From: Joe Neeman <joeneeman@gmail.com>
Date: Tue, 3 Jul 2007 23:02:17 +0000 (+1000)
Subject: more robustness if we are asked for a bad number of pages
X-Git-Tag: release/2.11.28-1~33^2~3
X-Git-Url: https://git.donarmstrong.com/?a=commitdiff_plain;h=3ae355d357e6c4e5bd0e6f721d3201881b325116;p=lilypond.git

more robustness if we are asked for a bad number of pages
---

diff --git a/lily/page-breaking.cc b/lily/page-breaking.cc
index 2c137e3684..c4a2cf4881 100644
--- a/lily/page-breaking.cc
+++ b/lily/page-breaking.cc
@@ -726,7 +726,9 @@ Page_breaking::space_systems_on_n_or_one_more_pages (vsize configuration, vsize
 
   Real penalty = blank_page_penalty ();
   n_res.demerits_ += penalty;
-  n_res.force_.back () += penalty;
+
+  if (n_res.force_.size ())
+    n_res.force_.back () += penalty;
 
   return (m_res.demerits_ < n_res.demerits_) ? m_res : n_res;
 }
@@ -759,6 +761,9 @@ Page_breaking::space_systems_on_best_pages (vsize configuration, vsize first_pag
 Page_spacing_result
 Page_breaking::finalize_spacing_result (vsize configuration, Page_spacing_result res)
 {
+  if (res.force_.empty ())
+    return res;
+  
   cache_line_details (configuration);
   res.systems_per_page_ = uncompress_solution (res.systems_per_page_, cached_line_details_);