Example file in 2.83 manual crashes blender versions newer than 2.79 #75389

New Issue

shannon zachow · 2020-04-04T21:47:33+02:00

shannon zachow commented

2020-04-04 21:47:33 +02:00

System Information
Operating system: linux
Graphics card: GTX 1050

Blender Version
Broken: 2.81a, 2.82a, 2.83 (7c0e285948, 2020apr03)
Worked: 2.79b

Short description of error
Blender crashes with Segmentation Fault when trying to open file [Cloth-flag2.blend ]] referenced in [ https:*docs.blender.org/manual/en/dev/physics/cloth/examples.html | 2.83 manual page .

Exact steps for others to reproduce the error

Download the file.
Start blender with that file from cmd-line.

Segmentation fault.

**System Information** Operating system: linux Graphics card: GTX 1050 **Blender Version** Broken: 2.81a, 2.82a, 2.83 (7c0e28594840, 2020apr03) Worked: 2.79b **Short description of error** Blender crashes with Segmentation Fault when trying to open file [Cloth-flag2.blend ]] referenced in [[ https:*docs.blender.org/manual/en/dev/physics/cloth/examples.html | 2.83 manual page ](https:*wiki.blender.org/w/images/f/f9/Cloth-flag2.blend). **Exact steps for others to reproduce the error** - Download the file. - Start blender with that file from cmd-line. # Segmentation fault.

shannon zachow commented

2020-04-04 21:47:33 +02:00

Added subscriber: @shannonz-1

Evan Wilson commented

2020-04-05 01:45:46 +02:00

Added subscriber: @EAW

Evan Wilson commented

2020-04-05 01:45:46 +02:00

It doesn't crash for me using 2.82a or 2.83.11.
The file was made using Blender version 2.45.17. There is an f-curve for the Empty that has no RNA Path. ObIpo.001 shows up under UNKNOWN in Orphan Data. The file should be updated I think so that this is no longer broken. I am not sure if this responsibility falls to the documentation team or the physics module.

The debug_output says:

read file C:\Users\Evan\Desktop\bugs\#75389 Manual file crash 2.8X\Cloth-flag2.blend

Version 245 sub 17 date unknown hash

INFO: Converting to Animato...
	converting ob Camera
	converting ob Cylinder
	converting ob Empty
act_to_adt - set adt action to act
ipo to animdata - ID:Empty, IPO:ObIpo.001, actname:<None> constname:<None> seqname:<None>  curves:1
ipo_to_animato
ERROR (bke.lib_id): C:\blender-git\blender\source\blender\blenkernel\intern\lib_id.c:322 id_us_min: ID user decrement error: IPObIpo.001 (from '[Main]'): 0 <= 0
	has anim
	converting ob Lamp
	converting ob Plane
	converting material Material
	converting material Material.001
	converting world World
	converting camera Camera
	converting light Spot
	converting action ObAction
	converting ipo ObIpo.001
INFO: Animato convert done
Proportional size (0.000000) under 0.00001, resetting to 1!
Saved session recovery to 'C:\Users\Evan\AppData\Local\Temp\quit.blend'
Freed 0 (Unconverted) Ipo-Curves from IPO 'ObIpo.001'```

[blender_debug_output.txt](https://archive.blender.org/developer/F8449354/blender_debug_output.txt)

---
**System Information**
Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: GeForce GTX 470/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 376.51

**Blender Version**
version: 2.83 (sub 11), branch: master, commit date: 2020-04-04 16:55, hash: `505a19ed75`

It doesn't crash for me using 2.82a or 2.83.11. The file was made using Blender version 2.45.17. There is an f-curve for the Empty that has no RNA Path. `ObIpo.001` shows up under `UNKNOWN` in Orphan Data. The file should be updated I think so that this is no longer broken. I am not sure if this responsibility falls to the documentation team or the physics module. The debug_output says: ```Read blend: C:\Users\Evan\Desktop\bugs\#75389 Manual file crash 2.8X\Cloth-flag2.blend read file C:\Users\Evan\Desktop\bugs\#75389 Manual file crash 2.8X\Cloth-flag2.blend ``` Version 245 sub 17 date unknown hash ``` INFO: Converting to Animato... converting ob Camera converting ob Cylinder converting ob Empty act_to_adt - set adt action to act ipo to animdata - ID:Empty, IPO:ObIpo.001, actname:<None> constname:<None> seqname:<None> curves:1 ipo_to_animato ERROR (bke.lib_id): C:\blender-git\blender\source\blender\blenkernel\intern\lib_id.c:322 id_us_min: ID user decrement error: IPObIpo.001 (from '[Main]'): 0 <= 0 has anim converting ob Lamp converting ob Plane converting material Material converting material Material.001 converting world World converting camera Camera converting light Spot converting action ObAction converting ipo ObIpo.001 INFO: Animato convert done Proportional size (0.000000) under 0.00001, resetting to 1! Saved session recovery to 'C:\Users\Evan\AppData\Local\Temp\quit.blend' Freed 0 (Unconverted) Ipo-Curves from IPO 'ObIpo.001'``` [blender_debug_output.txt](https://archive.blender.org/developer/F8449354/blender_debug_output.txt) --- **System Information** Operating system: Windows-10-10.0.18362-SP0 64 Bits Graphics card: GeForce GTX 470/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 376.51 **Blender Version** version: 2.83 (sub 11), branch: master, commit date: 2020-04-04 16:55, hash: `505a19ed75`

shannon zachow commented

2020-04-05 04:48:00 +02:00

Log files created by

$ blenderVersion --debug --factory-startup Cloth-flag2.blend > log.Version.txt

where 'blenderVersion' is a path to a blender executable.

Log files created by ``` $ blenderVersion --debug --factory-startup Cloth-flag2.blend > log.Version.txt ``` where 'blenderVersion' is a path to a blender executable. [log.279.txt](https://archive.blender.org/developer/F8449636/log.279.txt) [log.281.txt](https://archive.blender.org/developer/F8449637/log.281.txt) [log.282.txt](https://archive.blender.org/developer/F8449638/log.282.txt) [log.283.txt](https://archive.blender.org/developer/F8449639/log.283.txt) [system-info.279.txt](https://archive.blender.org/developer/F8449640/system-info.279.txt) [system-info.281.txt](https://archive.blender.org/developer/F8449641/system-info.281.txt) [system-info.282.txt](https://archive.blender.org/developer/F8449642/system-info.282.txt) [system-info.283.txt](https://archive.blender.org/developer/F8449643/system-info.283.txt)

Germano Cavalcante commented

2020-04-06 17:16:40 +02:00

Added subscribers: @mont29, @mano-wii

Germano Cavalcante commented

2020-04-06 17:16:40 +02:00

Changed status from 'Needs Triage' to: 'Confirmed'

Germano Cavalcante commented

2020-04-06 17:16:40 +02:00

I cannot reproduce this with either the latest stable or current development versions of Blender:

However, the message indicates that something is wrong.

ERROR (bke.lib_id): ...\source\blender\blenkernel\intern\lib_id.c:322 id_us_min: ID user decrement error: IPObIpo.001 (from '[Main]'): 0 <= 0

@mont29, do you know what may be happening?
(Probably the problem is in this old file. v2.45.17)

I cannot reproduce this with either the latest stable or current development versions of Blender: However, the message indicates that something is wrong. ``` ERROR (bke.lib_id): ...\source\blender\blenkernel\intern\lib_id.c:322 id_us_min: ID user decrement error: IPObIpo.001 (from '[Main]'): 0 <= 0 ``` @mont29, do you know what may be happening? (Probably the problem is in this old file. v2.45.17)

noki paike commented

2020-04-06 17:22:33 +02:00

Added subscriber: @nokipaike

noki paike commented

2020-04-06 17:22:33 +02:00

just to bring to your attention, activating the experimental new undo, blender with the old files crashes more or less immediately.

Bastien Montagne self-assigned this 2020-04-06 19:04:24 +02:00

Bastien Montagne commented

2020-04-06 19:04:24 +02:00

The assert is not really meaningful here... usercount of deprecated old IPO is not expected to be really valid, will tweak that I think.

Loading such old files in general is not really expected to work well, but it should not crash either. will check further later.

The assert is not really meaningful here... usercount of deprecated old IPO is not expected to be really valid, will tweak that I think. Loading such old files in general is not really expected to work well, but it should not crash either. will check further later.

Bastien Montagne commented

2020-04-09 11:22:33 +02:00

Changed status from 'Confirmed' to: 'Needs User Info'

Bastien Montagne commented

2020-04-09 11:22:33 +02:00

Cannot reproduce any crash here either... Silenced the assert for that deprecated ID type, for the rest please reconfirm that it still crashes for you with latest master?

Bastien Montagne commented

2020-04-16 17:37:56 +02:00

Changed status from 'Needs User Info' to: 'Resolved'

Bastien Montagne closed this issue

2020-04-16 17:37:56 +02:00

Bastien Montagne commented

2020-04-16 17:37:56 +02:00

More than a week without feedback, considering the issue as solved for now.

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Example file in 2.83 manual crashes blender versions newer than 2.79 #75389

Segmentation fault.