Fixing a regression crash in Preset Hints.

1 files changed, 8 insertions, 10 deletions

diff --git a/src/slic3r/GUI/PresetHints.cpp b/src/slic3r/GUI/PresetHints.cpp
index 0e2b7f836..5c5ed2612 100644
--- a/src/slic3r/GUI/PresetHints.cpp
+++ b/src/slic3r/GUI/PresetHints.cpp
@@ -209,22 +209,20 @@ std::string PresetHints::recommended_thin_wall_thickness(const PresetBundle &pre
 		out += _utf8(L("Recommended object thin wall thickness: Not available due to invalid layer height."));
 		return out;
 	}
-
-    Flow    external_perimeter_flow             = Flow::new_from_config_width(
-        frExternalPerimeter, 
-        *print_config.opt<ConfigOptionFloatOrPercent>("external_perimeter_extrusion_width"), 
-        nozzle_diameter, layer_height);
-    Flow    perimeter_flow                      = Flow::new_from_config_width(
-        frPerimeter, 
-        *print_config.opt<ConfigOptionFloatOrPercent>("perimeter_extrusion_width"), 
-        nozzle_diameter, layer_height);
-
     
     if (num_perimeters > 0) {
         int num_lines = std::min(num_perimeters * 2, 10);
         out += (boost::format(_utf8(L("Recommended object thin wall thickness for layer height %.2f and"))) % layer_height).str() + " ";
         // Start with the width of two closely spaced 
         try {
+            Flow external_perimeter_flow = Flow::new_from_config_width(
+                frExternalPerimeter, 
+                *print_config.opt<ConfigOptionFloatOrPercent>("external_perimeter_extrusion_width"), 
+                nozzle_diameter, layer_height);
+            Flow perimeter_flow          = Flow::new_from_config_width(
+                frPerimeter, 
+                *print_config.opt<ConfigOptionFloatOrPercent>("perimeter_extrusion_width"), 
+                nozzle_diameter, layer_height);
 	        double width = external_perimeter_flow.width() + external_perimeter_flow.spacing();
 	        for (int i = 2; i <= num_lines; thin_walls ? ++ i : i += 2) {
 	            if (i > 2)