From 26051d12ef65c4ddf619eaa6f701d34b65c63896 Mon Sep 17 00:00:00 2001
From: Alessandro Ranellucci <aar@cpan.org>
Date: Tue, 29 May 2012 17:02:47 +0200
Subject: [PATCH] Bugfix: fatal error when a non-manifold object is processed
 on a non-thraeded perl

---
 lib/Slic3r/GUI/Plater.pm | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/Slic3r/GUI/Plater.pm b/lib/Slic3r/GUI/Plater.pm
index 87c736e30..63a697595 100644
--- a/lib/Slic3r/GUI/Plater.pm
+++ b/lib/Slic3r/GUI/Plater.pm
@@ -505,9 +505,9 @@ sub export_gcode2 {
             } else {
                 $print->export_gcode(%params);
             }
-            Slic3r::GUI::warning_catcher($self, sub {
+            Slic3r::GUI::warning_catcher($self, $Slic3r::have_threads ? sub {
                 Wx::PostEvent($self, Wx::PlThreadEvent->new(-1, $MESSAGE_DIALOG_EVENT, shared_clone([@_])));
-            })->($_) for @warnings;
+            } : undef)->($_) for @warnings;
         }
         
         my $message = "Your files were successfully sliced";