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src/HOL/Bali/TypeSafe.thy
changeset 18447 da548623916a
parent 18249 4398f0f12579
child 18576 8d98b7711e47 
--- a/src/HOL/Bali/TypeSafe.thy	Tue Dec 20 22:06:00 2005 +0100
+++ b/src/HOL/Bali/TypeSafe.thy	Wed Dec 21 12:02:57 2005 +0100
@@ -1466,7 +1466,7 @@
       next
 	case (VNam vn)
 	with EName el_in_list show ?thesis 
-	  by (auto simp add: dom_def dest: map_upds_cut_irrelevant)
+	  by (auto simp add: not_Some_eq dom_def dest: map_upds_cut_irrelevant)
       qed
     qed
   qed
isabelle