Fixed crashing at exiting

demos/optical_bench/src/laser_menu.cpp

@@ -164,12 +164,8 @@ LaserMenu::~LaserMenu() {
   delete down_tc_;
   delete clear_target_;
   delete switch_tw_;
-  delete text_tw_;
   delete slider_wlength_;
-  delete text_wlength_;
   delete slider_width_;
-  delete text_width_;
-  delete text_tc_;
 }
 
 void LaserMenu::SetCurrentWaveLength(float f) { slider_wlength_->SetValue(f); }

demos/optical_bench/src/lens_menu.cpp

@@ -149,12 +149,6 @@ LensMenu::~LensMenu() {
   delete slider_radius2_;
   delete slider_thickness_;
 
-  delete text_lens_radius_;
-  delete text_radius1_;
-  delete text_radius2_;
-  delete text_thickness_;
-  delete text_gl_;
-
   delete up_l1_;
   delete down_l1_;
   delete up_l2_;

demos/optical_bench/src/optix_context_manager.cpp

@@ -83,7 +83,7 @@ OptixContextManager::OptixContextManager() {
 OptixContextManager::~OptixContextManager() {
   if (context_) {
     top_object_->destroy();
-    debug_material_->destroy();
+    // debug_material_->destroy();
     target_material_->destroy();
     lens_geomerty_->destroy();
     target_geomerty_->destroy();