Imported Upstream version 2.18.0

[lilypond.git] / lily / constrained-breaking.cc

diff --git a/lily/constrained-breaking.cc b/lily/constrained-breaking.cc
index c8b7fc1d748bc06ae2074d33d436d77ab1bdd2e5..f8d4b0f5b2280d10ca669a1cb1678b3bdd5dc7ab 100644 (file)
--- a/lily/constrained-breaking.cc
+++ b/lily/constrained-breaking.cc
@@ -202,8 +202,10 @@ Constrained_breaking::solve (vsize start, vsize end, vsize sys_count)
         }
     }
   /* if we get to here, just put everything on one line */
-  warning (_ ("cannot find line breaking that satisfies constraints"));
-  ret.push_back (space_line (0, end_brk));
+  if (sys_count > 0) {
+    warning (_ ("cannot find line breaking that satisfies constraints"));
+    ret.push_back (space_line (0, end_brk));
+  }
   return ret;
 }
 
@@ -291,9 +293,11 @@ Constrained_breaking::line_details (vsize start, vsize end, vsize sys_count)
     }
 
   /* if we get to here, just put everything on one line */
-  Line_details details;
-  fill_line_details (&details, 0, end_brk);
-  ret.push_back (details);
+  if (sys_count > 0) {
+    Line_details details;
+    fill_line_details (&details, 0, end_brk);
+    ret.push_back (details);
+  }
   return ret;
 }
 
@@ -567,7 +571,9 @@ Line_details::Line_details (Prob *pb, Output_def *paper)
 
   last_column_ = 0;
   force_ = 0;
-  Interval stencil_extent = unsmob_stencil (pb->get_property ("stencil"))->extent (Y_AXIS);
+  Stencil *st = unsmob_stencil (pb->get_property ("stencil"));
+  Interval stencil_extent = st->is_empty (Y_AXIS) ? Interval (0, 0)
+    : st->extent (Y_AXIS);
   shape_ = Line_shape (stencil_extent, stencil_extent); // pretend it goes all the way across
   tallness_ = 0;
   bottom_padding_ = 0;