From: Patrick McCarty <pnorcks@gmail.com>
Date: Sun, 27 Jun 2010 19:57:22 +0000 (-0700)
Subject: Fix #1156.
X-Git-Tag: release/2.13.27-1~69
X-Git-Url: https://git.donarmstrong.com/?a=commitdiff_plain;h=301db9e8fafc31b76d4a974b2e7a56924f0e80d2;p=lilypond.git

Fix #1156.

Sometimes the check for the *left* broken neighbor may be a spacer rest,
which appears to be a generic Spanner with direction CENTER.

An additional check is needed to make sure the grob in question is a
Slur or PhrasingSlur, or else an assertion will be raised -- slurs must
have a direction of either UP or DOWN.
---

diff --git a/lily/slur-scoring.cc b/lily/slur-scoring.cc
index a43daa3ed4..a1f761acf2 100644
--- a/lily/slur-scoring.cc
+++ b/lily/slur-scoring.cc
@@ -85,7 +85,9 @@ Slur_score_state::~Slur_score_state ()
 Direction
 Slur_score_state::slur_direction () const
 {
-  if (Grob *left_neighbor = slur_->broken_neighbor (LEFT))
+  Grob *left_neighbor = slur_->broken_neighbor (LEFT);
+
+  if (left_neighbor && Slur::has_interface (left_neighbor))
     return get_grob_direction (left_neighbor);
 
   Direction dir = get_grob_direction (slur_);