From 725a8daf36b0fabeecfcb0b839744f667b4484c4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Martin=20=C5=A0ach?= <martin.sachin@gmail.com>
Date: Tue, 14 Jan 2025 11:41:52 +0100
Subject: [PATCH] Fix SPE-2633: Do not move to an empty layer (#13826)

---
 src/libslic3r/GCode.cpp | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/libslic3r/GCode.cpp b/src/libslic3r/GCode.cpp
index da2deedac5..cd042eea38 100644
--- a/src/libslic3r/GCode.cpp
+++ b/src/libslic3r/GCode.cpp
@@ -2550,7 +2550,12 @@ LayerResult GCodeGenerator::process_layer(
     if (extrusions.empty()) {
         return result;
     }
-    const Geometry::ArcWelder::Segment first_segment{*GCode::ExtrusionOrder::get_first_point(extrusions)};
+
+    const auto optional_first_segment{GCode::ExtrusionOrder::get_first_point(extrusions)};
+    if (!optional_first_segment) {
+        return result;
+    }
+    const Geometry::ArcWelder::Segment &first_segment{*optional_first_segment};
     const Vec3crd first_point{to_3d(first_segment.point, scaled(print_z + (first_segment.height_fraction - 1.0) * height))};
     const PrintInstance* first_instance{get_first_instance(extrusions, instances_to_print)};
     m_label_objects.update(first_instance);