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src/HOL/Library/code_lazy.ML
changeset 74561 8e6c973003c8
parent 74383 107941e8fa01
child 80634 a90ab1ea6458 
--- a/src/HOL/Library/code_lazy.ML	Wed Oct 20 17:11:46 2021 +0200
+++ b/src/HOL/Library/code_lazy.ML	Wed Oct 20 18:13:17 2021 +0200
@@ -56,7 +56,6 @@
   type T = lazy_info Symtab.table;
   val empty = Symtab.empty;
   val merge = Symtab.join (fn _ => fn (_, record) => record);
-  val extend = I;
 );
 
 fun fold_type type' tfree tvar typ =
isabelle