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+Require Import Int31 BigN.
+
+Open Scope int31_scope.
+
+(* This used to go through because of an unbalanced stack bug in the bytecode
+interpreter *)
+
+Lemma bad : False.
+assert (1 = 2).
+change 1 with (add31 (addmuldiv31 65 (add31 1 1) 2) 1).
+Fail vm_compute; reflexivity.
+(*
+discriminate.
+Qed.
+*)
+Abort.
+