lily/stem-engraver.cc: Improve error message for incompatible durations while stemming

diff --git a/lily/stem-engraver.cc b/lily/stem-engraver.cc
index ae5af1a3c451161d06ab0a823c0800ad4ee21d7e..738eaf8d1eec7e0cd4e2202f2b66c1d6c8fec53b 100644 (file)
--- a/lily/stem-engraver.cc
+++ b/lily/stem-engraver.cc
@@ -152,9 +152,10 @@ Stem_engraver::acknowledge_rhythmic_head (Grob_info gi)
 
   if (ds != dc) 
     {
-      // FIXME: 
-      gi.event_cause ()->origin ()->warning (_f ("adding note head to incompatible stem (type = %d)",
-                                                1 << Stem::duration_log (stem_)));
+      ds = Stem::duration_log (stem_);
+      gi.event_cause ()->origin ()->warning (_f ("adding note head to incompatible stem (type = %d/%d)",
+                                                ds < 0 ? 1 << -ds : 1,
+                                                ds > 0 ? 1 << ds : 1));
       gi.event_cause ()->origin ()->warning (_ ("maybe input should specify polyphonic voices"));
     }