Blender 3.0 crashes using load/save with python. #93950

New Issue

Bay Raitt · 2021-12-10T21:56:04+01:00

Bay Raitt commented

2021-12-10 21:56:04 +01:00

System Information
Windows 10
GTX 970

Blender Version
Broken: 3.0
Worked: 2.93

Short description of error
using python, loading a template.blend file and saving as a new.blend file will crash blender if a camera is present in the template.blend file.

Exact steps for others to reproduce the error
This crash broke my 2.93 comic toolkit addon. I had to write an addon to reproduce the crash. The addon below will load a template file with just a camera in it and then try to save it to a new file. Blender will crash on save. It has something to do with just the presence of a camera in the loaded template scene.

it's not the camera itself (I've rebuilt the camera from scratch) any camera in the loaded scene will cause the assert.

scratching my head. I included a blank new scene (no camera) that works just fine. to toggle between them just comment/uncomment the crashme.blend and crashmenot.blend lines (or add a camera to a blank scene as save over the crashme.blend)

such an odd bug. If I can figure out why this would crash blender 3.0 I can release my addon.

I'm curious why the presence of a new camera in the template scene causes the crash....

crashme.zip

**System Information** Windows 10 GTX 970 **Blender Version** Broken: 3.0 Worked: 2.93 **Short description of error** using python, loading a template.blend file and saving as a new.blend file will crash blender if a camera is present in the template.blend file. **Exact steps for others to reproduce the error** This crash broke my 2.93 comic toolkit addon. I had to write an addon to reproduce the crash. The addon below will load a template file with just a camera in it and then try to save it to a new file. Blender will crash on save. It has something to do with just the presence of a camera in the loaded template scene. it's not the camera itself (I've rebuilt the camera from scratch) any camera in the loaded scene will cause the assert. scratching my head. I included a blank new scene (no camera) that works just fine. to toggle between them just comment/uncomment the crashme.blend and crashmenot.blend lines (or add a camera to a blank scene as save over the crashme.blend) such an odd bug. If I can figure out why this would crash blender 3.0 I can release my addon. ![image.png](https://archive.blender.org/developer/F12728281/image.png) I'm curious why the presence of a new camera in the template scene causes the crash.... [crashme.zip](https://archive.blender.org/developer/F12728285/crashme.zip)

Bay Raitt commented

2021-12-10 21:56:04 +01:00

Added subscriber: @spiraloid-3

Bay Raitt changed title from ~~Blener crash using load/save with python.~~ to Blender 3.0 crashes using load/save with python.

2021-12-10 21:56:24 +01:00

Richard Antalik commented

2021-12-10 22:03:20 +01:00

Added subscriber: @iss

Richard Antalik commented

2021-12-10 22:03:20 +01:00

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

Richard Antalik commented

2021-12-10 22:03:20 +01:00

Can you provide exact steps to reproduce the issue?

Raimund Klink commented

2021-12-11 10:58:31 +01:00

Added subscriber: @Raimund58

Fen commented

2021-12-11 16:35:38 +01:00

Added subscriber: @chemicalcrux

Fen commented

2021-12-11 16:35:38 +01:00

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

Fen commented

2021-12-11 16:35:38 +01:00

I can reproduce this crash on both the current 3.0 release, as well as on a 3.1 alpha build.

I couldn't use the files to test in 2.93; it complains about an unsupported format. However, if I save the default camera+cube scene over crashme.blend and then run the operator, 2.93 does not crash.

Exact steps:

Install the crashme.zip add-on and enable it
Create C:\Documents, if that folder doesn't already exist (the script errors out otherwise)
Run the "Crash me" operator from the F3 menu
Crash

It triggers an access violation in the release build. In the debug build, it produces the following ASan output:

ERROR: AddressSanitizer: global-buffer-overflow on address 0x0000000000d0 at pc 0x7ff745d20b6f bp 0x001a80ffba00 sp 0x001a80ffba08
READ of size 8 at 0x0000000000d0 thread T0
    #0 0x7ff745d20b6e in BKE_screen_find_big_area D:\blender-git\blender\source\blender\blenkernel\intern\screen.c:947

Full output: P2658

It crashes with open_mainfile too.

Removing the save and then saving manually once the operator finishes is fine.

I can reproduce this crash on both the current 3.0 release, as well as on a 3.1 alpha build. I couldn't use the files to test in 2.93; it complains about an unsupported format. However, if I save the default camera+cube scene over `crashme.blend` and then run the operator, 2.93 does not crash. Exact steps: 1. Install the crashme.zip add-on and enable it 2. Create C:\Documents, if that folder doesn't already exist (the script errors out otherwise) 3. Run the "Crash me" operator from the F3 menu 4. Crash It triggers an access violation in the release build. In the debug build, it produces the following ASan output: ``` ERROR: AddressSanitizer: global-buffer-overflow on address 0x0000000000d0 at pc 0x7ff745d20b6f bp 0x001a80ffba00 sp 0x001a80ffba08 READ of size 8 at 0x0000000000d0 thread T0 #0 0x7ff745d20b6e in BKE_screen_find_big_area D:\blender-git\blender\source\blender\blenkernel\intern\screen.c:947 ``` Full output: [P2658](https://archive.blender.org/developer/P2658.txt) It crashes with `open_mainfile` too. Removing the save and then saving manually once the operator finishes is fine.

Fen commented

2021-12-11 17:18:52 +01:00

I see the cause was already found in #93949, so that's good. I'm confused about how this is different from that issue, though.

Richard Antalik commented

2021-12-13 01:47:51 +01:00

It's same issue, so I will merge.

Richard Antalik commented

2021-12-13 01:48:13 +01:00

Closed as duplicate of #93949

Richard Antalik closed this issue

2021-12-13 01:48:13 +01:00

Sign in to join this conversation.

No Label

Download

What's New

Blender Studio

Manual

Developers Blog

Documentation

Benchmark

Blender Conference

Development Fund

One-time Donations

Blender 3.0 crashes using load/save with python. #93950