Fix crash with Alembic export after recent persistent data bugfix

We weren't clearing the recalc flags for that case.

source/blender/blenkernel/BKE_scene.h

@@ -152,6 +152,7 @@ void BKE_scene_graph_update_tagged(struct Depsgraph *depsgraph, struct Main *bma
 void BKE_scene_graph_evaluated_ensure(struct Depsgraph *depsgraph, struct Main *bmain);
 
 void BKE_scene_graph_update_for_newframe(struct Depsgraph *depsgraph);
+void BKE_scene_graph_update_for_newframe_ex(struct Depsgraph *depsgraph, const bool clear_recalc);
 
 void BKE_scene_view_layer_graph_evaluated_ensure(struct Main *bmain,
                                                  struct Scene *scene,

source/blender/blenkernel/intern/scene.c

@@ -2682,7 +2682,8 @@ static void scene_graph_update_tagged(Depsgraph *depsgraph, Main *bmain, bool on
     }
 
     /* Clear recalc flags for second pass, but back them up for editors update. */
-    DEG_ids_clear_recalc(depsgraph, true);
+    const bool backup = true;
+    DEG_ids_clear_recalc(depsgraph, backup);
     used_multiple_passes = true;
     run_callbacks = false;
   }
@@ -2691,7 +2692,11 @@ static void scene_graph_update_tagged(Depsgraph *depsgraph, Main *bmain, bool on
   if (used_multiple_passes) {
     DEG_ids_restore_recalc(depsgraph);
   }
-  DEG_editors_update(depsgraph, false);
+  const bool is_time_update = false;
+  DEG_editors_update(depsgraph, is_time_update);
+
+  const bool backup = false;
+  DEG_ids_clear_recalc(depsgraph, backup);
 }
 
 void BKE_scene_graph_update_tagged(Depsgraph *depsgraph, Main *bmain)
@@ -2705,10 +2710,9 @@ void BKE_scene_graph_evaluated_ensure(Depsgraph *depsgraph, Main *bmain)
 }
 
 /* applies changes right away, does all sets too */
-void BKE_scene_graph_update_for_newframe(Depsgraph *depsgraph)
+void BKE_scene_graph_update_for_newframe_ex(Depsgraph *depsgraph, const bool clear_recalc)
 {
   Scene *scene = DEG_get_input_scene(depsgraph);
-  ViewLayer *view_layer = DEG_get_input_view_layer(depsgraph);
   Main *bmain = DEG_get_bmain(depsgraph);
   bool used_multiple_passes = false;
 
@@ -2755,7 +2759,8 @@ void BKE_scene_graph_update_for_newframe(Depsgraph *depsgraph)
     }
 
     /* Clear recalc flags for second pass, but back them up for editors update. */
-    DEG_ids_clear_recalc(depsgraph, true);
+    const bool backup = true;
+    DEG_ids_clear_recalc(depsgraph, backup);
     used_multiple_passes = true;
   }
 
@@ -2763,7 +2768,21 @@ void BKE_scene_graph_update_for_newframe(Depsgraph *depsgraph)
   if (used_multiple_passes) {
     DEG_ids_restore_recalc(depsgraph);
   }
-  DEG_editors_update(depsgraph, true);
+
+  const bool is_time_update = true;
+  DEG_editors_update(depsgraph, is_time_update);
+
+  /* Clear recalc flags, can be skipped for e.g. renderers that will read these
+   * and clear the flags later. */
+  if (clear_recalc) {
+    const bool backup = false;
+    DEG_ids_clear_recalc(depsgraph, backup);
+  }
+}
+
+void BKE_scene_graph_update_for_newframe(Depsgraph *depsgraph)
+{
+  BKE_scene_graph_update_for_newframe_ex(depsgraph, true);
 }
 
 /**
@@ -3523,8 +3542,8 @@ GHash *BKE_scene_undo_depsgraphs_extract(Main *bmain)
 
   for (Scene *scene = bmain->scenes.first; scene != NULL; scene = scene->id.next) {
     if (scene->depsgraph_hash == NULL) {
-      /* In some cases, e.g. when undo has to perform multiple steps at once, no depsgraph will be
-       * built so this pointer may be NULL. */
+      /* In some cases, e.g. when undo has to perform multiple steps at once, no depsgraph will
+       * be built so this pointer may be NULL. */
       continue;
     }
     for (ViewLayer *view_layer = scene->view_layers.first; view_layer != NULL;

source/blender/depsgraph/DEG_depsgraph.h

@@ -143,8 +143,7 @@ void DEG_id_type_tag(struct Main *bmain, short id_type);
  * for viewport depsgraphs, but not render or export depsgraph for example. */
 void DEG_enable_editors_update(struct Depsgraph *depsgraph);
 
-/* Check if something was changed in the database and inform editors about this,
- * then clear recalc flags. */
+/* Check if something was changed in the database and inform editors about this. */
 void DEG_editors_update(struct Depsgraph *depsgraph, bool time);
 
 /* Clear recalc flags after editors or renderers have handled updates. */

source/blender/depsgraph/intern/depsgraph_tag.cc

@@ -842,8 +842,6 @@ void DEG_editors_update(Depsgraph *depsgraph, bool time)
   update_ctx.scene = scene;
   update_ctx.view_layer = view_layer;
   deg::deg_editors_scene_update(&update_ctx, updated);
-
-  DEG_ids_clear_recalc(depsgraph, false);
 }
 
 static void deg_graph_clear_id_recalc_flags(ID *id)

source/blender/render/intern/engine.c

@@ -690,7 +690,7 @@ static void engine_depsgraph_init(RenderEngine *engine, ViewLayer *view_layer)
   }
   else {
     /* Go through update with full Python callbacks for regular render. */
-    BKE_scene_graph_update_for_newframe(engine->depsgraph);
+    BKE_scene_graph_update_for_newframe_ex(engine->depsgraph, false);
   }
 
   engine->has_grease_pencil = DRW_render_check_grease_pencil(engine->depsgraph);
@@ -725,7 +725,7 @@ void RE_engine_frame_set(RenderEngine *engine, int frame, float subframe)
 
   CLAMP(cfra, MINAFRAME, MAXFRAME);
   BKE_scene_frame_set(re->scene, cfra);
-  BKE_scene_graph_update_for_newframe(engine->depsgraph);
+  BKE_scene_graph_update_for_newframe_ex(engine->depsgraph, false);
 
   BKE_scene_camera_switch_update(re->scene);
 }