From ea62d7b8fb3f6cca53f6d7e95dd78b822c92f85c Mon Sep 17 00:00:00 2001
From: tamasmeszaros <meszaros.q@gmail.com>
Date: Wed, 19 Jul 2023 15:04:33 +0200
Subject: [PATCH] Fix SLA crash

---
 src/libslic3r/Arrange/ArrangeImpl.hpp  | 2 +-
 src/libslic3r/Arrange/SceneBuilder.cpp | 2 ++
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/libslic3r/Arrange/ArrangeImpl.hpp b/src/libslic3r/Arrange/ArrangeImpl.hpp
index 0b0949de28..cebc31ac4a 100644
--- a/src/libslic3r/Arrange/ArrangeImpl.hpp
+++ b/src/libslic3r/Arrange/ArrangeImpl.hpp
@@ -399,7 +399,7 @@ ArrItem AdvancedItemConverter<ArrItem>::get_arritem(const Arrangeable &arrbl,
     if (infl != 0) {
         outline = offset_ex(outline, infl);
         if (! envelope.empty())
-            envelope = offset_ex(outline, infl);
+            envelope = offset_ex(envelope, infl);
     }
 
     ArrItem ret;
diff --git a/src/libslic3r/Arrange/SceneBuilder.cpp b/src/libslic3r/Arrange/SceneBuilder.cpp
index ba3279a225..40208d0a30 100644
--- a/src/libslic3r/Arrange/SceneBuilder.cpp
+++ b/src/libslic3r/Arrange/SceneBuilder.cpp
@@ -632,6 +632,8 @@ ExPolygons ArrangeableSLAPrintObject::full_outline() const
         Polygons ptmp = project_mesh(smesh.its, trafo_instance, [] {});
         std::move(ptmp.begin(), ptmp.end(), std::back_inserter(polys));
         ret = union_ex(polys);
+    } else {
+        ret = m_arrbl->full_outline();
     }
 
     return ret;