From 95d3a2b2ec516d28b9e5c62555eb7d15be5e34cf Mon Sep 17 00:00:00 2001
From: tamasmeszaros <meszaros.q@gmail.com>
Date: Tue, 28 Mar 2023 12:57:34 +0200
Subject: [PATCH] Fix CGAL exception preventing preview generation fallback

SPE-1617
---
 src/libslic3r/SLAPrintSteps.cpp | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/libslic3r/SLAPrintSteps.cpp b/src/libslic3r/SLAPrintSteps.cpp
index 5ef8a27096..b73a8c4fb1 100644
--- a/src/libslic3r/SLAPrintSteps.cpp
+++ b/src/libslic3r/SLAPrintSteps.cpp
@@ -199,7 +199,13 @@ void SLAPrint::Steps::generate_preview(SLAPrintObject &po, SLAPrintObjectStep st
         m = csgmesh_merge_positive_parts(r);
         handled = true;
     } else if (csg::check_csgmesh_booleans(r) == r.end()) {
-        auto cgalmeshptr = csg::perform_csgmesh_booleans(r);
+        MeshBoolean::cgal::CGALMeshPtr cgalmeshptr;
+        try {
+            cgalmeshptr = csg::perform_csgmesh_booleans(r);
+        } catch (...) {
+            // leaves cgalmeshptr as nullptr
+        }
+
         if (cgalmeshptr) {
             m = MeshBoolean::cgal::cgal_to_indexed_triangle_set(*cgalmeshptr);
             handled = true;