From dbaa0f72d186a8fb5dd72055cacf7ed581cfa743 Mon Sep 17 00:00:00 2001
From: Pavel Mikus <pavel.mikus.mail@seznam.cz>
Date: Mon, 2 Jan 2023 10:51:57 +0100
Subject: [PATCH] fix crash in malformations estimation - the nearest line of
 the current support extrusion may not be in the previous layer lines for some
 reason (maybe per object ordering?)

---
 src/libslic3r/SupportSpotsGenerator.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/libslic3r/SupportSpotsGenerator.cpp b/src/libslic3r/SupportSpotsGenerator.cpp
index cb8d0f5d6..023c3b50e 100644
--- a/src/libslic3r/SupportSpotsGenerator.cpp
+++ b/src/libslic3r/SupportSpotsGenerator.cpp
@@ -905,7 +905,7 @@ void estimate_supports_malformations(SupportLayerPtrs &layers, float flow_width,
                 ExtrusionLine  line_out{i > 0 ? annotated_points[i - 1].position.cast<float>() : curr_point.position.cast<float>(),
                                        curr_point.position.cast<float>(), line_len, extrusion};
 
-                const ExtrusionLine nearest_prev_layer_line = prev_layer_lines.get_lines().size() > 0 ?
+                const ExtrusionLine nearest_prev_layer_line = prev_layer_lines.get_lines().size() > curr_point.nearest_prev_layer_line ?
                                                                   prev_layer_lines.get_line(curr_point.nearest_prev_layer_line) :
                                                                   ExtrusionLine{};