From f90d62c7716993f85d7a19691b3e6f9b8f5659fc Mon Sep 17 00:00:00 2001
From: tamasmeszaros <meszaros.q@gmail.com>
Date: Tue, 17 May 2022 16:28:13 +0200
Subject: [PATCH] Fix crash with a single support point

---
 src/libslic3r/SLA/SupportTreeUtils.hpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/libslic3r/SLA/SupportTreeUtils.hpp b/src/libslic3r/SLA/SupportTreeUtils.hpp
index 9c3c1f5849..d5707dc5c1 100644
--- a/src/libslic3r/SLA/SupportTreeUtils.hpp
+++ b/src/libslic3r/SLA/SupportTreeUtils.hpp
@@ -498,7 +498,8 @@ std::vector<size_t> non_duplicate_suppt_indices(const PtIndex &index,
                                           !to_remove[i_closest];
                                });
 
-        if ((suppts[i].pos - suppts[closest_idx].pos).norm() < eps)
+        if (closest_idx < suppts.size() &&
+            (suppts[i].pos - suppts[closest_idx].pos).norm() < eps)
             to_remove[i] = true;
     }