diff --git a/lib/Slic3r/ExPolygon.pm b/lib/Slic3r/ExPolygon.pm index e710b265f..526791657 100644 --- a/lib/Slic3r/ExPolygon.pm +++ b/lib/Slic3r/ExPolygon.pm @@ -253,6 +253,7 @@ sub medial_axis { Slic3r::Geometry::polyline_remove_parallel_continuous_edges($polyline); if (Slic3r::Geometry::same_point($polyline->[0], $polyline->[-1])) { + return undef if @$polyline == 2; return Slic3r::Polygon->new(@$polyline[0..$#$polyline-1]); } else { return Slic3r::Polyline->new($polyline);