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Maniphest T38489

EnumProperty with ENUM_FLAG and item callback crashes on click
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Description

System Information
Windows 7, 64bit

Blender Version
Broken: 6852184 (2014-02-03, master modified)
Worked: 2.69 official (at least no crash)

Short description of error
A dynamically populated EnumProperty (items <- func) with ENUM_FLAG for multi-select crashes on click. No crash in 2.69 but:
Memoryblock free: pointer not in memlist

Exact steps for others to reproduce the error
Run attached script in 2.69 official, and see Object tab panel at the bottom. Select an object type and see how the second dropdown reacts (may clear label on change, although the property value doesn't change??)

Run it with a recent build, click on it and see it crashing.

The second property is not related to the crash. No crash with static enum items.

dynamic_enum_multiselect_enum_flag.py1 KBDownload

Event Timeline

codemanx created this task.Feb 4 2014, 7:55 PM
codemanx raised the priority of this task from to 90.
codemanx updated the task description. (Show Details)
codemanx added projects: BF Blender, Add-ons (BF-Blender).
codemanx edited a custom field.
codemanx added a subscriber: codemanx.
Campbell Barton (campbellbarton) changed the task status from Unknown Status to Resolved.Feb 5 2014, 1:13 PM
Campbell Barton (campbellbarton) claimed this task.

Fixed the incorrect memfree, however the script still crashes, this is a known problem with dynamic defined items.

A workaround is to store the return value from items_prop1 somewhere. eg:

def items_prop1(self, context):
    types = {ob.type: ob.type for ob in context.scene.objects}
    items_prop1.ret = [(t, t, "") for t in types]
    return items_prop1.ret