Crash from objects created via FBX from earlier blend files #43682

New Issue

Carlo Andreacchio · 2015-02-16T01:38:53+01:00

Carlo Andreacchio commented

2015-02-16 01:38:53 +01:00

System Information
Win 7 x64, gtx 580

Blender Version
Broken: 2.73 4ae6d58
Worked: 2.72 19cc516

Short description of error
FBX imports from earlier blend files crash newer blenders

Exact steps for others to reproduce the error

Open attached blend file
scroll out (this crashes mine usually, but sometimes doesn't)
If no crash happened... focus on the object 'tmp' and then try to enter edit mode

I can reproduce this consistently with different projects.
crash.blend

**System Information** Win 7 x64, gtx 580 **Blender Version** Broken: 2.73 4ae6d58 Worked: 2.72 19cc516 **Short description of error** FBX imports from earlier blend files crash newer blenders **Exact steps for others to reproduce the error** 1) Open attached blend file 2) scroll out (this crashes mine usually, but sometimes doesn't) 3) If no crash happened... focus on the object 'tmp' and then try to enter edit mode I can reproduce this consistently with different projects. [crash.blend](https://archive.blender.org/developer/F143609/crash.blend)

Carlo Andreacchio commented

2015-02-16 01:38:53 +01:00

Changed status to: 'Open'

Carlo Andreacchio commented

2015-02-16 01:38:53 +01:00

Added subscriber: @candreacchio

Bastien Montagne was assigned by Aaron Carlisle

2015-02-16 02:32:03 +01:00

Aaron Carlisle commented

2015-02-16 02:32:03 +01:00

Added subscriber: @Blendify

Carlo Andreacchio commented

2015-02-16 06:52:51 +01:00

I have isolated the problem down to material index of the polygon having a greater number than the allocated material slots to the mesh. Should not happen normally, but should not cause a crash.

Bastien Montagne commented

2015-02-16 08:51:22 +01:00

Changed status from 'Open' to: 'Archived'

Bastien Montagne closed this issue

2015-02-16 08:51:22 +01:00

Bastien Montagne commented

2015-02-16 08:51:22 +01:00

This is not really a bug, Blender is not expected to handle correctly corrupted meshes.

Bug was in importer not making check for such situation (well,real bug is in those broken FBX files, but…). This has been fixed some months ago.

Regarding your crashing object, there is a way to fix the situation: while it is still not visible in viewport, select it in outliner, open a python window ad type C.object.data.validate_material_indices(). Should return True, which means some errors were found and fixed.

This is not really a bug, Blender is not expected to handle correctly corrupted meshes. Bug was in importer not making check for such situation (well,real bug is in those broken FBX files, but…). This has been fixed some months ago. Regarding your crashing object, there is a way to fix the situation: while it is still not visible in viewport, select it in outliner, open a python window ad type `C.object.data.validate_material_indices()`. Should return True, which means some errors were found and fixed.

Carlo Andreacchio commented

2015-02-16 09:51:40 +01:00

Thanks mont29... we actually wrote our own python script which is a bit more complicated than yours, we will update it with your python command and use it on any files in the future that won't open.

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Crash from objects created via FBX from earlier blend files #43682