From e99382da680da615b7fd1886ed8e1252d1a4be9c Mon Sep 17 00:00:00 2001
From: Rodrigo Faselli <162915171+RF47@users.noreply.github.com>
Date: Wed, 22 Apr 2026 13:21:19 -0300
Subject: [PATCH] =?UTF-8?q?=F0=9F=92=A5Fix=20crash=20svg=20use=20surface?=
 =?UTF-8?q?=20(#13262)?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

* Fix crash svg use surface

* unnecesarry header
---
 src/libslic3r/CutSurface.cpp | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/src/libslic3r/CutSurface.cpp b/src/libslic3r/CutSurface.cpp
index 01a5a8383a..606a5b8aaa 100644
--- a/src/libslic3r/CutSurface.cpp
+++ b/src/libslic3r/CutSurface.cpp
@@ -2559,6 +2559,21 @@ void priv::create_face_types(FaceTypeMap           &map,
 bool priv::clip_cut(SurfacePatch &cut, CutMesh clipper)
 {
     CutMesh& tm = cut.mesh; 
+    auto is_mesh_usable_for_clip = [](const CutMesh &mesh) {
+        return !mesh.is_empty() &&
+               mesh.number_of_vertices() >= 3 &&
+               mesh.number_of_faces() > 0 &&
+               mesh.is_valid(false);
+    };
+
+    if (!is_mesh_usable_for_clip(tm) || !is_mesh_usable_for_clip(clipper))
+        return false;
+
+    // Hard-stop pathological inputs before entering corefinement internals.
+    if (CGAL::Polygon_mesh_processing::does_self_intersect(tm) ||
+        CGAL::Polygon_mesh_processing::does_self_intersect(clipper))
+        return false;
+
     // create backup for case that there is no intersection
     CutMesh backup_copy = tm;