EEVEE: Fix crash when using motion blur without postfx blur

source/blender/draw/engines/eevee/eevee_engine.c

@@ -470,8 +470,6 @@ static void eevee_render_to_image(void *vedata,
         /* The previous step of this iteration N is exactly the next step of iteration N - 1.
          * So we just swap the resources to avoid too much re-evaluation. */
         EEVEE_motion_blur_swap_data(vedata);
-
-        DRW_cache_restart();
       }
       else {
         EEVEE_motion_blur_step_set(ved, MB_PREV);
@@ -536,6 +534,12 @@ static void eevee_render_to_image(void *vedata,
 
       EEVEE_temporal_sampling_create_view(vedata);
       EEVEE_render_draw(vedata, engine, render_layer, rect);
+
+      if (i < time_steps_tot - 1) {
+        /* Don't reset after the last loop. Since EEVEE_render_read_result
+         * might need some DRWPasses. */
+        DRW_cache_restart();
+      }
     }
   }