diff -r a3c163ed1e04 -r 7f2977e96a5c src/HOL/simpdata.ML
--- a/src/HOL/simpdata.ML	Sat Jul 10 21:46:15 1999 +0200
+++ b/src/HOL/simpdata.ML	Sat Jul 10 21:48:27 1999 +0200
@@ -31,7 +31,7 @@
                     else  cla addSIs [th]
               | _ => cla addSIs [th],
        simp addsimps [th])
-      handle _ => error ("AddIffs: theorem must be unconditional\n" ^ 
+      handle TERM _ => error ("AddIffs: theorem must be unconditional\n" ^ 
                          string_of_thm th);
 
   fun delIff ((cla, simp), th) = 
@@ -45,7 +45,7 @@
                     else cla delrules [th]
               | _ => cla delrules [th],
        simp delsimps [th])
-      handle _ => (warning("DelIffs: ignoring conditional theorem\n" ^ 
+      handle TERM _ => (warning("DelIffs: ignoring conditional theorem\n" ^ 
                           string_of_thm th); (cla, simp));
 
   fun store_clasimp (cla, simp) = (claset_ref () := cla; simpset_ref () := simp)