Python update-Callback infinite recursion #27793

New Issue

christian l · 2011-06-28T12:50:53+02:00

christian l commented

2011-06-28 12:50:53 +02:00

%%%Hi,

OS: Windows 7 64bit
3D-Card: Nvidia GTX 560
Blender Version: 2.58 r37724

the new update-callbacks for python go into a (indirect) recursion
if the variable which called the update-callback is changed within the update-callback.
The following example crashes if the String- and IntProperty are changed.
If the StringProperty is substituted with a FloatProperty or if only the StringProperty is changed
it doesnt crash.

import bpy

def func(self, context):

  bpy.context.scene.my_settings.my_int = 2
  bpy.context.scene.my_settings.my_string = "crash"

class MaterialSettings(bpy.types.PropertyGroup):

  my_int = bpy.props.IntProperty(update=func)
  my_string = bpy.props.StringProperty(update=func)

bpy.utils.register_class(MaterialSettings)

bpy.types.Scene.my_settings = \

  bpy.props.PointerProperty(type=MaterialSettings)

bpy.context.scene.my_settings.my_string = "start"
bpy.context.scene.my_settings.my_int = 2
%%%

%%%Hi, OS: Windows 7 64bit 3D-Card: Nvidia GTX 560 Blender Version: 2.58 r37724 the new update-callbacks for python go into a (indirect) recursion if the variable which called the update-callback is changed within the update-callback. The following example crashes if the String- and IntProperty are changed. If the StringProperty is substituted with a FloatProperty or if only the StringProperty is changed it doesnt crash. import bpy def func(self, context): ``` bpy.context.scene.my_settings.my_int = 2 bpy.context.scene.my_settings.my_string = "crash" ``` class MaterialSettings(bpy.types.PropertyGroup): ``` my_int = bpy.props.IntProperty(update=func) my_string = bpy.props.StringProperty(update=func) ``` bpy.utils.register_class(MaterialSettings) bpy.types.Scene.my_settings = \ ``` bpy.props.PointerProperty(type=MaterialSettings) ``` bpy.context.scene.my_settings.my_string = "start" bpy.context.scene.my_settings.my_int = 2 %%%

christian l commented

2011-06-28 12:50:53 +02:00

Changed status to: 'Open'

Ton Roosendaal commented

2011-07-10 15:56:23 +02:00

%%%Assigning to campbell, he's with holidays now so it'll take a week or more.%%%

Sergey Sharybin commented

2011-12-02 16:28:32 +01:00

%%%Campbell, do you have any progress here? :)%%%

Campbell Barton commented

2012-09-28 11:36:20 +02:00

%%%Thinking about this, a property update function should remain low level, IMHO its reasonable to have users responsible for not getting into problematic situations where infinite recursion happens, Added note to docs saying this.

closing.%%%

%%%Thinking about this, a property update function should remain low level, IMHO its reasonable to have users responsible for not getting into problematic situations where infinite recursion happens, Added note to docs saying this. closing.%%%

Campbell Barton commented

2012-09-28 11:36:20 +02:00

Changed status from 'Open' to: 'Archived'

Campbell Barton closed this issue

2012-09-28 11:36:20 +02:00

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Python update-Callback infinite recursion #27793