Fix and document usage of `convert-ly - < test.ly'.

[lilypond.git] / lily / page-spacing.cc

diff --git a/lily/page-spacing.cc b/lily/page-spacing.cc
index 9434fb910aab7705be46630374f25a5bc4e51cd6..c2988d8502e37785a54ebf658932710aa310c6bb 100644 (file)
--- a/lily/page-spacing.cc
+++ b/lily/page-spacing.cc
@@ -155,6 +155,9 @@ Page_spacer::solve ()
     }
 
   Page_spacing_result ret;
+  if (simple_state_.empty ())
+    return ret;
+
   ret.penalty_ = simple_state_.back ().penalty_
                  + lines_.back ().page_penalty_ + lines_.back ().turn_penalty_;
   ret.system_count_status_ = simple_state_.back ().system_count_status_;