Python: How can I change custom property for multiple objects at once?

Question

I have defined a custom EnumProperty for objects. I want to be able to change the property for all selected objects simultaneously. I tried this:

def set_collider(self, context):
    selected_objs = context.selected_objects
    collider = context.active_object.ECollider
    for obj in selected_objs:
        if obj != context.active_object:
            obj.ECollider = collider

bpy.types.Object.ECollider = EnumProperty(
    items=[('NC', 'None', ''), ('BC', 'Box Collider', ''), ('SC', 'Sphere Collider', '' ), ('CC', 'Capsule Collider', '')], name="Collider", update=set_collider
)

but for some reason blender crashes every time I select multiple objects and change the ECollider property through the UI panel.
Of course I can always right click on the property and select Copy to Selected but it would be more convenient if I could change the property for all selected objects at once.

Answer 1

Instead of accessing the ECollider like this: object.ECollider now I access it this way: object['ECollider'] and everything works fine. Full code modification:

def set_collider(self, context):
    selected_objs = context.selected_objects
    collider = context.active_object['ECollider']
    for obj in selected_objs:
        if obj != context.active_object:
            obj['ECollider'] = collider

bpy.types.Object.ECollider = EnumProperty(
    items=[('NC', 'None', ''), ('BC', 'Box Collider', ''), ('SC', 'Sphere Collider', '' ), ('CC', 'Capsule Collider', '')], name="Collider", update=set_collider
)