From f739eb11af9eb6c35efac8828cf053428c6dc40b Mon Sep 17 00:00:00 2001
From: Joseph Lenox <lenox.joseph@gmail.com>
Date: Mon, 16 Jul 2018 21:54:12 -0500
Subject: [PATCH] fix the config ref to be const

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

diff --git a/xs/src/libslic3r/PrintObject.cpp b/xs/src/libslic3r/PrintObject.cpp
index c305471fb..ec6e192fe 100644
--- a/xs/src/libslic3r/PrintObject.cpp
+++ b/xs/src/libslic3r/PrintObject.cpp
@@ -1151,7 +1151,7 @@ void
 PrintObject::generate_support_material() 
 {
     auto* print { this->_print };
-    auto& config {this->config };
+    const auto& config { this->config };
     //prereqs 
     this->_slice();
     if (this->state.is_done(posSupportMaterial)) { return; }