Object propertys in interface let Blender crash when pressing CTRL+Z #44580

New Issue

mic lack30 · 2015-05-01T16:57:13+02:00

mic lack30 commented

2015-05-01 16:57:13 +02:00

Windows 7 x64,CPU i7 3820, 8 GB RAM, GPU 2x GTX680

Blender 2.74.5 (94d80c8)

I'm having a custom property assigned to an object and using that in a python interface script with layout.prop(data path to object, "Name of property"). When doing some actions in the viewport and undoing them with CTRL+Z Blender crashes. When having the custom properties in the scene data blender doesn't crash.

Open the .blend
Run the Script
Go a few times in the edit mode or just do any action you can undo
Press CTRL+Z

Blender crashes

Bug.blend

Windows 7 x64,CPU i7 3820, 8 GB RAM, GPU 2x GTX680 Blender 2.74.5 (94d80c8) I'm having a custom property assigned to an object and using that in a python interface script with layout.prop(data path to object, "Name of property"). When doing some actions in the viewport and undoing them with CTRL+Z Blender crashes. When having the custom properties in the scene data blender doesn't crash. - Open the .blend - Run the Script - Go a few times in the edit mode or just do any action you can undo - Press CTRL+Z # Blender crashes [Bug.blend](https://archive.blender.org/developer/F168962/Bug.blend)

mic lack30 commented

2015-05-01 16:57:13 +02:00

Changed status to: 'Open'

mic lack30 commented

2015-05-01 16:57:13 +02:00

Added subscriber: @michaellackner

Bastien Montagne commented

2015-05-01 18:43:19 +02:00

Changed status from 'Open' to: 'Archived'

Bastien Montagne closed this issue

2015-05-01 18:43:19 +02:00

Bastien Montagne self-assigned this 2015-05-01 18:43:19 +02:00

Bastien Montagne commented

2015-05-01 18:43:19 +02:00

You are storing bpy.data.objects["Cube"] in a global var in your py script… this is one of the best ways to get Blender crashing.

You shall never ever keep a static ref to some blender data in a script - many operations in Blender (including undo) will change addresses of data, so stored py var will reference invalid memory very quickly.

See also http://www.blender.org/api/blender_python_api_2_74_0/info_gotcha.html#help-my-script-crashes-blender and next sections.

You are storing bpy.data.objects["Cube"] in a global var in your py script… this is one of the best ways to get Blender crashing. You shall **never ever** keep a static ref to some blender data in a script - many operations in Blender (including undo) will change addresses of data, so stored py var will reference invalid memory very quickly. See also http://www.blender.org/api/blender_python_api_2_74_0/info_gotcha.html#help-my-script-crashes-blender and next sections.

mic lack30 commented

2015-05-01 19:04:16 +02:00

Wow.. wasn't aware of that.. Sorry for reporting that useless bug. Keep up that great work!

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Object propertys in interface let Blender crash when pressing CTRL+Z #44580

Blender crashes