X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fgrob-interface-scheme.cc;h=11a5576169761bf4c4c436d7deb92e3b96bce9bc;hb=5d84bfad4626892bcffd05adcced53c8a2329047;hp=843420c9dff1b10d929774e0aeb09d564c6ff3ca;hpb=d2762a4f1add2bb04d6fc34d3c7ae03eeb7d500f;p=lilypond.git

diff --git a/lily/grob-interface-scheme.cc b/lily/grob-interface-scheme.cc
index 843420c9df..11a5576169 100644
--- a/lily/grob-interface-scheme.cc
+++ b/lily/grob-interface-scheme.cc
@@ -19,20 +19,17 @@
 
 #include "lily-guile.hh"
 #include "std-string.hh"
+#include "protected-scm.hh"
 
-static SCM all_ifaces;
+static Protected_scm all_ifaces;
 
 void
 internal_add_interface (SCM a, SCM b, SCM c)
 {
-  if (!all_ifaces)
-    {
-      SCM tab = scm_c_make_hash_table (59);
-      all_ifaces = tab;
-      scm_permanent_object (tab);
-    }
-
-  SCM entry = scm_list_n (a, b, c, SCM_UNDEFINED);
+  if (!all_ifaces.is_bound ())
+    all_ifaces = scm_c_make_hash_table (59);
+
+  SCM entry = scm_list_3 (a, b, c);
 
   scm_hashq_set_x (all_ifaces, a, entry);
 }