From 6ec7069f8e165dea47381b907755cc5a6f437e31 Mon Sep 17 00:00:00 2001
From: Alessandro Ranellucci <aar@cpan.org>
Date: Wed, 16 Nov 2011 21:00:50 +0100
Subject: [PATCH] Display usage when unknown options are passed

---
 slic3r.pl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/slic3r.pl b/slic3r.pl
index f4b7f173a..001bbb023 100755
--- a/slic3r.pl
+++ b/slic3r.pl
@@ -76,7 +76,7 @@ GetOptions(
     'duplicate-x=i'         => \$Slic3r::duplicate_x,
     'duplicate-y=i'         => \$Slic3r::duplicate_y,
     'duplicate-distance=i'  => \$Slic3r::duplicate_distance,
-);
+) or usage(1);
 
 # load configuration
 if ($opt{load}) {