From 1659e4c77f27cab6406415869d6d251dcdda4128 Mon Sep 17 00:00:00 2001
From: Vojtech Bubnik <bubnikv@gmail.com>
Date: Thu, 29 Jul 2021 15:02:16 +0200
Subject: [PATCH] Fixed splitting of triangle meshes, where the splitting
 function may produce a single triangle, which is then removed by the repair
 function.

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

diff --git a/src/libslic3r/Model.cpp b/src/libslic3r/Model.cpp
index f6980e5b2..0b9614fa2 100644
--- a/src/libslic3r/Model.cpp
+++ b/src/libslic3r/Model.cpp
@@ -1699,6 +1699,10 @@ size_t ModelVolume::split(unsigned int max_extruders)
 
     for (TriangleMesh *mesh : meshptrs) {
         mesh->repair();
+        if (mesh->empty())
+            // Repair may have removed unconnected triangles, thus emptying the mesh.
+            continue;
+
         if (idx == 0)
         {
             this->set_mesh(std::move(*mesh));