Crash when opening a blend file that links a collection which also links a collection #85289

New Issue

Paul Golter · 2021-02-01T18:25:14+01:00

Paul Golter commented

2021-02-01 18:25:14 +01:00

System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: GeForce RTX 2070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 456.71

Blender Version
Broken: version: 2.91.2, branch: master, commit date: 2021-01-19 16:15, hash: 5be9ef4177
Worked: (newest version of Blender that worked as expected)

Short description of error
Blender crashes when opening a blend file that links a collection which also links a collection.

Exact steps for others to reproduce the error
In the appendix you find 3 blend files:

tree.blend
beach.blend
shot.blend
The external pathes are all relative and should be openable without a problem, as long as all 3 blend files are in the same folder.

Try opening tree.blend. It contains just a collection called "tree" with some simple geo in it.
Try opening beach.blend. It contains a collection called "beach". In this collection there is the "tree" collection linked in from tree.blend + beach_geo object.
Try opening shot.blend. It should contain a collection called "shot". In this collection there is the "beach" collection linked in from the beach.blend file. It crashes when trying to open it.

To reproduce this behavior with new blend files:
I will use some placeholder names for easier reading:

Create tree.blend file > create collection "tree" > add geo in "tree" collection.
Create beach.blend file > create collection "beach" > link in "tree" collection from tree.blend (It does not matter if you turn off "instance collections" or "instance object data" but in the provided blend files i turned this settings off)
Create shot.blend file > create collection "shot" > link "beach" collection from beach.blend
Save shot.blend file
Close Blender
Open Blender
Open shot.blend > crash

Side note: Blender also crashes when you have a new empty blend file and try to link the "shot" collection from shot.blend.

tree.blend
shot.blend
beach.blend

**System Information** Operating system: Windows-10-10.0.19041-SP0 64 Bits Graphics card: GeForce RTX 2070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 456.71 **Blender Version** Broken: version: 2.91.2, branch: master, commit date: 2021-01-19 16:15, hash: `5be9ef4177` Worked: (newest version of Blender that worked as expected) **Short description of error** Blender crashes when opening a blend file that links a collection which also links a collection. **Exact steps for others to reproduce the error** In the appendix you find 3 blend files: - tree.blend - beach.blend - shot.blend - >The external pathes are all relative and should be openable without a problem, as long as all 3 blend files are in the same folder. 1. Try opening tree.blend. It contains just a collection called "tree" with some simple geo in it. 2. Try opening beach.blend. It contains a collection called "beach". In this collection there is the "tree" collection linked in from tree.blend + beach_geo object. 3. Try opening shot.blend. It should contain a collection called "shot". In this collection there is the "beach" collection linked in from the beach.blend file. It crashes when trying to open it. To reproduce this behavior with new blend files: I will use some placeholder names for easier reading: 1. Create tree.blend file > create collection "tree" > add geo in "tree" collection. 2. Create beach.blend file > create collection "beach" > link in "tree" collection from tree.blend (It does not matter if you turn off "instance collections" or "instance object data" but in the provided blend files i turned this settings off) 3. Create shot.blend file > create collection "shot" > link "beach" collection from beach.blend 4. Save shot.blend file 5. Close Blender 6. Open Blender 7. Open shot.blend > crash Side note: Blender also crashes when you have a new empty blend file and try to link the "shot" collection from shot.blend. [tree.blend](https://archive.blender.org/developer/F9607948/tree.blend) [shot.blend](https://archive.blender.org/developer/F9607947/shot.blend) [beach.blend](https://archive.blender.org/developer/F9607946/beach.blend)

Paul Golter commented

2021-02-01 18:25:14 +01:00

Added subscriber: @pullpullson

Riccardo Giovanetti commented

2021-02-01 21:39:38 +01:00

Added subscriber: @Harvester

Riccardo Giovanetti commented

2021-02-01 21:39:38 +01:00

Here on

Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: GeForce GTX 1070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 461.40

Blender Version: 2.91.2, branch: master, commit date: 2021-01-19 16:15, hash: 5be9ef4177

after a little bit of testing, the issue seems located in the beach collection when linked into another file, even a fresh new one. Simulating such a simple scenario with new files, a cube and a plane, the nested linking appears to work, even when linking in the tree collection. The beach collection, instead, can be linked, but saving and reopening the new shot file let's Blender crash. You might try to rebuild that collection/set in a new file, and link that new one inside your shot file.

Here on Operating system: Windows-10-10.0.18362-SP0 64 Bits Graphics card: GeForce GTX 1070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 461.40 Blender Version: 2.91.2, branch: master, commit date: 2021-01-19 16:15, hash: `5be9ef4177` after a little bit of testing, the issue seems located in the beach collection when linked into another file, even a fresh new one. Simulating such a simple scenario with new files, a cube and a plane, the nested linking appears to work, even when linking in the tree collection. The beach collection, instead, can be linked, but saving and reopening the new shot file let's Blender crash. You might try to rebuild that collection/set in a new file, and link that new one inside your shot file.

Paul Golter commented

2021-02-02 09:44:02 +01:00

Hey Ricardo,

thanks for your answer. I tested the same thing again with just a cube and a plane and I get the same result:
I made a quick screen record to show you my exact process to create the crash. You find it in the appendix.

What is interesting:

Without closing the instance of blender the shot_02 file can be opened
Quiting Blender and then trying to open shot_02 leads to a crash

I also supplied another 3 blend files:

stone.blend
forest.blend
shot_02.blend

2021-02-02_09-34-26_blender_link_bug.mp4

forest.blend

stone.blend

shot_02.blend

Hey Ricardo, thanks for your answer. I tested the same thing again with just a cube and a plane and I get the same result: I made a quick screen record to show you my exact process to create the crash. You find it in the appendix. What is interesting: - Without closing the instance of blender the shot_02 file can be opened - Quiting Blender and then trying to open shot_02 leads to a crash I also supplied another 3 blend files: - stone.blend - forest.blend - shot_02.blend [2021-02-02_09-34-26_blender_link_bug.mp4](https://archive.blender.org/developer/F9608781/2021-02-02_09-34-26_blender_link_bug.mp4) [forest.blend](https://archive.blender.org/developer/F9608790/forest.blend) [stone.blend](https://archive.blender.org/developer/F9608789/stone.blend) [shot_02.blend](https://archive.blender.org/developer/F9608788/shot_02.blend)

Paul Golter commented

2021-02-02 10:06:30 +01:00

I found another strange behavior:

When trying to open shot_02.blend blender crashes.
But when I do the following BEFORE opening shot_02.blend I can open it:

open stone.blend
save stone.blend
open shot_02.blend without quitting blender

When I then close blender and open again and try to load shot_02.blend I get a crash again.

2021-02-02_09-59-56_save_and_open.mp4

I found another strange behavior: When trying to open shot_02.blend blender crashes. But when I do the following BEFORE opening shot_02.blend I can open it: - open stone.blend - save stone.blend - open shot_02.blend without quitting blender When I then close blender and open again and try to load shot_02.blend I get a crash again. [2021-02-02_09-59-56_save_and_open.mp4](https://archive.blender.org/developer/F9608810/2021-02-02_09-59-56_save_and_open.mp4)

Riccardo Giovanetti commented

2021-02-02 17:04:56 +01:00

Hi Paul, I simply verified that your issue was replicable with and without your sample files. At this point it's better to leave this into the good hands of the developers for further investigations.

Paul Golter commented

2021-02-02 17:15:44 +01:00

Hey Riccardo,

thanks for verifying and for handing it over to the developers! :)

Hey Riccardo, thanks for verifying and for handing it over to the developers! :)

Germano Cavalcante commented

2021-02-03 16:21:57 +01:00

Added subscriber: @mano-wii

Germano Cavalcante commented

2021-02-03 16:21:57 +01:00

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

Germano Cavalcante commented

2021-02-03 16:21:57 +01:00

In #85289#1105421, @Harvester wrote:
(...)
after a little bit of testing, the issue seems located in the beach collection when linked into another file, even a fresh new one. Simulating such a simple scenario with new files, a cube and a plane, the nested linking appears to work, even when linking in the tree collection. The beach collection, instead, can be linked, but saving and reopening the new shot file let's Blender crash. You might try to rebuild that collection/set in a new file, and link that new one inside your shot file.

This makes me suspect that the file is not simplified enough to be suitable for a bug report.
Due to the number of reports, we try to avoid confirming reports whose scenario is too time consuming for the developers to track down, we require the bug reporter to narrow down the problem.
It may be more convenient to create another report describing only the essential steps to reproduce the bug.

> In #85289#1105421, @Harvester wrote: > (...) > after a little bit of testing, the issue seems located in the beach collection when linked into another file, even a fresh new one. Simulating such a simple scenario with new files, a cube and a plane, the nested linking appears to work, even when linking in the tree collection. The beach collection, instead, can be linked, but saving and reopening the new shot file let's Blender crash. You might try to rebuild that collection/set in a new file, and link that new one inside your shot file. This makes me suspect that the file is not simplified enough to be suitable for a bug report. Due to the number of reports, we try to avoid confirming reports whose scenario is too time consuming for the developers to track down, we require the bug reporter to narrow down the problem. It may be more convenient to create another report describing only the essential steps to reproduce the bug.

Philipp Oeser commented

2021-02-19 17:25:43 +01:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2021-02-19 17:25:43 +01:00

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

Philipp Oeser commented

2021-02-19 17:25:43 +01:00

I can confirm a crash.

There seems to be a fix in blender-2.93.0-4604350eefab from todays buildbot https://builder.blender.org/download/
blender-2.92.0rc-linux64 still crashes though.

Will try to see what fixed this (and if that commit can still go into 2.92)

I can confirm a crash. There seems to be a fix in `blender-2.93.0-4604350eefab` from todays buildbot https://builder.blender.org/download/ `blender-2.92.0rc-linux64` still crashes though. Will try to see what fixed this (and if that commit can still go into 2.92)

Philipp Oeser commented

2021-02-19 17:44:22 +01:00

Apparently this was fixed by 302625eb37 in 2.93

Apparently this was fixed by 302625eb37 in 2.93

Paul Golter commented

2021-02-20 10:38:57 +01:00

Hey Philip, thanks for confirming! Good to see that there is a fix for this in 2.93. I will test it next week. Would be great to have a patch in 2.92 for this. I think 2.91 also has this issue.

Paul Golter commented

2021-02-20 10:56:19 +01:00

I can confirm.
While I can't open the shot.blend file I supplied in this report with:

2.92.0 Release Candidate, branch: master, commit date: 2021-02-19 18:02, hash: b1142858d4
2.91.2, branch: master, commit date: 2021-01-19 16:15, hash: 5be9ef4177

with 2.93.0 Alpha, branch: master, commit date: 2021-02-20 05:19, hash: 37e6a1995a it works without a problem.

I can confirm. While I can't open the `shot.blend` file I supplied in this report with: - 2.92.0 Release Candidate, branch: master, commit date: 2021-02-19 18:02, hash: `b1142858d4` - 2.91.2, branch: master, commit date: 2021-01-19 16:15, hash: `5be9ef4177` with 2.93.0 Alpha, branch: master, commit date: 2021-02-20 05:19, hash: `37e6a1995a` it works without a problem.

Philipp Oeser commented

2021-02-22 14:14:17 +01:00

Changed status from 'Confirmed' to: 'Resolved'

Philipp Oeser closed this issue

2021-02-22 14:14:17 +01:00

Philipp Oeser self-assigned this 2021-02-22 14:14:17 +01:00

Philipp Oeser commented

2021-02-22 14:14:17 +01:00

Added subscriber: @mont29

Philipp Oeser commented

2021-02-22 14:14:17 +01:00

So, since this is fixed in 2.93, I will close this.

Fix will not be in 2.92 though, see comment in 302625eb37:

In 302625eb37#295844, @mont29 wrote:
Uuuuh... That's way too late for 2.92 am afraid.

Decided not to backport it when I committed it because it already looked too dangerous to me at that point, actually.

So, since this is fixed in 2.93, I will close this. Fix will not be in 2.92 though, see comment in 302625eb37: > In 302625eb37#295844, @mont29 wrote: > Uuuuh... That's way too late for 2.92 am afraid. > > Decided not to backport it when I committed it because it already looked too dangerous to me at that point, actually.

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Crash when opening a blend file that links a collection which also links a collection #85289