Blender crashes when using an EnumProperty to set Space #100519

New Issue

Kevin C. Burke · 2022-08-20T08:15:20+02:00

Kevin C. Burke commented

2022-08-20 08:15:20 +02:00

System Information
Operating system: Windows-10-10.0.22000-SP0 64 Bits
Graphics card: NVIDIA GeForce RTX 3090/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 516.94

Blender Version
Broken: version: 3.4.0 Alpha, branch: Timeline-Changes (modified), commit date: 2022-08-05 08:51, hash: 009e1324c9
Worked: (newest version of Blender that worked as expected)

Short description of error
In this script, I'm using context.area.type with a property to change the Space type. It caused Blender to crash.

Exact steps for others to reproduce the error

Running this script from the Text Editor (below)
Switch to Graph Editor or Dope Sheet
Click new property buttons on right of Header

import bpy
from bpy.types import PropertyGroup
from bpy.props import EnumProperty

def set_space(self,value):
    context = bpy.context

    for area in context.screen.areas:
        if area != context.area:
            break

    override = {'region': area.regions[0]}

    if value == 0:
        context.area.type = "GRAPH_EDITOR"
    elif value == 1:
        context.area.type = "DOPESHEET_EDITOR"

class SWITCH_PG_switcher_props(PropertyGroup):
    space: EnumProperty(
        name="Space Target",
        description="Switch to space",
        items=(
            ('GRAPH_EDITOR', "", "Graph Editor", "GRAPH", 0),
            ('DOPESHEET_EDITOR', "", "Dopesheet Editor", "ACTION", 1),
        ),
        default='GRAPH_EDITOR',
        set = set_space
        )

def draw_enum(self, context):
    layout = self.layout
    scene = context.scene
    layout.prop(scene.switcher, "space", icon_only=True, expand=True)

def register():
    bpy.utils.register_class(SWITCH_PG_switcher_props)
    bpy.types.Scene.switcher = bpy.props.PointerProperty(type=SWITCH_PG_switcher_props)
    bpy.types.DOPESHEET_HT_header.append(draw_enum)
    bpy.types.GRAPH_HT_header.append(draw_enum)

def unregister():
    del bpy.types.Scene.switcher
    bpy.types.DOPESHEET_HT_header.remove(draw_enum)
    bpy.types.GRAPH_HT_header.remove(draw_enum)
    bpy.utils.unregister_class(SWITCH_PG_switcher_props)

if __name__ == "__main__":
    register()

Setting the context.area.type in Python seems to cause others' scripts to crash:
Performing a Translate Operation after switching the context area crashes Blender

**System Information** Operating system: Windows-10-10.0.22000-SP0 64 Bits Graphics card: NVIDIA GeForce RTX 3090/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 516.94 **Blender Version** Broken: version: 3.4.0 Alpha, branch: Timeline-Changes (modified), commit date: 2022-08-05 08:51, hash: `009e1324c9` Worked: (newest version of Blender that worked as expected) **Short description of error** In this script, I'm using `context.area.type` with a property to change the Space type. It caused Blender to crash. **Exact steps for others to reproduce the error** 1. Running this script from the Text Editor (below) 2. Switch to Graph Editor or Dope Sheet 3. Click new property buttons on right of Header ``` import bpy from bpy.types import PropertyGroup from bpy.props import EnumProperty def set_space(self,value): context = bpy.context for area in context.screen.areas: if area != context.area: break override = {'region': area.regions[0]} if value == 0: context.area.type = "GRAPH_EDITOR" elif value == 1: context.area.type = "DOPESHEET_EDITOR" class SWITCH_PG_switcher_props(PropertyGroup): space: EnumProperty( name="Space Target", description="Switch to space", items=( ('GRAPH_EDITOR', "", "Graph Editor", "GRAPH", 0), ('DOPESHEET_EDITOR', "", "Dopesheet Editor", "ACTION", 1), ), default='GRAPH_EDITOR', set = set_space ) def draw_enum(self, context): layout = self.layout scene = context.scene layout.prop(scene.switcher, "space", icon_only=True, expand=True) def register(): bpy.utils.register_class(SWITCH_PG_switcher_props) bpy.types.Scene.switcher = bpy.props.PointerProperty(type=SWITCH_PG_switcher_props) bpy.types.DOPESHEET_HT_header.append(draw_enum) bpy.types.GRAPH_HT_header.append(draw_enum) def unregister(): del bpy.types.Scene.switcher bpy.types.DOPESHEET_HT_header.remove(draw_enum) bpy.types.GRAPH_HT_header.remove(draw_enum) bpy.utils.unregister_class(SWITCH_PG_switcher_props) if __name__ == "__main__": register() ``` Setting the `context.area.type` in Python seems to cause others' scripts to crash: [Performing a Translate Operation after switching the context area crashes Blender ](https://blenderartists.org/t/performing-a-translate-operation-after-switching-the-context-area-crashes-blender/1164763)

Kevin C. Burke commented

2022-08-20 08:15:20 +02:00

Added subscriber: @KevinCBurke

yonghao lv commented

2022-08-20 10:53:13 +02:00

Added subscriber: @1029910278

yonghao lv commented

2022-08-20 10:53:13 +02:00

It is a bug I think #98514

Robert Guetzkow commented

2022-08-20 12:20:39 +02:00

Added subscriber: @rjg

Robert Guetzkow commented

2022-08-20 12:20:39 +02:00

It seems that ui_region_find_active_but provides an invalid pointer when called in ui_region_handler.

It seems that `ui_region_find_active_but` provides an invalid pointer when called in `ui_region_handler`.

Robert Guetzkow commented

2022-08-20 12:22:47 +02:00

Changed status from 'Needs Triage' to: 'Confirmed'

Campbell Barton commented

2022-08-23 09:45:25 +02:00

Added subscriber: @ideasman42

Campbell Barton commented

2022-08-23 09:45:25 +02:00

RNA properties that manipulate the context aren't supported. Looking into the back trace, supporting them would require larger changes to how the UI handles button updates, and these changes don't give provide many benefits besides supporting this particular use-case.

It would be good if the crash could be avoided, so setting as a known-issue.

RNA properties that manipulate the context aren't supported. Looking into the back trace, supporting them would require larger changes to how the UI handles button updates, and these changes don't give provide many benefits besides supporting this particular use-case. It would be good if the crash could be avoided, so setting as a known-issue.

Philipp Oeser removed the

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Blender crashes when using an EnumProperty to set Space #100519