_01.001 mat indices not_valid screw_Plate_01.003 mat indices not_valid screw_Plate_01.005 mat indices not_valid screw_Plate_01.008 mat indices not_valid screw_Plate_01.009 mat indices valid screw_Plate_01.012 mat indices not_valid screw_Plate_01.013 mat indices not_valid screw_Plate_01.014 mat indices not_valid screw_Plate_01.015 ``` Now the question is: how did we get here? This might be because of a recent bug blender had about multiple materials... (if this is the case then you should run that script and you should not any errors/crashes anymore) If these errors show up **again** after you have cleaned the file, we would need to know which operations caused this to happen? Any idea?

blender-admin commented

2019-11-06 16:06:57 +01:00

This issue was referenced by 65b414cfb2

This issue was referenced by 65b414cfb291e8ae47e92ab1b101de3fa6d19704

Brecht Van Lommel commented

2019-11-06 16:10:41 +01:00

Changed status from 'Open' to: 'Resolved'

Brecht Van Lommel closed this issue

2019-11-06 16:10:41 +01:00

Brecht Van Lommel self-assigned this 2019-11-06 16:10:41 +01:00

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Crash when entering edit mode with a lot of meshes selected #71015