From 9896721bc89bd6894837285ecb91a1453c307d03 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Luk=C3=A1=C5=A1=20Hejl?= <hejl.lukas@gmail.com>
Date: Thu, 28 Apr 2022 10:03:08 +0200
Subject: [PATCH] Fixed crash when Arachne produced empty output.

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

diff --git a/src/libslic3r/PerimeterGenerator.cpp b/src/libslic3r/PerimeterGenerator.cpp
index 76364c5c8..00b1f1abf 100644
--- a/src/libslic3r/PerimeterGenerator.cpp
+++ b/src/libslic3r/PerimeterGenerator.cpp
@@ -321,6 +321,9 @@ void PerimeterGenerator::process_arachne()
         wallToolPaths.generate();
 
         std::vector<Arachne::VariableWidthLines> perimeters = wallToolPaths.getToolPaths();
+        if (perimeters.empty())
+            continue;
+
         int start_perimeter = int(perimeters.size()) - 1;
         int end_perimeter   = -1;
         int direction       = -1;