From f11196525b8e61823f9b3eba44c16397ed5e8462 Mon Sep 17 00:00:00 2001
From: Alessandro Ranellucci <aar@cpan.org>
Date: Sun, 18 Jan 2015 12:12:10 +0100
Subject: [PATCH] Handle empty STL files gracefully instead of crashing. #2557

---
 lib/Slic3r/Format/STL.pm | 3 +++
 lib/Slic3r/Model.pm      | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/lib/Slic3r/Format/STL.pm b/lib/Slic3r/Format/STL.pm
index c9fc303ff..11928d8b2 100644
--- a/lib/Slic3r/Format/STL.pm
+++ b/lib/Slic3r/Format/STL.pm
@@ -14,6 +14,9 @@ sub read_file {
     $mesh->ReadSTLFile($path);
     $mesh->repair;
     
+    die "This STL file couldn't be read because it's empty.\n"
+        if $mesh->facets_count == 0;
+    
     my $model = Slic3r::Model->new;
     
     my $basename = basename($file);
diff --git a/lib/Slic3r/Model.pm b/lib/Slic3r/Model.pm
index a7a3009ae..1a2f62afd 100644
--- a/lib/Slic3r/Model.pm
+++ b/lib/Slic3r/Model.pm
@@ -12,6 +12,9 @@ sub read_from_file {
               : $input_file =~ /\.amf(\.xml)?$/i    ? Slic3r::Format::AMF->read_file($input_file)
               : die "Input file must have .stl, .obj or .amf(.xml) extension\n";
     
+    die "The supplied file couldn't be read because it's empty.\n"
+        if $model->objects_count == 0;
+    
     $_->set_input_file($input_file) for @{$model->objects};
     return $model;
 }