From 221af991c2474a8f382042b667269e3346dab25e Mon Sep 17 00:00:00 2001
From: Vojtech Bubnik <bubnikv@gmail.com>
Date: Fri, 14 May 2021 11:52:33 +0200
Subject: [PATCH] Fixed update of PrintRegions after removing an object. The
 bug has been introduced during recent PrintRegion refactoring.

---
 src/libslic3r/PrintApply.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/libslic3r/PrintApply.cpp b/src/libslic3r/PrintApply.cpp
index f0e262fdc..c906a0041 100644
--- a/src/libslic3r/PrintApply.cpp
+++ b/src/libslic3r/PrintApply.cpp
@@ -372,6 +372,7 @@ Print::ApplyStatus Print::apply(const Model &model, DynamicPrintConfig new_full_
     std::set<ModelObjectStatus> model_object_status;
 
     // 1) Synchronize model objects.
+    bool print_regions_reshuffled = false;
     if (model.id() != m_model.id()) {
         // Kill everything, initialize from scratch.
         // Stop background processing.
@@ -383,6 +384,7 @@ Print::ApplyStatus Print::apply(const Model &model, DynamicPrintConfig new_full_
 			delete object;
         }
         m_objects.clear();
+        print_regions_reshuffled = true;
         m_model.assign_copy(model);
 		for (const ModelObject *model_object : m_model.objects)
 			model_object_status.emplace(model_object->id(), ModelObjectStatus::New);
@@ -462,6 +464,7 @@ Print::ApplyStatus Print::apply(const Model &model, DynamicPrintConfig new_full_
                 }
                 for (ModelObject *model_object : model_objects_old)
                     delete model_object;
+                print_regions_reshuffled = true;
             }
         }
     }
@@ -595,7 +598,6 @@ Print::ApplyStatus Print::apply(const Model &model, DynamicPrintConfig new_full_
     }
 
     // 4) Generate PrintObjects from ModelObjects and their instances.
-    bool print_regions_reshuffled = false;
     {
         PrintObjectPtrs print_objects_new;
         print_objects_new.reserve(std::max(m_objects.size(), m_model.objects.size()));