Fix T87283: crash with persistent data and motion blur

intern/cycles/blender/blender_session.cpp

@@ -498,7 +498,7 @@ void BlenderSession::render(BL::Depsgraph &b_depsgraph_)
 
   /* Compute render passes and film settings. */
   vector<Pass> passes = sync->sync_render_passes(
-      b_rlay, b_view_layer, session_params.adaptive_sampling, session_params.denoising);
+      b_scene, b_rlay, b_view_layer, session_params.adaptive_sampling, session_params.denoising);
 
   /* Set buffer params, using film settings from sync_render_passes. */
   buffer_params.passes = passes;

intern/cycles/blender/blender_sync.cpp

@@ -569,7 +569,8 @@ int BlenderSync::get_denoising_pass(BL::RenderPass &b_pass)
   return -1;
 }
 
-vector<Pass> BlenderSync::sync_render_passes(BL::RenderLayer &b_rlay,
+vector<Pass> BlenderSync::sync_render_passes(BL::Scene &b_scene,
+                                             BL::RenderLayer &b_rlay,
                                              BL::ViewLayer &b_view_layer,
                                              bool adaptive_sampling,
                                              const DenoiseParams &denoising)
@@ -580,7 +581,7 @@ vector<Pass> BlenderSync::sync_render_passes(BL::RenderLayer &b_rlay,
   for (BL::RenderPass &b_pass : b_rlay.passes) {
     PassType pass_type = get_pass_type(b_pass);
 
-    if (pass_type == PASS_MOTION && scene->integrator->get_motion_blur())
+    if (pass_type == PASS_MOTION && !b_scene.render().use_motion_blur())
       continue;
     if (pass_type != PASS_NONE)
       Pass::add(pass_type, passes, b_pass.name().c_str());

intern/cycles/blender/blender_sync.h

@@ -74,7 +74,8 @@ class BlenderSync {
                  int height,
                  void **python_thread_state);
   void sync_view_layer(BL::SpaceView3D &b_v3d, BL::ViewLayer &b_view_layer);
-  vector<Pass> sync_render_passes(BL::RenderLayer &b_render_layer,
+  vector<Pass> sync_render_passes(BL::Scene &b_scene,
+                                  BL::RenderLayer &b_render_layer,
                                   BL::ViewLayer &b_view_layer,
                                   bool adaptive_sampling,
                                   const DenoiseParams &denoising);

source/blender/render/intern/engine.c

@@ -717,6 +717,9 @@ void RE_engine_frame_set(RenderEngine *engine, int frame, float subframe)
     return;
   }
 
+  /* Clear recalc flags before update so engine can detect what changed. */
+  DEG_ids_clear_recalc(engine->depsgraph);
+
   Render *re = engine->re;
   double cfra = (double)frame + (double)subframe;