From 85b0a4376a1c7fdf42d5c70ab9e3612ceb81ee6e Mon Sep 17 00:00:00 2001
From: Alessandro Ranellucci <aar@cpan.org>
Date: Tue, 20 May 2014 23:37:17 +0200
Subject: [PATCH] Use last extruder's settings when adding new ones. #1997

---
 lib/Slic3r/GUI/Tab.pm | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/lib/Slic3r/GUI/Tab.pm b/lib/Slic3r/GUI/Tab.pm
index 7ebc22e114..431d66b191 100644
--- a/lib/Slic3r/GUI/Tab.pm
+++ b/lib/Slic3r/GUI/Tab.pm
@@ -743,7 +743,13 @@ sub _build_extruder_pages {
         # extend options
         foreach my $opt_key ($self->_extruder_options) {
             my $values = $self->{config}->get($opt_key);
-            $values->[$extruder_idx] //= $default_config->get_at($opt_key, 0);
+            if (!defined $values) {
+                $values = [ $default_config->get_at($opt_key, 0) ];
+            } else {
+                # use last extruder's settings for the new one
+                my $last_value = $values->[-1];
+                $values->[$extruder_idx] //= $last_value;
+            }
             $self->{config}->set($opt_key, $values)
                 or die "Unable to extend $opt_key";
         }