From ff683ec0171db41bcd4119c48d793e7b2d0416e3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Martin=20=C5=A0ach?= <martin.sachin@gmail.com>
Date: Tue, 14 Jan 2025 15:14:29 +0100
Subject: [PATCH] Fix SPE-2638: do not acess opl->colors when mesh_info !=
 Color (#13859)

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

diff --git a/src/libslic3r/TriangleMeshSlicer.cpp b/src/libslic3r/TriangleMeshSlicer.cpp
index d52d126e7f..ecb9c821fd 100644
--- a/src/libslic3r/TriangleMeshSlicer.cpp
+++ b/src/libslic3r/TriangleMeshSlicer.cpp
@@ -1363,7 +1363,9 @@ static void chain_open_polylines_close_gaps(std::vector<OpenPolyline>
                     opl->points.pop_back();
                 } else {
                     // The end points are different, keep both of them.
-                    midpoint_inserted = handle_color_at_gap_between_open_polylines<mesh_info>(*opl, opl->points.front(), opl->colors.front());
+                    if constexpr (mesh_info == AdditionalMeshInfo::Color) {
+                        midpoint_inserted = handle_color_at_gap_between_open_polylines<mesh_info>(*opl, opl->points.front(), opl->colors.front());
+                    }
                 }
 
                 // When we split the gap into two pieces by adding a midpoint, then a valid polygon has at least 4 points.