From 0571d22d5f6faf807857e9cc3ff7a60acfab6c86 Mon Sep 17 00:00:00 2001
From: bubnikv <bubnikv@gmail.com>
Date: Mon, 12 Feb 2018 15:37:42 +0100
Subject: [PATCH] Fix of https://github.com/prusa3d/Slic3r/issues/707 This is a
 crash due to the recommended thin wall thickness hint.

---
 xs/src/slic3r/GUI/PresetHints.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/xs/src/slic3r/GUI/PresetHints.cpp b/xs/src/slic3r/GUI/PresetHints.cpp
index 36f574329..4553ba476 100644
--- a/xs/src/slic3r/GUI/PresetHints.cpp
+++ b/xs/src/slic3r/GUI/PresetHints.cpp
@@ -238,6 +238,9 @@ std::string PresetHints::recommended_thin_wall_thickness(const PresetBundle &pre
     bool    thin_walls                          = print_config.opt_bool("thin_walls");
     float   nozzle_diameter                     = float(printer_config.opt_float("nozzle_diameter", 0));
     
+    if (layer_height <= 0.f)
+        return "Recommended object thin wall thickness: Not available due to invalid layer height.";
+
     Flow    external_perimeter_flow             = Flow::new_from_config_width(
         frExternalPerimeter, 
         *print_config.opt<ConfigOptionFloatOrPercent>("external_perimeter_extrusion_width"),