From 3776f1afc64d5bcf8079b4e83e0376a79f91573e Mon Sep 17 00:00:00 2001
From: Alessandro Ranellucci <aar@cpan.org>
Date: Sat, 15 Apr 2017 11:10:53 +0200
Subject: [PATCH] Fixed regression causing posPrepareInfill invalidation to
 have no effects. #3874

---
 lib/Slic3r/Print/Object.pm | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/Slic3r/Print/Object.pm b/lib/Slic3r/Print/Object.pm
index 368a23406..300b8e361 100644
--- a/lib/Slic3r/Print/Object.pm
+++ b/lib/Slic3r/Print/Object.pm
@@ -156,7 +156,6 @@ sub prepare_infill {
     my ($self) = @_;
     
     return if $self->step_done(STEP_PREPARE_INFILL);
-    $self->set_step_started(STEP_PREPARE_INFILL);
     
     # This prepare_infill() is not really idempotent.
     # TODO: It should clear and regenerate fill_surfaces at every run 
@@ -164,6 +163,9 @@ sub prepare_infill {
     $self->invalidate_step(STEP_PERIMETERS);
     $self->make_perimeters;
     
+    # Do this after invalidating STEP_PERIMETERS because that would re-invalidate STEP_PREPARE_INFILL
+    $self->set_step_started(STEP_PREPARE_INFILL);
+    
     # prerequisites
     $self->detect_surfaces_type;