diff -r ea1d9408a233 -r 29ec8680e61f src/HOL/Tools/Sledgehammer/sledgehammer_prover_atp.ML
--- a/src/HOL/Tools/Sledgehammer/sledgehammer_prover_atp.ML	Thu Feb 13 13:16:16 2014 +0100
+++ b/src/HOL/Tools/Sledgehammer/sledgehammer_prover_atp.ML	Thu Feb 13 13:16:17 2014 +0100
@@ -353,8 +353,8 @@
           (used_facts,
            Lazy.lazy (fn () =>
              let val used_pairs = used_from |> filter_used_facts false used_facts in
-               play_one_line_proof mode verbose preplay_timeout used_pairs state subgoal (hd meths)
-                 meths
+               play_one_line_proof mode debug verbose preplay_timeout used_pairs state subgoal
+                 (hd meths) meths
              end),
            fn preplay =>
               let