custom render engine crashes blender by consecutive hitting f12 #46176

New Issue

Jakub Uhlik · 2015-09-20T05:43:56+02:00

Jakub Uhlik commented

2015-09-20 05:43:56 +02:00

System Information
Mac OS X 10.9.4

Blender Version
Broken: 2.75a c27589e
Worked: (optional)

Short description of error
Segmentation fault: 11

Exact steps for others to reproduce the error
open attached blend, click 'Run Script' in Text editor, choose 'Crash Renderer' from dropdown list in Info header and start hitting F12 until it crashes, usually 5 to 10 times is enough, but sometimes it take longer or even shorter. Hit F12, wait a second to finish, then again and again.. If it takes a bit longer to crash try hitting F12 faster. I've attached 3 crash reports #1 is the most common

**System Information** Mac OS X 10.9.4 **Blender Version** Broken: 2.75a c27589e Worked: (optional) **Short description of error** Segmentation fault: 11 **Exact steps for others to reproduce the error** open attached blend, click 'Run Script' in Text editor, choose 'Crash Renderer' from dropdown list in Info header and start hitting F12 until it crashes, usually 5 to 10 times is enough, but sometimes it take longer or even shorter. Hit F12, wait a second to finish, then again and again.. If it takes a bit longer to crash try hitting F12 faster. I've attached 3 crash reports #1 is the most common [crash.crash-1.txt](https://archive.blender.org/developer/F235553/crash.crash-1.txt) [crash.crash-2.txt](https://archive.blender.org/developer/F235555/crash.crash-2.txt) [crash.crash-3.txt](https://archive.blender.org/developer/F235554/crash.crash-3.txt) [crash.blend](https://archive.blender.org/developer/F235556/crash.blend)

Jakub Uhlik commented

2015-09-20 05:43:56 +02:00

Changed status to: 'Open'

Jakub Uhlik commented

2015-09-20 05:43:56 +02:00

Added subscriber: @JakubUhlik

Bastien Montagne commented

2015-09-20 09:33:28 +02:00

Added subscribers: @Sergey, @mont29

Bastien Montagne commented

2015-09-20 09:33:28 +02:00

Can confirm the crash here, but think you are doing some very bad things in this script - rendering is called from threaded context, modifying the scene itself from there is calling for problems imho. @Sergey should know better about this subject, though?

Jakub Uhlik commented

2015-09-20 14:47:39 +02:00

yea, i know, it's not quite nice solution, but i can't find any other way to get hair root position on uv for child particles. uv_on_emitter accepts only Particles..
anyway, the whole project is here, if interested: https:*github.com/uhlik/blendmaxwell

yea, i know, it's not quite nice solution, but i can't find any other way to get hair root position on uv for child particles. uv_on_emitter accepts only Particles.. anyway, the whole project is here, if interested: [https:*github.com/uhlik/blendmaxwell ](https:*github.com/uhlik/blendmaxwell)

Brecht Van Lommel commented

2015-09-21 12:36:14 +02:00

Added subscriber: @brecht

Brecht Van Lommel commented

2015-09-21 12:36:14 +02:00

Your script is exporting data in the render() method, but you should use the update() method for that, which ensures the UI is locked while you are making changes to the scene.

Your script is exporting data in the `render()` method, but you should use the `update()` method for that, which ensures the UI is locked while you are making changes to the scene.

Sergey Sharybin commented

2015-09-21 15:55:19 +02:00

Changed status from 'Open' to: 'Archived'

Sergey Sharybin closed this issue

2015-09-21 15:55:19 +02:00

Sergey Sharybin self-assigned this 2015-09-21 15:55:19 +02:00

Sergey Sharybin commented

2015-09-21 15:55:19 +02:00

As @brecht pointed out already you simply misusing the API. render() shouldn't access any blender data, it'll never be safe. Use update() callback to synchronize blender scene to your renderer.

Thanks for the report, but closing it now.

As @brecht pointed out already you simply misusing the API. `render()` shouldn't access any blender data, it'll never be safe. Use `update()` callback to synchronize blender scene to your renderer. Thanks for the report, but closing it now.

Jakub Uhlik commented

2015-09-21 17:23:38 +02:00

hi, what you mean is, put everything to update() and leave render() empty, right? i am exporting file for external renderer anyway. but when i do that, it crashes the same way as before..

btw, i put everything in render() because example in documentation says: 'This is the only method called by blender, ...'

hi, what you mean is, put everything to `update()` and leave `render()` empty, right? i am exporting file for external renderer anyway. but when i do that, it crashes the same way as before.. btw, i put everything in `render()` because example in documentation says: 'This is the only method called by blender, ...'

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

custom render engine crashes blender by consecutive hitting f12 #46176