From 64892c2203706c60548dafa8259f5b7c9fed2797 Mon Sep 17 00:00:00 2001
From: Alessandro Ranellucci <aar@cpan.org>
Date: Sat, 10 Mar 2012 23:49:24 +0100
Subject: [PATCH] Bugfix: fatal error on some models. #255

---
 lib/Slic3r/Fill/Rectilinear.pm | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/Slic3r/Fill/Rectilinear.pm b/lib/Slic3r/Fill/Rectilinear.pm
index 9d264a8d5..2d589a67d 100644
--- a/lib/Slic3r/Fill/Rectilinear.pm
+++ b/lib/Slic3r/Fill/Rectilinear.pm
@@ -16,6 +16,7 @@ sub fill_surface {
     $self->rotate_points($expolygon, $rotate_vector);
     
     my ($expolygon_off) = $expolygon->offset_ex(scale 0.2);
+    return {} if !$expolygon_off;  # skip some very small polygons (which shouldn't arrive here)
     my $bounding_box = [ $expolygon_off->bounding_box ];
     
     my $min_spacing = scale $params{flow_spacing};