Fix T72751: Timeline crash from overridden scene.

Depsgraph RNA pointer would generate infinite loop in override comparisons.

Depsgraph pointer should never be considered here anyway, this is purely
runtime data.

2 files changed, 3 insertions, 0 deletions

diff --git a/source/blender/makesrna/RNA_types.h b/source/blender/makesrna/RNA_types.h
index 6a60f09919b..243c3f049c7 100644
--- a/source/blender/makesrna/RNA_types.h
+++ b/source/blender/makesrna/RNA_types.h
@@ -292,6 +292,8 @@ typedef enum PropertyOverrideFlag {
   /**
    * Forbid usage of this property in comparison (& hence override) code.
    * Useful e.g. for collections of data like mesh's geometry, particles, etc.
+   * Also for runtime data that should never be considered as part of actual Blend data (e.g.
+   * dpesgraph from ViewLayers...).
    */
   PROPOVERRIDE_NO_COMPARISON = (1 << 1),
 
diff --git a/source/blender/makesrna/intern/rna_layer.c b/source/blender/makesrna/intern/rna_layer.c
index 721fc8dddff..bf8df14d258 100644
--- a/source/blender/makesrna/intern/rna_layer.c
+++ b/source/blender/makesrna/intern/rna_layer.c
@@ -595,6 +595,7 @@ void RNA_def_view_layer(BlenderRNA *brna)
   /* Dependency Graph */
   prop = RNA_def_property(srna, "depsgraph", PROP_POINTER, PROP_NONE);
   RNA_def_property_struct_type(prop, "Depsgraph");
+  RNA_def_property_override_flag(prop, PROPOVERRIDE_NO_COMPARISON);
   RNA_def_property_ui_text(prop, "Dependency Graph", "Dependencies in the scene data");
   RNA_def_property_pointer_funcs(prop, "rna_ViewLayer_depsgraph_get", NULL, NULL, NULL);