From 7a0f07c4245ec2a8e10fdde8cd394a1e6e4d012e Mon Sep 17 00:00:00 2001
From: Arthur <arthur.tang@bambulab.com>
Date: Fri, 14 Feb 2025 20:16:08 +0800
Subject: [PATCH] FIX: auto arranging crash due to wrong extruder_ids

jira: STUDIO-10449
Change-Id: Ia4614a67843c714c46e5fbf7c888a1ac45ef378d
(cherry picked from commit ef8e81c04aded239264a88f67ca3517be432775a)
---
 src/libslic3r/Model.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/libslic3r/Model.cpp b/src/libslic3r/Model.cpp
index b3211103df..db0faf269e 100644
--- a/src/libslic3r/Model.cpp
+++ b/src/libslic3r/Model.cpp
@@ -3320,6 +3320,7 @@ void ModelInstance::get_arrange_polygon(void *ap, const Slic3r::DynamicPrintConf
         if (op2 && (extruder_id = op2->getInt()) > 0) ret.extrude_ids.push_back(extruder_id);
     }
 
+    ret.extrude_ids.erase(std::unique(ret.extrude_ids.begin(), ret.extrude_ids.end()), ret.extrude_ids.end());
     if (ret.extrude_ids.empty()) //the default extruder
         ret.extrude_ids.push_back(1);
 }