diff --git a/lib/Slic3r/Geometry.pm b/lib/Slic3r/Geometry.pm
index 989f98659..304a0fecf 100644
--- a/lib/Slic3r/Geometry.pm
+++ b/lib/Slic3r/Geometry.pm
@@ -236,7 +236,7 @@ sub polyline_lines {
 }
 
 sub polygon_lines {
-    my ($polygon) = @_;use XXX; ZZZ $polygon if !eval { @$polygon };
+    my ($polygon) = @_;
     return polyline_lines([ @$polygon, $polygon->[0] ]);
 }