From 60df1f0bdfc3d4a96f734778823d0466fd67d75d Mon Sep 17 00:00:00 2001
From: Han-Wen Nienhuys <hanwen@xs4all.nl>
Date: Sat, 6 Jan 2007 16:37:38 +0100
Subject: [PATCH] plug memory leak in book identifiers.

---
 lily/book.cc | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/lily/book.cc b/lily/book.cc
index f307bcf3c3..e9f2e3ea2f 100644
--- a/lily/book.cc
+++ b/lily/book.cc
@@ -46,13 +46,17 @@ Book::Book (Book const &s)
   smobify_self ();
 
   if (s.paper_)
-    paper_ = s.paper_->clone ();
+    {
+      paper_ = s.paper_->clone ();
+      paper_->unprotect ();
+    }
   
   input_location_ = make_input (*s.origin ());
+
   header_ = ly_make_anonymous_module (false);
   if (ly_is_module (s.header_))
     ly_module_copy (header_, s.header_);
-
+  
   SCM *t = &scores_;
   for (SCM p = s.scores_; scm_is_pair (p); p = scm_cdr (p))
     {
-- 
2.39.5