Fix T100255: Make RigidBodyWorld (and effector_weights) collections refcounted.

Those collections were so far mainly just tagged as fake user (even
though a few places in code already incremented usercount on them).

Since we now clear the fakeuser flag when linking/appending data, ensure
that these collections are preserved by making these usages regular ID
refcounting ones.

Reviewed By: brecht

Differential Revision: https://developer.blender.org/D15783

2 files changed, 3 insertions, 3 deletions

diff --git a/source/blender/makesrna/intern/rna_object_force.c b/source/blender/makesrna/intern/rna_object_force.c
index 2ed539aa511..40000a49f03 100644
--- a/source/blender/makesrna/intern/rna_object_force.c
+++ b/source/blender/makesrna/intern/rna_object_force.c
@@ -1276,7 +1276,7 @@ static void rna_def_effector_weight(BlenderRNA *brna)
   prop = RNA_def_property(srna, "collection", PROP_POINTER, PROP_NONE);
   RNA_def_property_struct_type(prop, "Collection");
   RNA_def_property_pointer_sdna(prop, NULL, "group");
-  RNA_def_property_flag(prop, PROP_EDITABLE);
+  RNA_def_property_flag(prop, PROP_EDITABLE | PROP_ID_REFCOUNT);
   RNA_def_property_ui_text(prop, "Effector Collection", "Limit effectors to this collection");
   RNA_def_property_update(prop, 0, "rna_EffectorWeight_dependency_update");
 
diff --git a/source/blender/makesrna/intern/rna_rigidbody.c b/source/blender/makesrna/intern/rna_rigidbody.c
index 0c1fd8cab3c..7a499d10d3a 100644
--- a/source/blender/makesrna/intern/rna_rigidbody.c
+++ b/source/blender/makesrna/intern/rna_rigidbody.c
@@ -865,7 +865,7 @@ static void rna_def_rigidbody_world(BlenderRNA *brna)
   prop = RNA_def_property(srna, "collection", PROP_POINTER, PROP_NONE);
   RNA_def_property_struct_type(prop, "Collection");
   RNA_def_property_pointer_sdna(prop, NULL, "group");
-  RNA_def_property_flag(prop, PROP_EDITABLE | PROP_ID_SELF_CHECK);
+  RNA_def_property_flag(prop, PROP_EDITABLE | PROP_ID_SELF_CHECK | PROP_ID_REFCOUNT);
   RNA_def_property_override_flag(prop, PROPOVERRIDE_OVERRIDABLE_LIBRARY);
   RNA_def_property_ui_text(
       prop, "Collection", "Collection containing objects participating in this simulation");
@@ -873,7 +873,7 @@ static void rna_def_rigidbody_world(BlenderRNA *brna)
 
   prop = RNA_def_property(srna, "constraints", PROP_POINTER, PROP_NONE);
   RNA_def_property_struct_type(prop, "Collection");
-  RNA_def_property_flag(prop, PROP_EDITABLE | PROP_ID_SELF_CHECK);
+  RNA_def_property_flag(prop, PROP_EDITABLE | PROP_ID_SELF_CHECK | PROP_ID_REFCOUNT);
   RNA_def_property_override_flag(prop, PROPOVERRIDE_OVERRIDABLE_LIBRARY);
   RNA_def_property_ui_text(
       prop, "Constraints", "Collection containing rigid body constraint objects");