diff -r 75f7a77e53bb -r 9f906a2eb0e7 src/HOL/Quickcheck_Examples/Quickcheck_Nesting_Example.thy
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/HOL/Quickcheck_Examples/Quickcheck_Nesting_Example.thy	Thu Sep 01 12:10:52 2016 +0200
@@ -0,0 +1,11 @@
+theory Quickcheck_Nesting_Example
+imports Quickcheck_Nesting
+begin
+
+datatype x = X "x list"
+
+lemma "X a = X b"
+quickcheck[exhaustive, size = 4, expect = counterexample]
+oops
+
+end